f9.9h f15c f20b - yamaha motor

Read this manual carefully before operating thisoutboard motor.

OWNER’S MANUAL

F9.9HF15CF20B

6AG-28199-79-E0

6AG-9-79-1E0.book 1 ページ２０１４年１１月１０日　月曜日　午後４時８分

EMU25053

Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.


Important manual informationEMU25108

To the ownerThank you for selecting a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for proper operation, mainte-nance and care. A thorough understandingof these simple instructions will help you ob-tain maximum enjoyment from your newYamaha. If you have any question about theoperation or maintenance of your outboardmotor, please consult a Yamaha dealer.In this Owner’s Manual particularly importantinformation is distinguished in the followingways.

: This is the safety alert symbol. It isused to alert you to potential personal injuryhazards. Obey all safety messages that fol-low this symbol to avoid possible injury ordeath.

WARNINGEWM00782

A WARNING indicates a hazardous situa-tion which, if not avoided, could result indeath or serious injury.

NOTICEECM00702

A NOTICE indicates special precautionsthat must be taken to avoid damage to theoutboard motor or other property.

TIP:A TIP provides key information to make pro-cedures easier or clearer.

Yamaha continually seeks advancements inproduct design and quality. Therefore, whilethis manual contains the most current prod-uct information available at the time of print-ing, there may be minor discrepanciesbetween your machine and this manual. If

there is any question concerning this manu-al, please consult your Yamaha dealer.To ensure long product life, Yamaha recom-mends that you use the product and performthe specified periodic inspections and main-tenance by correctly following the instruc-tions in the owner’s manual. Any damageresulting from neglect of these instructions isnot covered by warranty.Some countries have laws or regulations re-stricting users from taking the product out ofthe country where it was purchased, and itmay be impossible to register the product inthe destination country. Additionally, the war-ranty may not apply in certain regions. Whenplanning to take the product to another coun-try, consult the dealer where the product waspurchased for further information.If the product was purchased used, pleaseconsult your closest dealer for customer re-registration, and to be eligible for the speci-fied services.

TIP:The F9.9HMH, F9.9HE, F15CE, F15CEH,F15CEP, F15CMH, F20BE, F20BEH,F20BEP, F20BMH and the standard acces-sories are used as a base for the explana-tions and illustrations in this manual.Therefore some items may not apply to ev-ery model.


Important manual informationEMU25122

F9.9H, F15C, F20BOWNER’S MANUAL

©2014 by Yamaha Motor Co., Ltd.1st Edition, November 2014

All rights reserved.Any reprinting or unauthorized usewithout the written permission of

Yamaha Motor Co., Ltd.is expressly prohibited.

Printed in Japan


Table of contentsSafety information............................. 1

Outboard motor safety ..................... 1Propeller .............................................. 1Rotating parts ...................................... 1Hot parts.............................................. 1Electric shock ...................................... 1Power tilt.............................................. 1Engine shut-off cord (lanyard) ............. 1Gasoline .............................................. 1Gasoline exposure and spills .............. 2Carbon monoxide ................................ 2Modifications ....................................... 2

Boating safety .................................. 2Alcohol and drugs................................ 2Personal flotation devices (PFDs) ....... 2People in the water.............................. 2Passengers ......................................... 2Overloading ......................................... 2Avoid collisions.................................... 3Weather............................................... 3Passenger training .............................. 3Boating safety publications.................. 3Laws and regulations .......................... 3

General information .......................... 4Identification numbers record........... 4

Outboard motor serial number ............ 4Key number ......................................... 4

EC Declaration of Conformity (DoC) ............................................ 4

CE Marking ..................................... 5Read manuals and labels................. 6

Warning labels .................................... 6

Specifications and requirements..... 9Specifications ................................... 9Installation requirements ................ 11

Boat horsepower rating ..................... 11Mounting motor ................................. 12

Remote control requirements......... 12Battery requirements...................... 12

Battery specifications ........................ 12Mounting battery................................ 12

Multiple batteries ............................... 12Without a rectifier or Rectifier

Regulator ....................................... 12Propeller selection ......................... 13Start-in-gear protection .................. 13Engine oil requirements ................. 13Fuel requirements .......................... 14

Gasoline ............................................ 14Muddy or acidic water .................... 14Anti-fouling paint ............................ 15Motor disposal requirements.......... 15Emergency equipment ................... 15

Components .................................... 16Components diagram..................... 16

Fuel tank............................................ 16Fuel joint ............................................ 17Fuel gauge ........................................ 17Fuel tank cap..................................... 17Air vent screw.................................... 17Remote control box ........................... 17Remote control lever ......................... 18Neutral interlock trigger ..................... 18Neutral throttle lever .......................... 18Tiller handle ...................................... 18Gear shift lever ................................. 19Throttle grip ...................................... 19Throttle indicator ............................... 19Throttle friction adjuster ..................... 19Engine shut-off cord (lanyard) and

clip.................................................. 20Engine stop button ........................... 20Manual starter handle........................ 21Starter button..................................... 21Main switch........................................ 21Power tilt switch................................. 21Steering friction adjuster.................... 22Trim tab ............................................. 23Trim rod (tilt pin) ................................ 23Tilt lock mechanism........................... 23Tilt support knob................................ 24Tilt support bar .................................. 24Power tilt unit ..................................... 24Cowling lock lever (pull up type)........ 25


Table of contentsFlushing device ................................. 25Alert indicator ................................... 25

Instruments and indicators ............ 26Indicators ....................................... 26

Low oil pressure-alert indicator ......... 26Overheat-alert indicator..................... 26

Engine control system.................... 27Alert system ................................... 27

Overheat alert.................................... 27Low oil pressure alert ........................ 27

Installation ....................................... 29Installation ...................................... 29

Mounting the outboard motor ............ 29Clamping the outboard motor............ 31

Operation ......................................... 32First-time operation ........................ 32

Fill engine oil ..................................... 32Breaking in engine............................. 32Getting to know your boat ................. 32

Checks before starting engine ....... 32Fuel level ........................................... 33Remove the top cowling .................... 33Fuel system....................................... 33Controls ............................................. 33Engine shut-off cord (lanyard) ........... 34Engine oil........................................... 34Engine ............................................... 35Flushing device ................................. 35Install top cowling .............................. 35Checking power tilt system................ 36Battery ............................................... 36

Filling fuel ...................................... 36Operating engine............................ 37

Sending fuel (portable tank) .............. 37Starting engine .................................. 38

Checks after starting engine .......... 43Cooling water .................................... 43

Warming up engine ........................ 43

Manual start and electric start models ........................................... 43

Checks after engine warm up ........ 44Shifting .............................................. 44Stop switches .................................... 44

Shifting ........................................... 44Stopping boat................................. 45Stopping engine............................. 46

Procedure.......................................... 46Trimming outboard motor............... 46

Adjusting trim angle for manual tilt models ........................................... 47

Adjusting trim angle (power tilt models) .......................................... 47

Adjusting boat trim............................. 48Tilting up and down........................ 49

Procedure for tilting up (manual tilt models) .......................................... 49

Procedure for tilting up (power tilt models) .......................................... 50

Procedure for tilting down (manual tilt models)..................................... 51

Procedure for tilting down (power tilt models) .......................................... 52

Shallow water ................................ 52Cruising in shallow water (manual

tilt models)...................................... 52Power tilt models ............................... 53

Cruising in other conditions............ 54

Maintenance .................................... 55Transporting and storing outboard

motor........................................... 55Dismounting the outboard motor ....... 55Storing outboard motor...................... 56Procedure.......................................... 57Lubrication......................................... 58Flushing power unit ........................... 58Cleaning the outboard motor ............. 59Checking painted surface of

outboard motor............................... 59Periodic maintenance .................... 59

Replacement parts ............................ 59Severe operating conditions.............. 60


Table of contentsMaintenance chart 1.......................... 61Maintenance chart 2.......................... 63Greasing............................................ 64Cleaning and adjusting spark plug .... 65Checking fuel filter............................. 66Inspecting idle speed......................... 66Changing engine oil........................... 67Inspecting wiring and connectors ...... 69Checking propeller ............................ 69Removing propeller ........................... 70Installing propeller ............................. 70Changing gear oil .............................. 71Cleaning fuel tank.............................. 72Inspecting and replacing anode(s) .... 73Checking battery (for electric start

models) .......................................... 73Connecting the battery ...................... 74Disconnecting the battery.................. 74

Trouble Recovery............................ 75Troubleshooting ............................. 75Temporary action in emergency..... 78

Impact damage.................................. 78Replacing fuse................................... 78Power tilt will not operate .................. 79Starter will not operate ...................... 79Emergency starting engine (manual

starter model)................................. 80Emergency starting engine (electric

start model) .................................... 81Treatment of submerged motor...... 83

INDEX ............................................... 84


1

Safety informationEMU33623

Outboard motor safetyObserve these precautions at all times.EMU36502

PropellerPeople can be injured or killed if they comein contact with the propeller. The propellercan keep moving even when the motor is inneutral, and sharp edges of the propeller cancut even when stationary. Stop the engine when a person is in the

water near you. Keep people out of reach of the propeller,

even when the engine is off.EMU33631

Rotating partsHands, feet, hair, jewelry, clothing, PFDstraps, etc. can become entangled with inter-nal rotating parts of the engine, resulting inserious injury or death.Keep the top cowling in place whenever pos-sible. Do not remove or replace the cowlingwith the engine running.Only operate the engine with the cowling re-moved according to the specific instructionsin the manual. Keep hands, feet, hair, jewel-ry, clothing, PFD straps, etc. away from anyexposed moving parts.EMU33641

Hot partsDuring and after operation, engine parts arehot enough to cause burns. Avoid touchingany parts under the top cowling until the en-gine has cooled.EMU33651

Electric shockDo not touch any electrical parts while start-ing or operating the engine. They can causeshock or electrocution.EMU34791

Power tiltBody parts can be crushed between the mo-

tor and the clamp bracket when the motor istrimmed or tilted. Keep body parts out of thisarea at all times. Be sure no one is in thisarea before operating the power tilt mecha-nism.The power tilt switches operate even whenthe main switch is off. Keep people be awayfrom the switches whenever working aroundthe motor.Never get under the lower unit while it is tilt-ed, even when the tilt support lever or knobis locked. Severe injury could occur if theoutboard motor accidentally falls.EMU33672

Engine shut-off cord (lanyard)Attach the engine shut-off cord so that theengine stops if the operator falls overboardor leaves the helm. This prevents the boatfrom running away under power and leavingpeople stranded, or running over people orobjects.Always attach the engine shut-off cord to asecure place on your clothing or your arm orleg while operating. Do not remove it to leavethe helm while the boat is moving. Do not at-tach the cord to clothing that could tearloose, or route the cord where it could be-come entangled, preventing it from function-ing.Do not route the cord where it is likely to beaccidentally pulled out. If the cord is pulledduring operation, the engine will shut off andyou will lose most steering control. The boatcould slow rapidly, throwing people and ob-jects forward.EMU33811

GasolineGasoline and its vapors are highly flam-mable and explosive. Always, refuel ac-cording to the procedure on page 37 toreduce the risk of fire and explosion.


Safety information

2

EMU33821

Gasoline exposure and spillsTake care not to spill gasoline. If gasolinespills, wipe it up immediately with dry rags.Dispose of rags properly.If any gasoline spills onto your skin, immedi-ately wash with soap and water. Changeclothing if gasoline spills on it.If you swallow gasoline, inhale a lot of gaso-line vapor, or get gasoline in your eyes, getimmediate medical attention. Never siphonfuel by mouth.EMU33901

Carbon monoxideThis product emits exhaust gases which con-tain carbon monoxide, a colorless, odorlessgas which may cause brain damage or deathwhen inhaled. Symptoms include nausea,dizziness, and drowsiness. Keep cockpit andcabin areas well ventilated. Avoid blockingexhaust outlets.EMU33781

ModificationsDo not attempt to modify this outboard mo-tor. Modifications to your outboard motormay reduce safety and reliability, and renderthe outboard unsafe or illegal to use.EMU33741

Boating safetyThis section includes a few of the many im-portant safety precautions that you shouldfollow when boating.EMU33711

Alcohol and drugsNever operate after drinking alcohol or takingdrugs. Intoxication is one of the most com-mon factors contributing to boating fatalities.EMU40281

Personal flotation devices (PFDs)Have an approved PFD on board for everyoccupant. Yamaha recommends that youmust wear a PFD whenever boating. At a

minimum, children and non-swimmersshould always wear PFDs, and everyoneshould wear PFDs when there are potentiallyhazardous boating conditions.EMU33732

People in the waterAlways watch carefully for people in the wa-ter, such as swimmers, skiers, or divers,whenever the engine is running. Whensomeone is in the water near the boat, shiftinto neutral and stop the engine.Stay away from swimming areas. Swimmerscan be hard to see.The propeller can keep moving even whenthe motor is in neutral. Stop the engine whena person is in the water near you.EMU33752

PassengersConsult your boat manufacturer’s instruc-tions for details about appropriate passengerlocations in your boat and be sure all pas-sengers are positioned properly before ac-celerating and when operating above an idlespeed. Standing or sitting in non-designatedlocations may result in being thrown eitheroverboard or within the boat due to waves,wakes, or sudden changes in speed or direc-tion. Even when people are positioned prop-erly, alert your passengers if you must makeany unusual maneuver. Always avoid jump-ing waves or wakes.EMU33762

OverloadingDo not overload the boat. Consult the boatcapacity plate or boat manufacturer for max-imum weight and number of passengers. Besure that weight is properly distributed ac-cording to the boat manufacturer’s instruc-tions. Overloading or incorrect weightdistribution can compromise the boats han-dling and lead to an accident, capsizing orswamping.


Safety information

3

EMU33773

Avoid collisionsScan constantly for people, objects, and oth-er boats. Be alert for conditions that limit yourvisibility or block your vision of others.

Operate defensively at safe speeds andkeep a safe distance away from people, ob-jects, and other boats. Do not follow directly behind other boats or

waterskiers. Avoid sharp turns or other maneuvers that

make it hard for others to avoid you or un-derstand where you are going.

Avoid areas with submerged objects orshallow water.

Ride within your limits and avoid aggres-sive maneuvers to reduce the risk of lossof control, ejection, and collision.

Take early action to avoid collisions. Re-member, boats do not have brakes, andstopping the engine or reducing throttlecan reduce the ability to steer. If you arenot sure that you can stop in time beforehitting an obstacle, apply throttle and turnin another direction.

EMU33791

WeatherStay informed about the weather. Checkweather forecasts before boating. Avoidboating in hazardous weather.

EMU33881

Passenger trainingMake sure at least one other passenger istrained to operate the boat in the event of anemergency.EMU33891

Boating safety publicationsBe informed about boating safety. Additionalpublications and information can be obtainedfrom many boating organizations.EMU33601

Laws and regulationsKnow the marine laws and regulations whereyou will be boating- and obey them. Severalsets of rules prevail according to geographiclocation, but all are basically the same as theInternational Rules of the Road.

ZMU06025


4

General informationEMU25172

Identification numbers recordEMU25186

Outboard motor serial numberThe outboard motor serial number isstamped on the label attached to the portside of the clamp bracket.Record your outboard motor serial number inthe spaces provided to assist you in orderingspare parts from your Yamaha dealer or forreference in case your outboard motor is sto-len.

EMU25192

Key numberIf a main key switch is equipped with the mo-tor, the key identification number is stampedon your key as shown in the illustration. Re-cord this number in the space provided forreference in case you need a new key.

EMU37292

EC Declaration of Conformity (DoC)

This outboard motor conforms to certain por-

1. Outboard motor serial number location

1. Outboard motor serial number location

1

ZMU05335

1

ZMU05336

1. Serial number2. Model name3. Motor transom height4. Approved model code

1. Key number

34 12

ZMU01692


General information

5

tions of the European Parliament directiverelating to machinery.Each conformed outboard motor accompa-nied with EC DoC.EC DoC contains the fol-lowing information; Name of Engine Manufacture Model name Product code of model (Approved model

code) Code of conformed directivesEMU25207

CE Marking Outboard motors affixed with this “CE”mark-ing conform with the directives of;2006/42/EC, 94/25/EC - 2003/44/EC and2004/108/EC.

1. CE marking location

1. CE marking location

ZMU055901

ZMU07465

1

ZMU06040


General information

6

EMU33524

Read manuals and labelsBefore operating or working on this outboard motor: Read this manual. Read any manuals supplied with the boat. Read all labels on the outboard motor and the boat.If you need any additional information, contact your Yamaha dealer.EMU33834

Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements.

ZMU06638

1 2

3


General information

7

EMU33913

Contents of labelsThe above warning labels mean as follows.1

WARNINGEWM01692

Emergency starting does not have start-in-gear protection. Ensure shift control isin neutral before starting engine.

2

WARNINGEWM01682

Keep hands, hair, and clothing awayfrom rotating parts while the engine isrunning.

Do not touch or remove electrical partswhen starting or during operation.

3

WARNINGEWM01672

Read Owner’s Manuals and labels. Wear an approved personal flotation

device (PFD). Attach engine shut-off cord (lanyard) to

your PFD, arm, or leg so the enginestops if you accidentally leave thehelm, which could prevent a runawayboat.

ZMU05706

1 2

3


General information

8

EMU33844

SymbolsThe following symbols mean as follows.

Notice/Warning

Read Owner’s Manual

Hazard caused by continuous rotation

Electrical hazard

Remote control lever/gear shift lever operat-ing direction, dual direction

Engine start/ Engine cranking

ZMU05696

ZMU05664

ZMU05665

ZMU05666

ZMU05667

ZMU05668


9

Specifications and requirementsEMU34522

SpecificationsTIP:“(AL)” stated in the specification data belowrepresents the numerical value for the alumi-num propeller installed.Likewise, “(SUS)” represents the value forstainless steel propeller installed and “(PL)”for plastic propeller installed.EMU2821V

Dimension and weight:Overall length:

F15CE 665 mm (26.2 in)F15CEH 1048 mm (41.3 in)F15CEP 665 mm (26.2 in)F15CMH 1048 mm (41.3 in)F20BE 665 mm (26.2 in)F20BEH 1048 mm (41.3 in)F20BEP 665 mm (26.2 in)F20BMH 1048 mm (41.3 in)F9.9HE 665 mm (26.2 in)F9.9HMH 1048 mm (41.3 in)

Overall width:F15CE 390 mm (15.4 in)F15CEH 390 mm (15.4 in)F15CEP 390 mm (15.4 in)F15CMH 420 mm (16.5 in)F20BE 390 mm (15.4 in)F20BEH 386 mm (15.2 in)F20BEP 390 mm (15.4 in)F20BMH 420 mm (16.5 in)F9.9HE 390 mm (15.4 in)F9.9HMH 420 mm (16.5 in)

Overall height S:F15CE 1078 mm (42.4 in)F15CMH 1078 mm (42.4 in)F20BE 1078 mm (42.4 in)F20BEP 1078 mm (42.4 in)F20BMH 1078 mm (42.4 in)F9.9HE 1078 mm (42.4 in)

F9.9HMH 1078 mm (42.4 in)Overall height L:

1205 mm (47.4 in)Motor transom height S:

F15CE 438 mm (17.2 in)F15CMH 438 mm (17.2 in)F20BE 438 mm (17.2 in)F20BEP 443 mm (17.4 in)F20BMH 438 mm (17.2 in)F9.9HE 438 mm (17.2 in)F9.9HMH 438 mm (17.2 in)

Motor transom height L:F15CE 565 mm (22.2 in)F15CEH 565 mm (22.2 in)F15CEP 570 mm (22.4 in)F15CMH 565 mm (22.2 in)F20BE 565 mm (22.2 in)F20BEH 565 mm (22.2 in)F20BEP 570 mm (22.4 in)F20BMH 565 mm (22.2 in)F9.9HE 565 mm (22.2 in)F9.9HMH 565 mm (22.2 in)

Dry weight (AL) S:F15CE 52 kg (115 lb)F15CMH 51 kg (112 lb)F20BE 52 kg (115 lb)F20BEP 57 kg (126 lb)F20BMH 51 kg (112 lb)F9.9HE 52 kg (115 lb)F9.9HMH 51 kg (112 lb)

Dry weight (AL) L:F15CE 54 kg (119 lb)F15CEH 56 kg (123 lb)F15CEP 59 kg (130 lb)F15CMH 53 kg (117 lb)F20BE 54 kg (119 lb)F20BEH 56 kg (123 lb)F20BEP 59 kg (130 lb)F20BMH 53 kg (117 lb)F9.9HE 54 kg (119 lb)F9.9HMH 53 kg (117 lb)


Specifications and requirements

10

Performance:Full throttle operating range:

5000–6000 r/minRated power:

F9.9HE 7.3 kW (9.9 HP)F9.9HMH 7.3 kW (9.9 HP)

Rated power:F15CE 11.0 kW (15 HP)F15CEH 11.0 kW (15 HP)F15CEP 11.0 kW (15 HP)F15CMH 11.0 kW (15 HP)F20BE 14.7 kW (20 HP)F20BEH 14.7 kW (20 HP)F20BEP 14.7 kW (20 HP)F20BMH 14.7 kW (20 HP)

Idle speed (in neutral):1000–1100 r/min

Power unit:Type:

4-stroke SOHC L2 4 valvesTotal displacement:

362 cm3 (22.1 c.i.)Bore stroke:

63.0 58.1 mm (2.48 2.29 in)Ignition system:

CDISpark plug (NGK):

DPR6EB-9Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)Steering system:

F15CE Remote steeringF15CEH Tiller handleF15CEP Remote steeringF15CMH Tiller handleF20BE Remote steeringF20BEH Tiller handleF20BEP Remote steeringF20BMH Tiller handleF9.9HE Remote steeringF9.9HMH Tiller handle

Starting system:F15CE Electric starterF15CEH Electric starterF15CEP Electric starterF15CMH Manual starterF20BE Electric starterF20BEH Electric starterF20BEP Electric starterF20BMH Manual starterF9.9HE Electric starterF9.9HMH Manual starter

Starting carburetion system:Prime start

Valve clearance IN (cold engine):0.15–0.25 mm (0.0059–0.0098 in)

Valve clearance EX (cold engine):0.25–0.35 mm (0.0098–0.0138 in)

Battery rating (CCA/EN):F15CE 347–411 AF15CEH 347–411 AF15CEP 347–411 AF20BE 347–411 AF20BEH 347–411 AF20BEP 347–411 AF9.9HE 347–411 A

Battery rating (20HR/IEC):F15CE 40 AhF15CEH 40 AhF15CEP 40 AhF20BE 40 AhF20BEH 40 AhF20BEP 40 AhF9.9HE 40 Ah

Maximum generator output:F15CE 10 AF15CEH 10 AF15CEP 10 AF20BE 10 AF20BEH 10 AF20BEP 10 AF9.9HE 10 A



11

Lower unit:Gear shift positions:

Forward-neutral-reverseGear ratio:

2.08 (27/13)Trim and tilt system:

F15CE Manual tiltF15CEH Manual tiltF15CEP Power tiltF15CMH Manual tiltF20BE Manual tiltF20BEH Manual tiltF20BEP Power tiltF20BMH Manual tiltF9.9HE Manual tiltF9.9HMH Manual tilt

Propeller mark:F9.9H J/J1F15C J/J1F20B J1

Fuel and oil:Recommended fuel:

Regular unleaded gasolineMin. research octane number (RON):

90Fuel tank capacity:

25 L (6.60 US gal, 5.50 Imp.gal)Recommended engine oil:

YAMALUBE 4 or 4-stroke outboard motor oil

Recommended engine oil grade 1:SAE 10W-30/10W-40/5W-30 API SE/SF/SG/SH/SJ/SL

Engine oil quantity (without oil filter re-placement):

1.6 L (1.69 US qt, 1.41 Imp.qt)Engine oil quantity (with oil filter replace-ment):

1.8 L (1.90 US qt, 1.58 Imp.qt)Lubrication system:

Wet sump

Recommended gear oil:YAMALUBE outboard gear oil or Hy-poid gear oil

Recommended gear oil grade:SAE 90 API GL-4

Gear oil quantity:0.250 L (0.264 US qt, 0.220 Imp.qt)

Tightening torque:Spark plug:

17 Nm (1.73 kgf-m, 12.5 ft-lb)Propeller nut:

17 Nm (1.73 kgf-m, 12.5 ft-lb)Engine oil drain bolt:

27 Nm (2.75 kgf-m, 19.9 ft-lb)Engine oil filter:

18 Nm (1.84 kgf-m, 13.3 ft-lb)Noise and vibration level:

Operator sound pressure level (ICOMIA 39/94):

80.3 dB(A)Vibration on tiller handle (ICOMIA 38/94):

F15CEH 2.7 m/s2

F15CMH 2.7 m/s2

F20BEH 2.7 m/s2

F20BMH 2.7 m/s2

F9.9HMH 2.7 m/s2

EMU33555

Installation requirementsEMU33565

Boat horsepower rating

WARNINGEWM01561

Overpowering a boat can cause severeinstability.

Before installing the outboard motor(s), con-firm that the total horsepower of your out-board motor(s) does not exceed the boatsmaximum horsepower rating. See the boat’scapacity plate or contact the manufacturer.



12

EMU33572

Mounting motor

WARNINGEWM01571

Improper mounting of the outboard mo-tor could result in hazardous condi-tions such as poor handling, loss ofcontrol, or fire hazards.

Because the motor is very heavy, spe-cial equipment and training is requiredto mount it safely.

Your dealer or other person experienced inproper rigging should mount the motor usingcorrect equipment and complete rigging in-structions. For further information, see page29.EMU33582

Remote control requirements

WARNINGEWM01581

If the engine starts in gear, the boat canmove suddenly and unexpectedly, pos-sibly causing a collision or throwingpassengers overboard.

If the engine ever starts in gear, thestart-in-gear protection device is notworking correctly and you should dis-continue using the outboard. Contactyour Yamaha dealer.

The remote control unit must be equippedwith a start-in-gear protection device(s). Thisdevice prevents the engine from starting un-less it is in neutral.

EMU25695

Battery requirementsEMU25723

Battery specifications

The engine cannot be started if battery volt-age is too low.EMU36291

Mounting batteryMount the battery holder securely in a dry,well-ventilated, vibration-free location in theboat. WARNING! Do not put flammableitems, or loose heavy or metal objects inthe same compartment as the battery.Fire, explosion or sparks could result.[EWM01821]

EMU36301

Multiple batteriesTo connect multiple batteries, such as formultiple engine configurations or for an ac-cessory battery, consult your Yamaha dealerabout battery selection and correct wiring.EMU44770

Without a rectifier or Rectifier Regulator

NOTICEECM01091

A battery cannot be connected to models

Battery rating (CCA/EN):F15CE 347–411 AF15CEH 347–411 AF15CEP 347–411 AF20BE 347–411 AF20BEH 347–411 AF20BEP 347–411 AF9.9HE 347–411 A

Battery rating (20HR/IEC):F15CE 40 AhF15CEH 40 AhF15CEP 40 AhF20BE 40 AhF20BEH 40 AhF20BEP 40 AhF9.9HE 40 Ah



13

that do not have a rectifier or RectifierRegulator.

If you wish to use a battery with the modelswithout a rectifier or Rectifier Regulator, in-stall an optional Rectifier Regulator.Install an optional Rectifier Regulator or useaccessories rated to withstand 18 volts orhigher with the above models. Consult yourYamaha dealer for details on installing anoptional Rectifier Regulator.EMU34196

Propeller selectionNext to selecting an outboard motor, select-ing the right propeller is one of the most im-portant purchasing decisions a boater canmake. The type, size, and design of your pro-peller have a direct impact on acceleration,top speed, fuel economy, and even enginelife. Yamaha designs and manufactures pro-pellers for every Yamaha outboard motorand every application.Your outboard motor came with a Yamahapropeller selected to perform well over arange of applications, but there may be useswhere a different propeller would be moreappropriate.Your Yamaha dealer can help you select theright propeller for your boating needs. Selecta propeller that will allow the engine to reachthe middle or upper half of the operatingrange at full throttle with the maximum boat-load. Generally, select a larger pitch propel-ler for a smaller operating load and a smallerpitch propeller for a heavier load. If you carryloads that vary widely, select the propellerthat lets the engine run in the proper rangefor your maximum load but remember thatyou may need to reduce your throttle settingto stay within the recommended enginespeed range when carrying lighter loads.To check the propeller, see page 69.

EMU25771

Start-in-gear protectionYamaha outboard motors or Yamaha-ap-proved remote control units are equippedwith start-in-gear protection device(s). Thisfeature permits the engine to be started onlywhen it is in neutral. Always select neutralbefore starting the engine.EMU41953

Engine oil requirementsSelect an oil grade according to the averagetemperatures in the area where the outboardmotor will be used.

1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)

Recommended engine oil:YAMALUBE 4 or 4-stroke outboard motor oil

Recommended engine oil grade 1:SAE 10W-30/10W-40/5W-30 API SE/SF/SG/SH/SJ/SL

Recommended engine oil grade 2:SAE 15W-40/20W-40/20W-50 API SH/SJ/SL

Engine oil quantity (without oil filter replacement):

1.6 L (1.69 US qt, 1.41 Imp.qt)Engine oil quantity (with oil filter re-placement):

1.8 L (1.90 US qt, 1.58 Imp.qt)

ZMU04605

-x1 2 3



14

If oil grades listed under Recommended en-gine oil grade 1 are not available, select analternative oil grade listed under Recom-mended engine oil grade 2.Recommended engine oil grade 1

Recommended engine oil grade 2

EMU36361

Fuel requirementsEMU40202

GasolineUse a good quality gasoline that meets theminimum octane rating. If knocking or ping-ing occurs, use a different brand of gasolineor premium unleaded fuel.

NOTICEECM01982

Do not use leaded gasoline. Leaded

gasoline can seriously damage the en-gine.

Avoid getting water and contaminantsin the fuel tank. Contaminated fuel cancause poor performance or enginedamage. Use only fresh gasoline thathas been stored in clean containers.

GasoholThere are two types of gasohol: gasohol con-taining ethanol (E10) and that containingmethanol. Ethanol can be used if the ethanolcontent does not exceed 10% and the fuelmeets the minimum octane ratings. E85 is afuel containing 85% ethanol and must not beused in your outboard motor. All ethanolblends containing more than 10% ethanolcan cause fuel system damage or cause en-gine starting and running problems. Yamahadoes not recommend gasohol containingmethanol because it can cause fuel systemdamage or engine performance problems.It is recommended that you install a water-separating marine fuel filter assembly (10 mi-cron minimum) between your boat’s fuel tankand outboard motor when using ethanol.Ethanol is known to allow moisture to be ab-sorbed into boat fuel tanks and systems.Moisture in the fuel can cause corrosion ofmetallic fuel system components, startingand running complaints and require addition-al fuel system maintenance.EMU36881

Muddy or acidic waterYamaha strongly recommends that you haveyour dealer install the optional chromium-plated water pump kit if you use the outboardmotor in muddy or acidic water conditions.However, depending on the model it mightnot be required.

Recommended fuel:Regular unleaded gasoline

Min. research octane number (RON):90

ZMU06854

122˚F

50˚C

104

40

86

30

68

SAE API

SESFSGSHSJSL

20

50

10

32

0

14

-10

-4

-20

10W–30

10W–40

5W–30

ZMU06855

122˚F

50˚C

104

40

86

30

68

SAE API

SHSJSL

20

50

10

32

0

14

-10

-4

-20

15W–40

20W–40

20W–50



15

EMU36331

Anti-fouling paintA clean hull improves boat performance. Theboat bottom should be kept as clean of ma-rine growth as possible. If necessary, theboat bottom can be coated with an anti-foul-ing paint approved for your area to inhibitmarine growth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.

EMU36342

Motor disposal requirementsNever illegally discard (dump) the motor.Yamaha recommends consulting the dealerabout discarding the motor.EMU36353

Emergency equipmentKeep the following items onboard in casethere is trouble with the outboard motor. A tool kit with assorted screwdrivers, pli-

ers, wrenches (including metric sizes), andelectrical tape.

Waterproof flashlight with extra batteries. An extra engine shut-off cord (lanyard)

with clip. Spare parts, such as an extra set of spark

plugs.Consult your Yamaha dealer for details.


16

ComponentsEMU2579Z

Components diagramTIP:* May not be exactly as shown; also may not be included as standard equipment on all mod-els (order from dealer).

EMU25804

Fuel tankIf your model was equipped with a portable

ZMU07971

1

2

3

9

8

4

5

6

10

11 12 13

1516

1719

20

21

14

18

26

24

25

7

11

22

171823

20

1. Top cowling2. Cowling lock lever(s)3. Drain screw4. Anti-cavitation plate5. Trim tab6. Propeller7. Cooling water inlet8. Trim rod*9. Clamp bracket10. Manual starter handle*11. Alert indicator12. Gear shift lever*13. Engine stop button/Engine shut-off switch*14. Tiller handle*15. Throttle friction adjuster*

16. Tilt lock lever*17. Clamp screw18. Restraint cable attachment19. Steering friction adjuster*20. Flushing device21. Starter button*22. Power tilt switch*23. Tilt support knob*24. Fuel tank25. Remote control box (side mount type)*26. Clip*


Components

17

fuel tank, its function is as follows.

WARNINGEWM00021

The fuel tank supplied with this engine isits dedicated fuel reservoir and must notbe used as a fuel storage container. Com-mercial users should conform to relevantlicensing or approval authority regula-tions.

EMU25831

Fuel jointThis joint is used to connect the fuel line.EMU25842

Fuel gaugeThis gauge is located on either the fuel tankcap or on the fuel joint base. It shows the ap-proximate amount of fuel remaining in thetank.EMU25851

Fuel tank capThis cap seals the fuel tank. When removed,the tank can be filled with fuel. To remove thecap, turn it counterclockwise.EMU25861

Air vent screwThis screw is on the fuel tank cap. To loosenthe screw, turn it counterclockwise.

EMU26182

Remote control boxThe remote control lever actuates both theshifter and the throttle. The electrical switch-es are mounted on the remote control box.

1. Fuel joint2. Fuel gauge3. Fuel tank cap4. Air vent screw

1. Power tilt switch2. Remote control lever3. Neutral interlock trigger4. Free accelerator5. Main switch6. Engine shut-off switch7. Throttle friction adjuster

1. Remote control lever2. Neutral interlock trigger3. Free accelerator4. Main switch5. Engine shut-off switch6. Throttle friction adjuster

12

3

4

56

ZMU04862


Components

18

EMU26191

Remote control leverMoving the lever forward from the neutral po-sition engages forward gear. Pulling the le-ver back from neutral engages reverse. Theengine will continue to run at idle until the le-ver is moved about 35 (a detent can be felt).Moving the lever farther opens the throttle,and the engine will begin to accelerate.

EMU26202

Neutral interlock triggerTo shift out of neutral, first pull the neutral in-terlock trigger up.

EMU26213

Neutral throttle leverTo open the throttle without shifting into ei-ther forward or reverse, put the remote con-trol lever in the neutral position and lift theneutral throttle lever.

TIP:The neutral throttle lever will operate onlywhen the remote control lever is in neutral.The remote control lever will operate onlywhen the neutral throttle lever is in the closedposition.EMU25914

Tiller handle To change direction, move the tiller handle tothe left or right as necessary.

1. Neutral “ ”2. Forward “ ”3. Reverse “ ”4. Shift5. Fully closed6. Throttle7. Fully open

1. Neutral interlock trigger

1. Fully open2. Fully closed

ZMU01997


Components

19

EMU25925

Gear shift lever Move the gear shift lever forward to engagethe forward gear or rearward to engage thereverse gear.

EMU25943

Throttle grip The throttle grip is on the tiller handle. Turnthe grip counterclockwise to increase speedand clockwise to decrease speed.

EMU25963

Throttle indicator The fuel consumption curve on the throttleindicator shows the relative amount of fuelconsumed for each throttle position. Choosethe setting that offers the best performanceand fuel economy for the desired operation.

EMU25977

Throttle friction adjusterA friction device provides adjustable resis-tance to movement of the throttle grip or theremote control lever, and can be set accord-ing to operator preference.To increase resistance, turn the adjusterclockwise. To decrease resistance, turn theadjuster counterclockwise. WARNING! Donot overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to move the remote control leveror throttle grip, which could result in anaccident. [EWM00033]

1. Forward “ ”2. Neutral “ ”3. Reverse “ ”

ZMU05519

R

F1

23 N

1. Throttle indicator

ZMU05338

1

ZMU05369


Components

20

When constant speed is desired, tighten theadjuster to maintain the desired throttle set-ting.EMU25996

Engine shut-off cord (lanyard) and clipThe clip must be attached to the engine shut-off switch for the engine to run. The cordshould be attached to a secure place on theoperator’s clothing, or arm or leg. Should theoperator fall overboard or leave the helm, thecord will pull out the clip, stopping ignition tothe engine. This will prevent the boat fromrunning away under power. WARNING! At-tach the engine shut-off cord to a secureplace on your clothing, or your arm or legwhile operating. Do not attach the cord toclothing that could tear loose. Do notroute the cord where it could become en-tangled, preventing it from functioning.Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power, theboat could slow rapidly. This could causepeople and objects in the boat to bethrown forward. [EWM00123]

EMU26004

Engine stop button The engine stop button stops the enginewhen the button is pushed.

ZMU05342

1. Cord2. Clip3. Engine shut-off switch


2

1

3

ZMU02003


Components

21

EMU26075

Manual starter handleThe manual starter handle is used to crankand start the engine.

EMU26082

Starter buttonTo start the engine with the electric starter,push the starter button.

EMU26092

Main switchThe main switch controls the ignition system;its operation is described below. “ ” (off)With the main switch in the “ ” (off) posi-tion, the electrical circuits are off, and the keycan be removed. “ ” (on)With the main switch in the “ ” (on) posi-tion, the electrical circuits are on, and the keycannot be removed. “ ” (start)With the main switch in the “ ” (start) po-sition, the starter motor turns to start the en-gine. When the key is released, it returnsautomatically to the “ ” (on) position.

EMU26103

Power tilt switchThe power tilt system adjusts the outboardmotor angle in relation to the transom. Push-ing the switch “ ” (up) tilts the outboard mo-tor up. Pressing the switch “ ” (down) tiltsthe outboard motor down. When the switch isreleased, the outboard motor will stop in itscurrent position.

ZMU02083

ZMU05536

ZMU05521


Components

22

TIP:For instructions on using the power tiltswitch, see pages 46 and 49.EMU31433

Steering friction adjusterA friction device provides adjustable resis-tance to the steering mechanism, and can beset according to operator preference. An ad-juster lever is located on the bottom of the til-ler handle bracket.To increase resistance, turn the lever to theport side “A”.To decrease resistance, turn the lever to thestarboard side “B”.

WARNINGEWM00041

Do not overtighten the friction adjuster. If

there is too much resistance, it could bedifficult to steer, which could result in anaccident.

If the resistance does not increase evenwhen the lever is turned to the port side “A”,make sure that the nut is tightened to thespecified torque.

TIP: Steering movement is blocked when the

adjuster lever is set to the “A” position. Check the tiller handle for smooth move-

ment when the lever is turned to the star-board side “B”.

Do not apply lubricants such as grease tothe friction areas of the steering friction ad-

1. Power tilt switch

1. Power tilt switch

ZMU05626

UP

DN

1

1. Nut

Nut tightening torque:8 Nm (0.82 kgf-m, 5.9 ft-lb)

ZMU05522

A

B

ZMU05523

1


Components

23

juster.EMU26254

Trim tab

WARNINGEWM00841

An improperly adjusted trim tab couldcause difficult steering. Always test runafter the trim tab has been installed or re-placed to be sure steering is correct. Besure you have tightened the bolt after ad-justing the trim tab.

The trim tab should be adjusted so that thesteering control can be turned to either theright or left by applying the same amount offorce.If the boat tends to veer to the left (port side),turn the trim tab rear end to the port side “A”in the figure.If the boat tends to veer to the right (star-board side), turn the trim tab end to the star-board side “B” in the figure.

EMU26263

Trim rod (tilt pin)The position of the trim rod determines theminimum trim angle of the outboard motor in

relation to the transom.

EMU30531

Tilt lock mechanismThe tilt lock mechanism is used to preventthe outboard motor from lifting out of the wa-ter when in reverse gear.

To lock it, set the tilt lock lever in the lock po-

1. Trim tab2. Bolt

Bolt tightening torque:8 Nm (0.82 kgf-m, 5.9 ft-lb)

ZMU05524

1

2

BA

1. Tilt lock lever (Lock / tilt-down)

1. Tilt lock lever (Release / tilt-up)

ZMU05525

ZMU05526

1

ZMU05631

1


Components

24

sition. To release, push the tilt lock lever inthe release position.EMU26322

Tilt support knobTo keep the outboard motor in the tilted upposition, push the tilt support knob under theswivel bracket.

NOTICEECM00661

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tilt sup-port and fall. If the motor cannot betrailered in the normal running position,use an additional support device to se-cure it in the tilt position.

EMU26334

Tilt support barThe tilt support bar keeps the outboard motorin the tilted up position.

NOTICEECM01661

Do not use the tilt support bar whentrailering the boat. The outboard motorcould shake loose from the tilt supportand fall. If the motor cannot be trailered inthe normal running position, use an addi-tional support device to secure it in thetilt position.

EMU26362

Power tilt unitThis unit tilts the outboard motor up anddown and is controlled with the power tiltswitch.

NOTICEECM00631

Do not step on or exert pressure on thepower tilt motor. The power tilt unit couldbe damaged as a result.

NOTICEECM00661

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tilt sup-port and fall. If the motor cannot betrailered in the normal running position,use an additional support device to se-

ZMU04884

ZMU05528

1. Power tilt unit2. Power tilt motor


Components

25

cure it in the tilt position.

EMU26385

Cowling lock lever (pull up type)To remove the engine top cowling, pull upthe cowling lock lever(s) and lift off the cowl-ing. When installing the cowling, check to besure it fits properly in the rubber seal. Thenlock the cowling by moving the cowling locklever(s) downward.

EMU26464

Flushing deviceThis device is used to clean the cooling wa-ter passages of the motor using a gardenhose and tap water.

TIP:For details on usage, see page 58.

EMU26305

Alert indicator If the engine develops a condition which iscause for alert, the indicator lights up. Fordetails on how to read the alert indicator, seepage 27.

1. Flushing device

ZMU05597

1

1. Alert indicator

ZMU05530

1


26

Instruments and indicatorsEMU36016

Indicators EMU36025

Low oil pressure-alert indicatorIf oil pressure drops too low, this indicator willlight up. For further information, see page 27.

NOTICEECM00023

Do not continue to run the engine if thelow oil pressure-alert indicator is onand the engine oil level is lower. Seri-ous engine damage will occur.

The low oil pressure-alert indicatordoes not indicate the engine oil level.Use the oil dipstick to check the re-maining oil quantity. For further infor-mation, see page 34.

EMU36034

Overheat-alert indicatorIf the engine temperature rises too high, thisindicator will light up. For further informationon reading the indicator, see page 27.

NOTICEECM00053

Do not continue to run the engine if theoverheat-alert indicator is on. Serious en-gine damage will occur.

1. Low oil pressure-alert indicator

ZMU06256

1

1. Overheat-alert indicator

ZMU06257

1


27

Engine control systemEMU26804

Alert system

NOTICEECM00092

Do not continue to operate the engine if aalert device has activated. Consult yourYamaha dealer if the problem cannot belocated and corrected.

EMU2681D

Overheat alertThis engine has an overheat-alert device. Ifthe engine temperature rises too high, thealert device will activate. The engine speed will automatically de-

crease to about 2000 r/min. The overheat-alert indicator will light or

blink.

The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).

If the alert system has activated, stop the en-

gine and check the cooling water inlets: Check trim angle to be sure that the cool-

ing water inlet is submerged. Check the cooling water inlet for clogging.

EMU3016C

Low oil pressure alertIf the oil pressure drops too low, the alert de-vice will activate. The engine speed will automatically de-

crease to about 2000 r/min. If equippedwith a low oil pressure-alert indicator, it willlight or blink.

The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).

ZMU05592

ZMU02360

ZMU03026

ZMU05531


Engine control system

28

If the alert system has activated, stop the en-gine as soon as it is safe to do so. Check theoil level and add oil as needed. If the oil levelis correct and the alert device does notswitch off, consult your Yamaha dealer.

ZMU02360


29

InstallationEMU26903

InstallationThe information presented in this section isintended as reference only. It is not possibleto provide complete instructions for everypossible boat and motor combination. Propermounting depends in part on experience andthe specific boat and motor combination.

WARNINGEWM01591

Overpowering a boat could cause se-vere instability. Do not install an out-board motor with more horsepowerthan the maximum rating on the capac-ity plate of the boat. If the boat does nothave a capacity plate, consult the boatmanufacturer.

Improper mounting of the outboard mo-tor could result in hazardous condi-tions such as poor handling, loss ofcontrol, or fire hazards. For permanent-ly mounted models, your dealer or oth-er person experienced in proper riggingshould mount the motor.

EMU32012

Mounting the outboard motor1. Be sure to mount the outboard motor

while the boat is on land. If the boat is onthe water, move it to an area on land.

2. To prevent steering movement, turn theadjuster lever to “A”.

3. Hold the handgrips and steering brack-ets as shown in the illustration and lift upthe outboard motor using two people.

4. Mount the outboard motor on the centerZMU05632

A

1. Steering bracket2. Handgrip

ZMU05633

1

1

2

2

ZMU05634


Installation

30

line (keel line) of the boat, and ensurethat the boat itself is well balanced. Oth-erwise the boat will be hard to steer. Forboats without a keel or which are asym-metrical, consult your dealer.

EMU26926

Mounting heightTo run your boat at optimum efficiency, thewater resistance (drag) of the boat and out-board motor must be made as little as possi-ble. The mounting height of the outboardmotor greatly affects the water resistance. Ifthe mounting height is too high, cavitationtends to occur, thus reducing the propulsion;and if the propeller tips cut the air, the enginespeed will rise abnormally and cause the en-gine to overheat. If the mounting height is toolow, the water resistance will increase andthereby reduce engine efficiency. Mount theoutboard motor so that the anti-cavitationplate is between the bottom of the boat anda level 25 mm (1 in) below it.

NOTICEECM01635

Make sure that the idle hole is highenough to prevent water from enteringthe engine even if the boat is stationarywith the maximum load.

Incorrect engine height or obstructionsto the smooth flow of water (such as thedesign or condition of the boat, or ac-cessories, such as transom ladders ordepth finder transducers) can createairborne water spray while the boat iscruising. If the outboard motor is oper-ated continuously in the presence ofairborne water spray, enough watercould enter the engine through the airintake opening in the top cowling tocause severe engine damage. Removethe cause of the airborne water spray.

TIP: The optimum mounting height of the out-

board motor is affected by the boat andmotor combination and the desired use.Test runs at different heights can help de-termine the optimum mounting height.Consult your Yamaha dealer or boat man-ufacturer for further information on deter-mining the proper mounting height.

For instructions on setting the trim angle ofthe outboard motor, see page 46.

1. Center line (keel line)

ZMU017601


Installation

31

EMU26974

Clamping the outboard motor1. Place the outboard motor on the tran-

som so that it is positioned as close tothe center as possible. Tighten the tran-som clamp screws evenly and securely.Occasionally check the clamp screws fortightness during operation of the out-board motor because they could be-come loose due to engine vibration.WARNING! Loose clamp screwscould allow the outboard motor to falloff or move on the transom. Thiscould cause loss of control and seri-ous injury. Make sure the clampscrews are tightened securely. Occa-sionally check the screws for tight-ness during operation. [EWM00643]

2. If the restraint cable attachment isequipped on your engine, a restraint ca-ble or chain should be used. Attach oneend to the restraint cable attachmentand the other to a secure mounting pointon the boat. Otherwise the engine couldbe completely lost if it accidentally fallsoff the transom.

3. Secure the clamp bracket to the transomusing the bolts provided with the out-board (if packed). For details, consultyour Yamaha dealer. WARNING! Avoidusing bolts, nuts or washers otherthan those contained in the enginepackaging. If used, they must be of atleast the same quality of material andstrength and must be tightened se-curely. After tightening, test run theengine and check their tightness.[EWM00652]

ZMU02012

1. Bolts

ZMU02013

ZMU02637

1


32

OperationEMU36382

First-time operationEMU36393

Fill engine oilThe engine is shipped from the factory with-out engine oil. If your dealer did not fill the oil,you must fill it before starting the engine.NOTICE: Check that the engine is filledwith oil before first-time operation toavoid severe engine damage. [ECM01782]

The engine is shipped with the following tag,which should be removed after engine oil isfilled for the first time. For more informationon checking the engine oil level, see page34.

EMU30175

Breaking in engineYour new engine requires a period of break-in to allow mating surfaces of moving parts towear in evenly. Correct break-in will help en-sure proper performance and longer enginelife. NOTICE: Failure to follow the break-in

procedure could result in reduced enginelife or even severe engine damage. [ECM00802]

EMU27086

Procedure for 4-stroke modelsYour new engine requires a period of 10hours break-in to allow mating surfaces ofmoving parts to wear in evenly.

TIP:Run the engine in the water, under load (ingear with a propeller installed) as follows.For 10 hours for breaking in engine avoid ex-tended idling, rough water and crowded ar-eas.1. For the first hour of operation:

Run the engine at varying speeds up to2000 r/min or approximately half throttle.

2. For the second hour of operation:Increase engine speed as much as nec-essary to put the boat on plane (butavoid full-throttle operation), then backoff on the throttle while keeping the boatat a planing speed.

3. Remaining 8 hours:Run the engine at any speed. However,avoid operating at full throttle for morethan 5 minutes at a time.

4. After the first 10 hours:Operate the engine normally.

EMU36402

Getting to know your boatAll boats have unique handling characteris-tics. Operate cautiously while you learn howyour boat handles under different conditionsand various trim angles (see page 46).EMU36414

Checks before starting engine

WARNINGEWM01922

If any item in “Checks before starting en-gine” is not working properly, have it in-spected and repaired before operatingthe outboard motor. Otherwise, an acci-

ZMU01710


Operation

33

dent could occur.

NOTICEECM00121

Do not start the engine out of water. Over-heating and serious engine damage canoccur.

EMU36561

Fuel levelBe sure you have plenty of fuel for your trip.A good rule is to use 1/3 of your fuel to get tothe destination, 1/3 to return, and to keep 1/3as an emergency reserve. With the boat lev-el on a trailer or in the water, check the fuellevel. For fuel filling instructions, see page36.EMU36573

Remove the top cowlingFor the following checks, remove the topcowling from the bottom cowling. To removethe top cowling, release the cowling lock le-ver and lift off the top cowling.

EMU36443

Fuel system

WARNINGEWM00061

Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other sourc-es of ignition.

WARNINGEWM00911

Leaking fuel can result in fire or explo-sion. Check for fuel leakage regularly. If any fuel leakage is found, the fuel

system must be repaired by a qualifiedmechanic. Improper repairs can makethe outboard unsafe to operate.

EMU36452

Check for fuel leaks Check for fuel leaks or gasoline fumes in

the boat. Check for fuel leakage from the fuel sys-

tem. Check the fuel tank and fuel lines for

cracks, swellings, or other damages.EMU37323

Checking the fuel filterCheck that the fuel filter is clean and free ofwater. If any water is found in the fuel, or if asignificant amount of debris is found, the fueltank should be checked and cleaned by aYamaha dealer.

EMU36903

ControlsTiller handle models: Move the tiller handle fully to the left and

right to make sure operation is smooth. Turn the throttle grip from the fully closed

to the fully open position. Make sure that it

ZMU06169


Operation

34

turns smoothly and that it completely re-turns to the fully closed position.

Look for loose or damaged connections ofthe throttle and shift cables.

Remote control models: Turn the steering wheel full-right and full-

left. Make sure operation is smooth andunrestricted throughout the whole rangewith no binding or excessive free play.

Operate the throttle levers several times tomake sure there is no hesitation in theirtravel. Operation should be smooth overthe complete range of motion, and each le-ver should return completely to the idle po-sition.

Look for loose or damaged connections ofthe throttle and shift cables.

EMU36484

Engine shut-off cord (lanyard)Inspect the engine shut-off cord and clip fordamage, such as cuts, breaks, and wear.

EMU40994

Engine oil1. Place the outboard motor in a vertical

position (not tilted). NOTICE: If the out-board motor is not level, the oil levelindicated on the oil dipstick may notbe accurate. [ECM01862]

2. Remove the oil dipstick and wipe itclean.

3. Insert the oil dipstick completely and re-move it again.

4. Check that the oil level on the oil dipstickis between the upper and lower marks.Consult your Yamaha dealer if the oillevel is not at the proper level or if it ap-



1. Oil dipstick

2

1

3

ZMU02003

ZMU08040

1


Operation

35

pears milky or dirty.

EMU27154

Engine Check the engine and engine mounting. Look for loose or damaged fasteners. Check the propeller for damage. Check for engine oil leaks.EMU36494

Flushing deviceCheck that the flushing device’s garden hoseconnector is securely screwed on to the fit-ting on the bottom cowling. NOTICE: If thegarden hose connector is not properlyconnected, cooling water can leak outand the engine can overheat during oper-ation. [ECM01802]

EMU36956

Install top cowling1. Be sure that the cowling lock lever is re-

leased.2. Be sure that the rubber seal is seated all

the way around the top cowling.3. Place the top cowling on the bottom

cowling.4. Check to be sure the rubber seal is seat-

ed correctly between the top cowlingand the bottom cowling.

5. Move the cowling lock lever to lock thetop cowling as shown. NOTICE: If thetop cowling is not installed correctly,water spray under the top cowlingcan damage the engine, or the topcowling can blow off at high speeds.[ECM01992]

After installing, check the fitting of the topcowling by pushing it with both hands. If thetop cowling is loose, have it repaired by yourYamaha dealer.

1. Lower mark2. Oil dipstick3. Upper mark

1. Fitting

2

1

3

ZMU08041

ZMU06172

2

1

2. Flushing device

ZMU06136


Operation

36

EMU34783

Checking power tilt system

WARNINGEWM01971

Never get under the lower unit while itis tilted, even when the tilt supportknob is locked. Severe injury could oc-cur if the outboard motor accidentallyfalls.

Body parts can be crushed between themotor and the clamp bracket when themotor is trimmed or tilted.

Be sure no one is near the outboardmotor before performing this check.

1. Check the power tilt unit for any sign ofoil leaks.

2. Operate each of the power tilt switchesto check that all switches work.

3. Tilt the outboard motor up and check

that the tilt rod is pushed out completely.4. Check that the tilt rod is free of corrosion

or other flaws.5. Tilt the outboard motor down. Check that

the tilt rod operates smoothly.EMU36583

BatteryCheck that the battery is in good condition,and fully charged. Check that the batteryconnections are clean, secure and coveredby insulating covers. The electrical contactsof the battery and cables must be clean andproperly connected or the battery will notstart the engine.Refer to the battery manufacturer’s instruc-tions for checks for your particular battery.EMU2743A

Filling fuel

WARNINGEWM01831

Gasoline and its vapors are highly flam-mable and explosive. Always refuel ac-cording to this procedure to reduce therisk of fire and explosion.

Gasoline is poisonous and can causeinjury or death. Handle gasoline withcare. Never siphon gasoline by mouth.If you should swallow some gasoline orinhale a lot of gasoline vapor, or getsome gasoline in your eyes, see yourdoctor immediately. If gasoline spillson your skin, wash with soap and wa-ter. If gasoline spills on your clothing,change your clothes.

1. Be sure the engine is stopped.2. Disconnect the fuel line from the fuel

tank and tighten the air vent screw onthe fuel tank cap.

1. Tilt rod


Operation

37

3. Remove the portable tank from the boat.4. Be sure you are in a well-ventilated out-

door area, either securely moored ortrailered.

5. Do not smoke and keep away fromsparks, flames, static electric discharge,or other sources of ignition.

6. If you use a portable container to storeand dispense fuel, use only an approvedGASOLINE container.

7. Touch the fuel nozzle to the filler open-ing or funnel to help prevent electrostaticsparks.

8. Fill the fuel tank, but do not overfill.WARNING! Do not overfill. Otherwisefuel can expand and overflow if thetemperature increases. [EWM02611]

9. Tighten the filler cap securely.10. Wipe up any spilled gasoline immediate-

ly with dry rags. Dispose rags properlyaccording to local laws or regulations.

EMU27453

Operating engine

WARNINGEWM00421

Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in thewater near you.

When the air vent screw is loosened,gasoline vapor will be released. Gaso-line is highly flammable, and its vaporsare flammable and explosive. Refrainfrom smoking, and keep away fromopen flames and sparks while loosen-ing the air vent screw.

This product emits exhaust gaseswhich contain carbon monoxide, a col-orless, odorless gas which could causebrain damage or death when inhaled.Symptoms include nausea, dizziness,and drowsiness. Keep cockpit and cab-in areas well ventilated. Avoid blockingexhaust outlets.

EMU27469

Sending fuel (portable tank)1. If there is an air vent screw on the fuel

Fuel tank capacity:25 L (6.60 US gal, 5.50 Imp.gal)

ZMU06598

ZMU02041

ZMU04047


Operation

38

tank cap, loosen it 2 or 3 turns.

2. If there is a fuel joint on the motor, alignthe fuel joint on the fuel line with the fueljoint on the motor and firmly connect thefuel line to the joint while pinching thejoint. Then firmly connect the other endof the fuel line to the joint on the fueltank.

TIP:Wipe up any spilled gasoline immediatelywith dry rags. Dispose rags properly accord-

ing to local laws or regulations.3. Squeeze the primer pump, with the ar-

row pointing up, until you feel it becomefirm. During engine operation place thetank horizontally, otherwise fuel cannotbe drawn from the fuel tank.

EMU27495

Starting engine

WARNINGEWM01601

Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in the wa-ter near you.

EMU39014

Manual start/prime start models

WARNINGEWM01842

Failure to attach the engine shut-offcord could result in a runaway boat ifoperator is ejected. Attach the engineshut-off cord to a secure place on yourclothing, or your arm or leg while oper-ating. Do not attach the cord to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it from functioning.

Avoid accidentally pulling the cord dur-

ZMU02022

ZMU05532

ZMU02024

1. Arrow


Operation

39

ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

Starting procedure (cold engine)1. Place the gear shift lever in neutral.

TIP:The start-in-gear protection device preventsthe engine from starting except when in neu-tral.2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your armor leg. Then install the clip on the otherend of the cord into the engine shut-offswitch.

3. Place the throttle grip in the “ ”(start) position.

4. Pull the manual starter handle slowly un-til you feel resistance. Then give astrong pull straight out to crank and startthe engine. Repeat if necessary.

5. After the engine starts, slowly return themanual starter handle to its original posi-tion before releasing it.

TIP:When the engine is cold, it needs to bewarmed up. For further information, seepage 43.6. Slowly return the throttle grip to the fully

closed position.Starting procedure (warm engine)1. Place the gear shift lever in neutral.

ZMU05533

N

ZMU02026

ZMU06522

ZMU05536


Operation

40



3. Open the throttle grip as shown in the il-lustration.

TIP: If the throttle is opened too much, the en-

gine speed rises rapidly, causing the out-board motor to swivel toward the starboardside.

Do not repeat opening and closing of thethrottle grip as this cause the spark plug towet with fuel and prevent from the engineto start.

4. Hold this throttle grip position by tighten-ing the throttle friction adjuster.

5. Pull the manual starter handle slowly un-til you feel resistance. Then give astrong pull straight out to crank and startthe engine. Repeat if necessary.

6. After the engine starts, slowly return themanual starter handle to its original posi-tion before releasing it.

7. Loosen the throttle friction adjuster andreturn the throttle to the fully closed po-sition. WARNING! Loosen the throttle

ZMU05533

N

ZMU02026

ZMU06609

ZMU06608

ZMU05536


Operation

41

friction adjuster. If there is too muchresistance, it could be difficult tomove the throttle grip, which couldresult in an accident. [EWM02251]

EMU27606

Electric start/prime start models

WARNINGEWM01842


Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

1. Place the gear shift lever in neutral.


cure place on your clothing, or your arm

or leg. Then install the clip on the otherend of the cord into the engine shut-offswitch.

3. Place the throttle grip in the “ ”(start) position. After the engine starts,return the throttle to the fully closed po-sition.

4. Push the starter button to start the en-gine.

5. Immediately after the engine starts, re-lease the starter button and allow it to re-

ZMU05533

N

ZMU02026

ZMU06522

ZMU05538


Operation

42

turn to its original position. NOTICE:Never push the starter button whilethe engine is running. Do not keepthe starter motor turning for morethan 5 seconds. If the starter motor isturned continuously for more than 5seconds, the battery will be quicklydischarged, thus making it impossi-ble to start the engine. The starter canalso be damaged. If the engine willnot start after 5 seconds of cranking,release the starter button, wait 10seconds, then crank the engineagain. [ECM00162]

TIP: When the engine is cold, it needs to be

warmed up. For further information, seepage 43.

If the engine is warm and fails to start,open the throttle slightly and try to start theengine again. If the engine still fails tostart, see page 75.

6. Slowly return the throttle grip to the fullyclosed position.

EMU27666

Electric start and remote control models

WARNINGEWM01842


Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,

the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

1. Place the remote control lever in neutral.



3. Turn the main switch to “ ” (on).4. Turn the main switch to “ ” (start),

and hold it for a maximum of 5 seconds.


Operation

43

5. Immediately after the engine starts, re-lease the main switch and allow it to re-turn to “ ” (on). NOTICE: Never turnthe main switch to “ ” (start)while the engine is running. Do notkeep the starter motor turning formore than 5 seconds. If the startermotor is turned continuously formore than 5 seconds, the battery willbe quickly discharged, thus making itimpossible to start the engine. Thestarter can also be damaged. If theengine will not start after 5 secondsof cranking, return the main switch to“ ” (on), wait 10 seconds, thencrank the engine again. [ECM00193]

TIP: When the engine is cold, it needs to be

warmed up. For further information, seepage 43.

If the engine is warm and fails to start,open the throttle slightly and try to start theengine again. If the engine still fails tostart, see page 75.

EMU36511

Checks after starting engineEMU36524

Cooling waterCheck for a steady flow of water from thecooling water pilot hole. A continuous flow ofwater from the pilot hole indicates that the

water pump is pumping water through thecooling water passages. If the cooling waterpassages are frozen, it may take a while forwater to start flowing out of the pilot hole.

NOTICEECM01811

If water is not flowing out of the pilot holeat all times while the engine is running,overheating and serious damage couldoccur. Stop the engine and check wheth-er the cooling water inlet on the lowercase or the cooling water pilot hole isblocked. Consult your Yamaha dealer ifthe problem cannot be located and cor-rected.

EMU27671

Warming up engineEMU27717

Manual start and electric start models1. After starting the engine, allow it to idle

for 3 minutes to warm up. Failure to doso will shorten engine life.

2. Be sure the low oil pressure-alert indica-tor goes off after starting the engine.NOTICE: If the low oil pressure-alertindicator blinks after the enginestarts, stop the engine. Otherwise,serious engine damage could occur.Check the oil level and add engine oil


Operation

44

if necessary. Consult your Yamahadealer if the cause for the low oilpressure alert cannot be found.[ECM01832]

EMU36532

Checks after engine warm upEMU36542

ShiftingWhile the boat is tightly moored, and withoutapplying throttle, confirm that the engineshifts smoothly into forward and reverse, andback to neutral.EMU36981

Stop switches Turn the main switch to “ ”, or press the

engine stop button and make sure the en-gine stops.

Confirm that removing the clip from the en-gine shut-off switch stops the engine.

Confirm that the engine cannot be startedwith the clip removed from the engineshut-off switch.

EMU34563

Shifting

WARNINGEWM00181

Before shifting, make sure there are noswimmers or obstacles in the water nearyou.

NOTICEECM01611

Warm up the engine before shifting intogear. Until the engine is warm, the idlespeed may be higher than normal. Highidle speed can prevent you from shiftingback to neutral. If this occurs, stop theengine, shift to neutral, then restart theengine and allow it to warm up.

To shift out of neutral1. Pull the neutral interlock trigger up (if

equipped).

2. Move the remote control lever / gearshift lever firmly and crisply forward (forforward gear) or backward (for reversegear) [about 35 (a detent can felt) for re-mote control models]. Be sure to checkthat the tilt lock lever is in the lock/downposition (if equipped) before operating inreverse.

1. Neutral interlock trigger

ZMU05541


Operation

45

TIP:Tiller handle models: The gear shift lever op-erates only when the throttle grip is in the ful-ly closed position.To shift from in gear (forward/reverse) toneutral1. Close the throttle so that the engine

slows to idle speed.

2. After the engine is at idle speed in gearmove the remote control lever / gearshift lever firmly and crisply into the neu-

tral position.

EMU31743

Stopping boat

WARNINGEWM01511

Do not use the reverse function to slowdown or stop the boat as it could causeyou to lose control, be ejected, or im-pact the steering wheel or other parts ofthe boat. This could increase the risk ofserious injury. It could also damage theshift mechanism.

Do not shift into reverse while travelingat planing speeds. Loss of control, boatswamping, or damage to the boat couldoccur.

The boat is not equipped with a separatebraking system. Water resistance stops it af-ter the throttle lever is moved back to idle.The stopping distance varies depending ongross weight, water surface conditions, and

ZMU05729

R

F

N

ZMU06652

ZMU05533

N


Operation

46

wind direction.EMU27822

Stopping engineBefore stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-ping the engine immediately after operatingat high speed is not recommended.EMU27848

Procedure1. Push and hold the engine stop button or

turn the main switch to “ ” (off).

2. After stopping the engine, disconnectthe fuel line if there is a fuel joint on theoutboard motor.

3. Tighten the air vent screw on the fueltank cap (if equipped).

4. Remove the key if the boat will be left un-attended.

TIP:The engine can also be stopped by pullingthe cord and removing the clip from the en-gine shut-off switch, then turning the mainswitch to “ ” (off).EMU27865

Trimming outboard motor

WARNINGEWM00741

Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can makesteering the boat more difficult. This in-creases the possibility of an accident. Ifthe boat begins to feel unstable or is hardto steer, slow down and/or readjust the

ZMU02083

ZMU05547

ZMU02041


Operation

47

trim angle.

The trim angle of the outboard motor helpsdetermine the position of the bow of the boatin the water. Correct trim angle will help im-prove performance and fuel economy whilereducing strain on the engine. Correct trimangle depends upon the combination ofboat, engine, and propeller. Correct trim isalso affected by variables such as the load inthe boat, sea conditions, and running speed.

EMU27873

Adjusting trim angle for manual tilt modelsThere are 4 or 5 holes provided in the clampbracket to adjust the outboard motor trim an-gle.1. Stop the engine.2. Tilt the outboard motor up, and then re-

move the trim rod from the clamp brack-et.

3. Reposition the rod in the desired hole.To raise the bow (“trim-out”), move the rodaway from the transom.To lower the bow (“trim-in”), move the rod to-ward the transom.Make test runs with the trim set to differentangles to find the position that works best foryour boat and operating conditions.

WARNINGEWM00401

Stop the engine before adjusting thetrim angle.

Use care to avoid being pinched whenremoving or installing the rod.

Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control.

TIP:The outboard motor trim angle can bechanged approximately 4 degrees by shiftingthe trim rod one hole.EMU27906

Adjusting trim angle (power tilt models)

WARNINGEWM00754

Be sure all people are clear of the out-

1. Trim operating angle

1. Trim rod

ZMU05601

1


Operation

48

board motor when adjusting the trimangle. Body parts can be crushed be-tween the motor and the clamp bracketwhen the motor is trimmed or tilted.

Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control.

If equipped with a power trim and tiltswitch located on the bottom cowling,use the switch only when the boat is ata complete stop with the engine off. Donot adjust the trim angle with thisswitch while the boat is moving.

1. Move the gear shift lever to the neutralposition.

TIP:While the boat is moving, it may be difficult toadjust the trim angle due to water pressure.Before adjusting the trim angle, reduce theboat speed and shift into neutral.2. Tilt the outboard motor to the desired an-

gle using the power tilt switch.

To raise the bow (“trim-out”), tilt the outboardmotor up.To lower the bow (“trim-in”), tilt the outboardmotor down.Make test runs with the trim set to differentangles to find the position that works best for

your boat and operating conditions.

TIP:Stay within the trim operating angle whentrimming the outboard motor using the powertilt system.EMU27913

Adjusting boat trimWhen the boat is on plane, a bow-up attituderesults in less drag, greater stability and effi-ciency. This is generally when the keel line ofthe boat is up about 3 to 5 degrees. With thebow up, the boat may have a greater tenden-cy to steer to one side or the other. Compen-sate for this as you steer. When the bow ofthe boat is down, it is easier to acceleratefrom a standing start onto plane.

Bow UpToo much trim-out puts the bow of the boattoo high in the water. Performance and econ-omy are decreased because the hull of theboat is pushing the water and there is moreair drag. Excessive trim-out can also causethe propeller to ventilate, which reduces per-formance further, and the boat may “por-poise” (hop in the water), which could throwthe operator and passengers overboard.


Operation

49

Bow DownToo much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Oper-ating with excessive trim-in at higher speedsalso makes the boat unstable. Resistance atthe bow is greatly increased, heightening thedanger of “bow steering” and making opera-tion difficult and dangerous.

TIP:Depending on the type of boat, the outboardmotor trim angle may have little effect on thetrim of the boat when operating.EMU27936

Tilting up and downIf the engine will be stopped for some time orif the boat is moored in shallows, the out-board motor should be tilted up to protect thepropeller and lower casing from damage bycollision with obstructions, and also to re-duce salt corrosion.

WARNINGEWM00223

Make sure that no one is near the out-board motor when tilting the outboardmotor up or down. Otherwise, body partscould be crushed between the outboardmotor and the clamp bracket.

WARNINGEWM00251

Leaking fuel is a fire hazard. If there is afuel joint on the outboard motor, discon-nect the fuel line or close the fuel cock ifthe engine will be tilted for more than afew minutes. Otherwise fuel may leak.

NOTICEECM00242

Before tilting the outboard motor, stopthe engine by following the procedureon page 46. Never tilt the outboard mo-tor while the engine is running. Severedamage from overheating can result.

Do not tilt up the engine by pushing thetiller handle (if equipped) because thiscould break the handle.

EMU2797C

Procedure for tilting up (manual tilt models)1. Place the remote control lever / gear

shift lever in neutral.

N

ZMU03087


Operation

50

2. Disconnect the fuel line from the out-board motor.

3. Place the tilt lock lever (if equipped) inthe release/up position.

4. Pull up the shallow water lever (ifequipped).

5. Hold the rear of the top cowling with onehand and tilt the engine up fully.

6. Push the tilt support knob into the clampbracket. Or the tilt support bar will turn tothe lock position automatically.

NOTICE: Do not use the tilt supportlever or knob when trailering theboat. The outboard motor couldshake loose from the tilt support andfall. If the motor cannot be trailered inthe normal running position, use anadditional support device to secure itin the tilt position. For more detailedinformation, see page 55. [ECM01642]

EMU44610

Procedure for tilting up (power tilt models)1. Place the remote control lever in neutral.

2. Press the power tilt switch “ ” (up) untilthe outboard motor has tilted up com-pletely.

ZMU05533

N

ZMU05547

ZMU05548

ZMU05528


Operation

51

3. Push the tilt support knob into the clampbracket to support the engine.WARNING! After tilting the outboardmotor, be sure to support it with thetilt support knob or tilt support lever.Otherwise the outboard motor couldfall back down suddenly if oil in thepower trim and tilt unit or in the pow-er tilt unit loses pressure. [EWM00263]

NOTICE: Do not use the tilt supportlever or knob when trailering theboat. The outboard motor couldshake loose from the tilt support andfall. If the motor cannot be trailered inthe normal running position, use anadditional support device to secure itin the tilt position. For more detailedinformation, see page 55. [ECM01642]

EMU30193

Procedure for tilting down (manual tilt models)1. Place the tilt lock lever in the lock posi-

tion.

2. Slightly tilt the engine up until the tilt sup-port bar is automatically released.

3. Slowly tilt the engine down.

ZMU05580

UP

ZMU04884

ZMU05541

ZMU05528


Operation

52

EMU44620

Procedure for tilting down (power tilt models)1. Push the power tilt switch “ ” (up) until

the outboard motor is supported by thetilt rod and the tilt support knob becomesfree.

2. Pull out the tilt support knob.

3. Push the power tilt switch “ ” (down) tolower the outboard motor to the desiredposition.

EMU28063

Shallow water EMU28074

Cruising in shallow water (manual tilt models)

WARNINGEWM01782

Run the boat at the lowest possiblespeed when using the shallow watercruising system. The tilt lock mecha-nism does not work while the shallowwater cruising system is being used.Hitting an underwater obstacle couldcause the outboard motor to lift out ofthe water, resulting in loss of control.

Use extra care when operating in re-verse. Too much reverse thrust cancause the outboard motor to lift out ofthe water, increasing the chance of ac-cident and personal injury.

NOTICEECM00261

Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-ing can result.

EMU28126

Procedure1. Place the remote control lever / gear

ZMU04886

DN

ZMU01936

UP

DN

ZMU05581

DN


Operation

53

shift lever in neutral.

2. Place the tilt lock lever in the release/upposition.

3. Slightly tilt the outboard motor up. Thetilt support bar will lock automatically,supporting the outboard motor in a par-tially raised position. This outboard mo-tor has 2 positions for shallow watercruising.

4. To return the outboard motor to the nor-mal running position, place the remote

control lever / gear shift lever in neutral.5. Place the tilt lock lever in the lock/down

position, then slightly tilt the outboardmotor up until the tilt support bar auto-matically returns to the free position.

6. Slowly lower the outboard motor to thenormal position.

EMU32862

Power tilt modelsThe outboard motor can be tilted up partiallyto allow operation in shallow water.

NOTICEECM00261

Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-ing can result.

EMU32953

Procedure for power tilt models1. Place the remote control lever in neutral.

N

ZMU03087

ZMU05533

N

ZMU05548

ZMU05541


Operation

54

2. Slightly tilt the outboard motor up to thedesired position using the power tiltswitch. WARNING! Using the powertilt switch on the bottom cowlingwhile the boat is moving or engine ison could increase the risk of fallingoverboard and could distract the op-erator, increasing the risk of collisionwith another boat or an obstacle.[EWM01961]

3. To return the outboard motor to the nor-mal running position, press the power tiltswitch and slowly tilt the outboard motordown.

EMU28196

Cruising in other conditionsCruising in salt waterAfter operating in salt water, flush the coolingwater passages with fresh water to preventthem from becoming clogged. Also rinse theoutside of the outboard motor with fresh wa-

ter.Cruising in muddy, turbid, or acidic waterYamaha strongly recommends that you usethe optional chromium-plated water pump kit(see page 14) if you use the outboard motorin acidic water or water with a lot of sedimentin it, such as muddy or turbid (cloudy) water.After operating in such water, flush the cool-ing passages with fresh water to prevent cor-rosion. Also rinse the outside of the outboardmotor with fresh water.

UP

ZMU01935

UP

DN


55

MaintenanceEMU2822B

Transporting and storing outboard motor

WARNINGEWM02621

USE CARE when transporting fuel tank,whether in a boat or car.

DO NOT fill fuel container to maximumcapacity. Gasoline will expand consid-erably as it warms up and can build uppressure in the fuel container. This cancause fuel leakage and a potential firehazard.

Leaking fuel is a fire hazard. Whentransporting and storing the outboardmotor, disconnect the fuel line from theoutboard motor to prevent fuel fromleaking.

Never get under the outboard motorwhile it is tilted. Severe injury could oc-cur if the outboard motor accidentallyfalls.

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tiltsupport and fall. If the outboard motorcannot be trailered in the normal run-ning position, use an additional sup-port device to secure it in the tiltposition.

NOTICEECM02441

When storing the outboard motor for pro-longed time, fuel must be drained fromthe fuel tank. The deteriorated fuel couldclog the fuel line causing engine start dif-ficulty or malfunction.

When storing or transporting the outboardmotor, make sure to follow the procedure list-ed below.

Disconnect the fuel line from the outboardmotor.

Tighten the fuel tank cap and its air ventscrew.

When the outboard motor is tilted pro-longed time for mooring or trailering theboat, disconnect the fuel line from the out-board motor. Tighten the fuel tank cap andits air vent screw.

The outboard motor should be transportedand stored in the normal running position. Ifthere is insufficient road clearance in this po-sition, then trailer the outboard motor in thetilt position using a motor support devicesuch as a transom saver bar. Consult yourYamaha dealer for further details.EMU32031

Dismounting the outboard motor1. Stop the engine and land the boat.2. Disconnect the fuel line from the out-

board motor.3. For electric start models, disconnect the

battery cables from the battery termi-nals.

4. To prevent steering movement, turn theadjuster lever to “A”.

5. Loosen the clamp screw(s).6. Hold the handgrips and steering brack-

ets as shown in the illustration and lift upthe outboard motor to dismount it fromthe boat.

ZMU05632

A


Maintenance

56

7. When transporting or storing the out-board motor while removed from a boat,keep the outboard motor in the attitudeshown.

TIP:Place a towel or something similar under theoutboard motor to protect it from damage.EMU28242

Storing outboard motorWhen storing your Yamaha outboard motorfor prolonged periods of time (2 months orlonger), several important procedures mustbe performed to prevent excessive damage.It is advisable to have your outboard motorserviced by an authorized Yamaha dealerprior to storage. However, you, the owner,with a minimum of tools, can perform the fol-lowing procedures.

NOTICEECM01081

To prevent problems which can becaused by oil entering the cylinder fromthe sump, keep the outboard motor inthe attitude shown when transportingand storing it. If storing or transportingthe outboard motor on its side (not up-

1. Steering bracket2. Handgrip

ZMU05633

1

1

2

2

ZMU05634

ZMU05630


Maintenance

57

right), put it on a cushion after drainingthe engine oil.

Do not place the outboard motor on itsside before the cooling water hasdrained from it completely, otherwisewater may enter the cylinder throughthe exhaust port and cause engine trou-ble.

Store the outboard motor in a dry, well-ventilated place, not in direct sunlight.

EMU28306

ProcedureEMU32027

Flushing in a test tank

NOTICEECM00302

Before starting the engine, make sure tosupply water to the cooling water passag-es. Otherwise, the engine could overheatand be damaged.

1. Dismount the outboard motor from theboat. For further details, see page 55.

2. Wash the outboard motor body usingfresh water. NOTICE: Do not spray wa-ter into the air intake. [ECM01841] For fur-ther information, see page 59.

3. Disconnect the fuel line from the out-board motor.

4. Remove the top cowling and silencercover/cap, if equipped. Remove the pro-peller. For further details, see page 70.

5. Position the outboard motor on a watertank. For further details, see page 29.

6. Fill the tank with fresh water until theanti-cavitation plate is immersed in wa-ter. NOTICE: If the fresh water level isbelow the level of the anti-cavitationplate, or if the water supply is insuffi-cient, engine seizure may occur.[ECM00292]

7. Cooling system flushing is essential toprevent the cooling system from clog-ging up with salt, sand, or dirt. In addi-tion, fogging/lubricating of the engine ismandatory to prevent excessive enginedamage due to rust. Perform the flush-ing and fogging at the same time.WARNING! Do not touch or removeelectrical parts when starting or dur-ing operation. Keep hands, hair, andclothes away from the flywheel andother rotating parts while the engineis running. [EWM00092]

8. Run the engine at a fast idle for a fewminutes in neutral position.

9. Just prior to turning off the engine, quick-ly spray “Fogging Oil” alternately intoeach carburetor or the fogging hole ofthe silencer cover, if equipped. Whenproperly done, the engine will smoke ex-cessively and almost stall.

10. Remove the outboard motor from thetest tank.

11. Install the silencer cover/cap of fogginghole (if equipped) and top cowling.

12. If the “Fogging Oil” is not available, runthe engine at a fast idle until the fuel sys-tem becomes empty and the engine

1. Water surface2. Lowest water level

ZMU02051

1

2


Maintenance

58

stops.13. Drain the cooling water completely out of

the motor. Clean the body thoroughly.14. If the “Fogging Oil” is not available, re-

move the spark plug(s). Pour a tea-spoonful of clean engine oil into eachcylinder. Crank several times manually.Replace the spark plug(s).

15. Drain the fuel from the fuel tank.16. Store the fuel tank in a dry, well-ventilat-

ed place, not in direct sunlight.EMU41072

Lubrication1. Change the gear oil. For instructions,

see page 71. Check the gear oil for thepresence of water that indicates a leakyseal. Seal replacement should be per-formed by an authorized Yamaha dealerprior to use.

2. Lubricate all grease fittings. For furtherdetails, see page 64.

TIP:For long-term storage, fogging the enginewith fogging oil is recommended. Contactyour Yamaha dealer for information aboutfogging oil and procedures for your outboardmotor.EMU28446

Flushing power unitPerform this procedure right after operationfor the most thorough flushing.

NOTICEECM01531

Do not perform this procedure while theengine is running. The water pump maybe damaged and severe damage fromoverheating can result.

1. After shutting off the engine, unscrewthe garden hose connector from the fit-ting on the bottom cowling.

2. Screw the garden hose adapter onto agarden hose, which is connected to afresh water supply, and then connect itto the garden hose connector.

3. With the engine off, turn on the water tapand let the water flush through the cool-ing passages for about 15 minutes. Turnoff the water and disconnect the gardenhose adapter from the garden hose con-nector.

4. Reinstall the garden hose connectoronto the fitting on the bottom cowling.Tighten the connector securely.NOTICE: Do not leave the gardenhose connector loose on the bottomcowling fitting or let the hose hangfree during normal operation. Water

1. Fitting2. Garden hose connector3. Garden hose adapter

ZMU05556

1

32


Maintenance

59

will leak out of the connector insteadof cooling the engine, which cancause serious overheating. Be surethe connector is tightened securelyon the fitting after flushing the en-gine. [ECM00542]

TIP: When flushing the engine with the boat in

the water, tilting up the outboard motor un-til it is completely out of the water willachieve better results.

For cooling system flushing instructions,see page 55.

EMU44342

Cleaning the outboard motorWhen cleaning the outboard motor, the topcowling must be installed.1. Wash the exterior of the outboard motor

using fresh water. NOTICE: Do notspray water into the air intake. [ECM01841]

2. Drain the cooling water completely out ofthe outboard motor. Clean the body thor-oughly.

EMU28462

Checking painted surface of outboard motorCheck the outboard motor for scratches,nicks, or flaking paint. Areas with damagedpaint are more likely to corrode. If necessary,

clean and paint the areas. A touch-up paint isavailable from your Yamaha dealer.EMU37004

Periodic maintenance

WARNINGEWM01943

These procedures require mechanicalskills, tools, and supplies. If you do nothave the proper skills, tools, or suppliesto perform a maintenance procedure,have a Yamaha dealer or other qualifiedmechanic do the work.The procedures involve disassemblingthe motor and exposing dangerous parts.To reduce the risk of injury from moving,hot, or electrical parts: Turn off the engine and keep the key(s)

and engine shut-off cord (lanyard) withyou when you perform maintenance un-less otherwise specified.

The power tilt switch operate evenwhen the ignition key is off. Keep peo-ple away from the switches wheneverworking around the motor. When themotor is tilted, keep away from the areaunder it or between it and the clampbracket. Be sure no one is in this areabefore operating the power tilt mecha-nism.

Allow the engine to cool before han-dling hot parts or fluids.

Always completely reassemble the mo-tor before operation.

EMU28512

Replacement partsIf replacement parts are necessary, use onlygenuine Yamaha parts or parts of equivalentdesign and quality. Any part of inferior qualitymay malfunction, and the resulting loss ofcontrol could endanger the operator andpassengers. Yamaha genuine parts and ac-

1. Air intake

1

ZMU07873


Maintenance

60

cessories are available from your Yamahadealer.EMU34152

Severe operating conditionsSevere operating conditions involve one ormore of the following types of operation on aregular basis: Operating continuously at or near maxi-

mum engine speed (rpm) for many hours Operating continuously at a low engine

speed (rpm) for many hours Operating without sufficient time for engine

to warm up and cool down Frequent quick acceleration and decelera-

tion Frequent shifting Frequently starting and stopping the en-

gine(s) Operation that fluctuates often between

light and heavy cargo loadsOutboard motors operating under any ofthese above conditions require more fre-quent maintenance. Yamaha recommendsthat you do this service twice as often asspecified in the maintenance chart. For ex-ample, if a particular service should be doneat 50 hours, do it instead at 25 hours. Thiswill help prevent more rapid deterioration ofengine components.


Maintenance

61

EMU46071

Maintenance chart 1TIP: Refer to the sections in this chapter for explanations of each owner-specific action. The maintenance cycle on these charts assume usage of 100 hours per year and regular

flushing of the cooling water passages. Maintenance frequency should be adjusted whenoperating the engine under adverse conditions such as extended trolling.

Disassembly or repairs may be necessary depending on the outcome of maintenancechecks.

Expendable or consumable parts and lubricants will lose their effectiveness over time andthrough normal usage regardless of the warranty period.

When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine shouldbe flushed with clean water after each use.

The “ ” symbol indicates the check-ups which you may carry out yourself.The “ ” symbol indicates work to be carried out by your Yamaha dealer.

Item Actions

Initial Every

Page20 hours (3 months)

100 hours (1 year)

300 hours (3 years)

500 hours (5 years)

Anode(s) (external)Inspection or replacement as necessary

73

Anode(s) (internal) *1

Inspection or replacement as necessary

—

Anode(s) (internal) *2

Replacement —

Battery (electro-lyte level, terminal)

Inspection 73

Battery (electro-lyte level, terminal)

Fill, charging or replacing as nec-essary

—

Cooling water leak-age


—

Cowling lock lever Inspection 33, 35

Engine starting condition/noise

Inspection 37

Engine idle speed/noise

Inspection 66

Engine oil Replacement 67

Engine oil filter (cartridge)

Replacement —


Maintenance

62

Fuel filter (can be disassembled)


33

Fuel line Inspection —

Fuel lineInspection or replacement as necessary

—

Fuel pump Inspection or replacement as necessary

—

Fuel/engine oil leakage

Inspection —

Gear oil Replacement 71

Greasing points Greasing 64

Clamp bracket bolt (through tube)

Inspection and greasing

—

Impeller/water pump housing


—

Impeller/water pump housing

Replacement —

Power tilt unit Inspection 36

Propeller/propeller nut/cotter pin


69

Shift link/shift cableInspection, adjust-ment or replace-ment as necessary

—

Spark plug(s)Inspection or replacement as necessary

65

Spark plug caps/spark plug wires


—

Water from the cooling water pilot hole

Inspection 43

Throttle link/throt-tle cable

Inspection, adjust-ment or replace-ment as necessary

—

Item Actions

Initial Every


100 hours (1 year)

300 hours (3 years)

500 hours (5 years)


Maintenance

63

EMU46230

*1 cylinder head, thermostat cover*2 exhaust cover, cooling water passage cover, Rectifier Regulator coverEMU46080

Maintenance chart 2

ThermostatInspection or replacement as necessary

—

Timing beltInspection or replacement as necessary

—

Valve clearanceInspection and adjustment

—

Cooling water inlet Inspection 16

Main switch/stop switch


—

Wire harness con-nections/wire cou-pler connections


—

Fuel tank (Yamaha portable tank)

Inspection and cleaning as neces-sary

—

Item ActionsEvery

Page1000 hours

Exhaust guide/exhaust manifold


—

Timing belt Replacement —

Item Actions

Initial Every


100 hours (1 year)

300 hours (3 years)

500 hours (5 years)


Maintenance

64

EMU28945

GreasingYamaha grease A (water resistant grease)Yamaha grease D (corrosion resistant grease; for propeller shaft)F9.9HMH, F15CEH, F15CMH, F20BEH, F20BMH

ZMU05557


Maintenance

65

F9.9HE, F15CE, F15CEP, F20BE, F20BEP

EMU44850

Cleaning and adjusting spark plugThe spark plug is an important engine com-ponent and is easy to inspect. The conditionof the spark plug can indicate somethingabout the condition of the engine. For exam-ple, if the center electrode porcelain is verywhite, this could indicate an intake air leak orcarburetion problem in that cylinder. Do notattempt to diagnose any problems yourself.Instead, take the outboard motor to a

Yamaha dealer. You should periodically re-move and inspect the spark plug becauseheat and deposits will cause the spark plugto slowly break down and erode.1. Remove the spark plug caps from the

spark plugs.2. Remove the spark plug. If electrode ero-

sion becomes excessive, or if carbonand other deposits are excessive, youshould replace the spark plug with an-other of the correct type. WARNING!

ZMU05595


Maintenance

66

When removing or installing a sparkplug, be careful not to damage the in-sulator. A damaged insulator couldallow external sparks, which couldlead to explosion or fire. [EWM00562]

3. Be sure to use the specified spark plug,otherwise the engine may not operateproperly. Before fitting the spark plug,measure the electrode gap with a wirethickness gauge; replace it if out of spec-ification.

4. When fitting the plug, wipe off any dirtfrom the threads, and then screw it in tothe correct torque.

TIP:If a torque-wrench is not available when youare reinstalling a spark plug, a good estimateof the correct torque is 1/12 turn past finger-

tight. When you are installing a new sparkplug, a good estimate of the correct torque is1/2 turn past finger-tight.EMU37451

Checking fuel filterCheck the fuel filter periodically. If any wateror foreign matter is found in the filter, clean orreplace it. For cleaning or replacement of thefuel filter, consult your Yamaha dealer.

EMU29045

Inspecting idle speed

WARNINGEWM00452

Do not touch or remove electrical partswhen starting or during operation.

Keep hands, hair, and clothes awayfrom the flywheel and other rotatingparts while the engine is running.

NOTICEECM00491

This procedure must be performed whilethe outboard motor is in the water. Aflushing attachment or test tank can beused.

If the boat is not equipped with a tachometerfor the outboard motor, use a diagnostic ta-chometer for this procedure. Results mayvary depending on whether testing is con-ducted with the flushing attachment, in a testtank, or with the outboard motor in the water.1. Start the engine and allow it to warm up

Standard spark plug:DPR6EB-9

1. Spark plug gap2. Spark plug part number3. Spark plug I.D. mark (NGK)

Spark plug gap:0.8–0.9 mm (0.031–0.035 in)

Spark plug torque:17 Nm (1.73 kgf-m, 12.5 ft-lb)

ZMU06169


Maintenance

67

fully in neutral until it is running smooth-ly.

2. Once the engine has warmed up, verifywhether the idle speed is set to specifi-cation. For idle speed specifications, seepage 9. If you have difficulty verifying theidle speed, or the idle speed requires ad-justment, consult a Yamaha dealer orother qualified mechanic.

EMU38807

Changing engine oil

WARNINGEWM00761

Avoid draining the engine oil immedi-ately after stopping the engine. The oilis hot and should be handled with careto avoid burns.

Be sure the outboard motor is securelyfastened to the transom or a stablestand.

NOTICEECM01711

Change the engine oil after the first 20hours of operation or 3 months, and ev-ery 100 hours or at 1-year intervals there-after. Otherwise the engine will wearquickly.

To prevent spilling oil where it could causedamage to nature, it is strongly recommend-ed that you use an oil changer to change theengine oil. If an oil changer is not available,drain the engine oil by removing the drainscrew. If you are not familiar with the proce-dure for changing the engine oil, consult yourYamaha dealer.1. Put the outboard motor in an upright po-

sition (not tilted). NOTICE: If the out-board motor is not level, the oil levelindicated on the oil dipstick may notbe accurate. [ECM01862]

2. Start the engine. Warm it up and keepthe idle speed for 5-10 minutes.

3. Stop the engine and leave it for 5-10minutes.

4. Remove the top cowling.5. Remove the oil filler cap. Pull out the dip-

stick and use the oil changer to extractthe oil completely.

TIP:When using an oil changer, skip steps 6 and7.6. Prepare a suitable container that holds a

larger amount than the engine oil capac-ity. Remove the drain screw and gasketwhile holding the container under thedrain hole. Let the oil drain completely.Wipe up any spilled oil immediately.

1. Oil changer

ZMU05554

1 ZMU06617


Maintenance

68

TIP:If the oil does not drain easily, change the tiltangle or turn the outboard motor to port andstarboard to drain the oil.7. Put a new gasket on the oil drain screw.

Apply a light coat of oil to the gasket andinstall the drain screw.

TIP:If a torque wrench is not available when youare installing the drain screw, finger tightenthe screw just until the gasket comes intocontact with the surface of the drain hole.Then tighten 1/4 to 1/2 turn more. Tightenthe drain screw to the correct torque with atorque wrench as soon as possible.8. Add the correct amount of oil through the

filler hole. Put back the filler cap and thedipstick. NOTICE: Overfilling the oilcould cause leakage or damage. If theoil level is above the upper levelmark, drain until the level meets thespecified capacity. [ECM01851]

9. Leave the outboard motor for 5-10 min-utes.

10. Remove the oil dipstick and wipe itclean.

11. Insert the dipstick and remove it again.Be sure to completely insert the dipstickinto the dipstick guide, otherwise the oillevel measurement will be incorrect.

12. Recheck the oil level using the dipstickto be sure the level falls between the up-per and lower marks. Consult yourYamaha dealer if the oil level is out ofspecified level.

1. Drain screw2. Gasket

Drain screw tightening torque:27 Nm (2.75 kgf-m, 19.9 ft-lb)

1

2

ZMU05561

1. Oil filler cap

Recommended engine oil:YAMALUBE 4 or 4-stroke outboard motor oil

Engine oil quantity (without oil filter replacement):

1.6 L (1.69 US qt, 1.41 Imp.qt)Engine oil quantity (with oil filter re-placement):

1.8 L (1.90 US qt, 1.58 Imp.qt)

ZMU05562

1


Maintenance

69

13. Start the engine and make sure that thelow oil pressure-alert indicator remainsoff. Also, make sure that there are no oilleaks. NOTICE: If the low oil pressure-alert indicator comes on or if thereare oil leaks, stop the engine and findthe cause. Continued operation witha problem could cause severe enginedamage. Consult your Yamaha dealerif the problem cannot be located andcorrected. [ECM01623]

14. Install the top cowling.15. Dispose of used oil according to local

regulations.

TIP: For more information on the disposal of

used oil, consult your Yamaha dealer. Change the oil more often when operating

the engine under adverse conditions suchas extended trolling.

EMU29116

Inspecting wiring and connectors Inspect that each connector is engaged

securely. Inspect that each ground lead is properly

secured.

EMU32113

Checking propeller

WARNINGEWM01882

You could be seriously injured if the en-gine accidentally starts when you arenear the propeller. Before inspecting, re-moving, or installing the propeller, placethe shift control in neutral, turn the mainswitch to “ ” (off) and remove the key,and remove the clip from the engine shut-off switch. Turn off the battery cut-offswitch if your boat has one.

Do not use your hand to hold the propellerwhen loosening or tightening the propellernut. Put a wood block between the anti-cavi-tation plate and the propeller to prevent thepropeller from turning.

Checkpoints Check each of the propeller blades for ero-

1. Lower mark2. Oil dipstick3. Upper mark

2

1

3

ZMU08041ZMU02087

ZMU01897


Maintenance

70

sion from cavitation or ventilation, or otherdamage.

Check the propeller shaft for damage. Check the splines for wear or damage. Check for fish line tangled around the pro-

peller shaft.

Check the propeller shaft oil seal for dam-age.

EMU30663

Removing propellerEMU29198

Spline models1. Straighten the cotter pin and pull it out

using a pair of pliers.2. Remove the propeller nut, washer, and

spacer (if equipped). WARNING! Donot use your hand to hold the propel-ler when loosening the propeller nut.[EWM01891]

3. Remove the propeller, washer (ifequipped), and thrust washer.

EMU30673

Installing propellerEMU46120

Spline models

NOTICEECM00502

Make sure to use a new cotter pin andbend the ends over securely. Otherwise,the propeller could come off during oper-ation and be lost.

1. Apply Yamalube Marine Grease or acorrosion resistant grease to the propel-ler shaft.

2. Install the spacer (if equipped), thrustwasher, washer (if equipped), and pro-peller on the propeller shaft. NOTICE:Make sure to install the thrust washerbefore installing the propeller. Other-wise, the lower case and propellerboss could be damaged. [ECM01882]

3. Install the spacer (if equipped) and thewasher. Tighten the propeller nut to thespecified torque.

1. Cotter pin2. Propeller nut3. Washer

1

ZMU02062

23

45

4. Propeller5. Thrust washer


Maintenance

71

4. Align the propeller nut slot with the pro-peller shaft hole. Insert a new cotter pinin the hole and bend the cotter pin ends.NOTICE: Do not reuse the cotter pin.Otherwise, the propeller can come offduring operation. [ECM01892]

TIP:If the propeller nut slot does not align with the

propeller shaft hole after tightening the pro-peller nut to the specified torque, tighten thenut further to align the slot with the hole.EMU2928C

Changing gear oil

WARNINGEWM00801

Be sure the outboard motor is securelyfastened to the transom or a stablestand. You could be severely injured ifthe outboard motor falls on you.

Never get under the lower unit while itis tilted, even when the tilt support leveror knob is locked. Severe injury couldoccur if the outboard motor accidental-ly falls.

1. Tilt the outboard motor so that the gearoil drain screw is at the lowest point pos-sible.

2. Place a suitable container under thegear case.

3. Remove the gear oil drain screw andgasket. NOTICE: If there is an exces-sive quantity of metal particles on themagnetic gear oil drain screw, thiscan indicate lower unit problem. Con-sult your Yamaha dealer. [ECM01901]

1. Cotter pin2. Propeller nut3. Washer4. Propeller5. Thrust washer

Propeller nut tightening torque:17 Nm (1.73 kgf-m, 12.5 ft-lb)

1

23

45

ZMU08161

ZMU020631. Gear oil drain screw2. Oil level plug

ZMU02064

2

1


Maintenance

72

TIP: If a magnetic gear oil drain screw is

equipped, remove all metal particles fromthe screw before installing it.

Always use new gaskets. Do not reuse theremoved gaskets.

4. Remove the oil level plug and gasket toallow the oil to drain completely.NOTICE: Check the used gear oil afterit has been drained. If the gear oil ismilky or contains water or a largeamount of metal particles, the gearcase may be damaged. Have aYamaha dealer check and repair theoutboard motor. [ECM00714]

TIP:For disposal of used oil, consult yourYamaha dealer.5. Put the outboard motor in a vertical posi-

tion. Using a flexible or pressurized fill-ing device, inject the gear oil into thegear oil drain screw hole.

6. Put a new gasket on the oil level plug.

When the oil begins to flow out of the oillevel plug hole, insert and tighten the oillevel plug.

7. Put a new gasket on the gear oil drainscrew. Insert and tighten the gear oildrain screw.

EMU29304

Cleaning fuel tank

WARNINGEWM00921

Gasoline is highly flammable, and its va-pors are flammable and explosive. If you have any question about properly

doing this procedure, consult yourYamaha dealer.

Keep away from sparks, cigarettes,flames, or other sources of ignitionwhen cleaning the fuel tank.

Remove the fuel tank from the boat be-fore cleaning it. Work only outdoors inan area with good ventilation.

Wipe up any spilled fuel immediately. Reassemble the fuel tank carefully. Im-

proper assembly can result in a fuelleak, which could result in a fire or ex-plosion hazard.

Dispose of old gasoline according to lo-cal regulations.

1. Empty the fuel tank into an approvedcontainer.

2. Pour a small amount of suitable solventinto the tank. Install the cap and shakethe tank. Drain the solvent completely.

3. Remove the screws holding the fuel joint

Recommended gear oil:YAMALUBE outboard gear oil or Hyp-oid gear oil

Recommended gear oil grade:SAE 90 API GL-4

Gear oil quantity:0.250 L (0.264 US qt, 0.220 Imp.qt)

ZMU02065

Tightening torque:9 Nm (0.92 kgf-m, 6.6 ft-lb)

Tightening torque:9 Nm (0.92 kgf-m, 6.6 ft-lb)


Maintenance

73

assembly. Pull the assembly out of thetank.

4. Clean the filter (located on the end of thesuction pipe) in a suitable cleaning sol-vent. Allow the filter to dry.

5. Replace the gasket with a new one. Re-install the fuel joint assembly and tightenthe screws firmly.

EMU29317

Inspecting and replacing anode(s)Yamaha outboard motors are protected fromcorrosion by sacrificial anodes. Inspect theexternal anodes periodically. Remove scalesfrom the surfaces of the anodes. Consult aYamaha dealer for replacement of externalanodes.

NOTICEECM00721

Do not paint anodes, as this would renderthem ineffective.

TIP:Inspect ground leads attached to externalanodes on equipped models. Consult aYamaha dealer for inspection and replace-ment of internal anodes attached to the pow-er unit.EMU29324

Checking battery (for electric start models)

WARNINGEWM01903

Battery electrolyte is poisonous andcaustic, and batteries generate explosivehydrogen gas. When working near thebattery: Wear protective eye gear and rubber

gloves. Do not smoke or bring any other source

of ignition near the battery.

The procedure for checking the battery var-ies for different batteries. This procedurecontains typical checks that apply to manybatteries, but you should always refer to thebattery manufacturer’s instructions.

NOTICEECM01921

A poorly maintained battery will quicklydeteriorate.

1. Check the electrolyte level.

ZMU02066

ZMU05564


Maintenance

74

2. Check the battery’s charge. If your boatis equipped with the digital speedome-ter, the voltmeter and low battery alertfunctions will help you monitor the bat-tery’s charge. If the battery needs charg-ing, consult your Yamaha dealer.

3. Check the battery connections. Theyshould be clean, secure, and covered byan insulating cover. WARNING! Badconnections can produce shorting orarcing and cause an explosion.[EWM01913]

EMU29335

Connecting the battery

WARNINGEWM00573

Mount the battery holder securely in adry, well-ventilated, vibration-free loca-tion in the boat. Install a fully charged bat-tery in the holder.

NOTICEECM01125

Do not reverse the battery cables. Other-wise, the electrical parts could be dam-aged.

1. Make sure the main switch (on applica-ble models) is “ ” (off) before workingon the battery.

2. Connect the red battery cable to thePOSITIVE (+) terminal first. Then con-

nect the black battery cable to the NEG-ATIVE (-) terminal.

3. The electrical contacts of the battery andcables must be clean and properly con-nected, or the battery will not start theengine.

EMU29372

Disconnecting the battery1. Turn off the battery cut-off switch (if

equipped) and main switch. NOTICE: Ifthey are left on, the electrical systemcan be damaged. [ECM01931]

2. Disconnect the negative cable(s) fromthe negative (-) terminal. NOTICE: Al-ways disconnect all negative (-) ca-bles first to avoid a short circuit anddamage to the electrical system.[ECM01941]

3. Disconnect the positive cable(s) and re-move the battery from the boat.

4. Clean, maintain, and store the batteryaccording to the manufacturer’s instruc-tions.

1. Red cable2. Black cable3. Battery

ZMU01811

1

23


75

Trouble RecoveryEMU29428

TroubleshootingA problem in the fuel, compression, or igni-tion systems can cause poor starting, loss ofpower, or other problems. This section de-scribes basic checks and possible remedies,and covers all Yamaha outboard motors.Therefore some items may not apply to yourmodel.If your outboard motor requires repair, bringit to your Yamaha dealer.If the engine trouble-alert indicator is flash-ing, consult your Yamaha dealer.

Starter will not operate.Q. Is battery capacity weak or low?A. Check battery condition. Use battery ofrecommended capacity.

Q. Are battery connections loose or corrod-ed?A. Tighten battery cables and clean batteryterminals.

Q. Is fuse for electric start relay or electric cir-cuit blown?A. Check for cause of electric overload andrepair. Replace fuse with one of correct am-perage.

Q. Are starter components faulty?A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear?A. Shift to neutral.

Engine will not start (starter operates).Q. Is fuel tank empty?A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?A. Clean or replace filter.

Q. Is starting procedure incorrect?A. See page 38.

Q. Has fuel pump malfunctioned?A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.

Q. Are spark plug cap(s) fitted incorrectly?A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.

Q. Are ignition parts faulty?A. Have serviced by a Yamaha dealer.

Q. Is engine shut-off cord (lanyard) not at-tached?A. Attach cord.

Q. Are engine inner parts damaged?A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.


Trouble Recovery

76

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.

Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.


Q. Have ignition parts failed?A. Have serviced by a Yamaha dealer.

Q. Has alert system activated?A. Find and correct cause of alert.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Is specified engine oil not being used?A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect?A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed?A. Open air vent screw.

Q. Is choke knob pulled out?

A. Return to home position.

Q. Is motor angle too high?A. Return to normal operating position.

Q. Is carburetor clogged?A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is throttle valve adjustment incorrect?A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected?A. Connect securely.

Alert buzzer sounds or indicator lights.Q. Is cooling system clogged?A. Check water intake for restriction.

Q. Is engine oil level low?A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorat-ed?A. Replace oil with fresh, specified type.

Q. Is oil filter clogged?A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunc-tioned?A. Have serviced by a Yamaha dealer.


Trouble Recovery

77

Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.

Q. Is water pump or thermostat faulty?A. Have serviced by a Yamaha dealer.

Q. Is there excess water in fuel filter cup?A. Drain filter cup.

Engine power loss.Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect?A. Install correct propeller to operate out-board at its recommended speed (r/min)range.

Q. Is trim angle incorrect?A. Adjust trim angle to achieve most efficientoperation.

Q. Is motor mounted at incorrect height ontransom?A. Have motor adjusted to proper transomheight.

Q. Has alert system activated?A. Find and correct cause of alert.

Q. Is boat bottom fouled with marine growth?A. Clean boat bottom.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.

Q. Are weeds or other foreign matter tangled

on gear housing?A. Remove foreign matter and clean lowerunit.

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.


Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Have electrical parts failed?A. Have serviced by a Yamaha dealer.

Q. Is specified fuel not being used?A. Replace fuel with specified type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw closed?A. Open the air vent screw.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.


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78

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is high pressure fuel pump drive belt bro-ken?A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shiftlever position?A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged?A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangledon propeller?A. Remove and clean propeller.

Q. Is motor mounting bolt loose?A. Tighten bolt.

Q. Is steering pivot loose or damaged?A. Tighten or have serviced by a Yamahadealer.EMU29434

Temporary action in emergency

EMU29442

Impact damage

WARNINGEWM00871

The outboard motor can be seriouslydamaged by a collision while operating or

trailering. Damage could make the out-board motor unsafe to operate.

If the outboard motor hits an object in the wa-ter, follow the procedure below.

1. Stop the engine immediately.2. Check the control system and all compo-

nents for damage. Also, check the boatfor damage.

3. Whether damage is found or not, returnto the nearest harbor slowly and careful-ly.

4. Have a Yamaha dealer check the out-board motor before operating it again.

EMU30684

Replacing fuseIf a fuse has blown, open the fuse holder andremove the fuse with a fuse puller. Replaceit with a spare one of the proper amperage.

WARNINGEWM00632

Substituting an incorrect fuse or a pieceof wire could allow excessive currentflow. This could cause electric systemdamage and a fire hazard.

Consult your Yamaha dealer if the new fuseimmediately blows again.


Trouble Recovery

79

EMU32131

Power tilt will not operateIf the engine cannot be tilted up or down withthe power tilt because of a discharged bat-tery or a failure with the power tilt unit, the en-gine can be tilted manually.1. Loosen the manual valve screw by turn-

ing it counterclockwise until it stops.

2. Put the engine in the desired position,then tighten the manual valve screw byturning it clockwise.

EMU29534

Starter will not operateIf the starter mechanism does not operate(the engine cannot be cranked with the start-er), the engine can be started with an emer-gency starter rope.

WARNINGEWM01023

Use this procedure only in an emergen-cy to return to the nearest port for re-pairs.

When the emergency starter rope isused to start the engine, the start-in-gear protection device does not oper-ate. Make sure the remote control leveris in neutral. Otherwise the boat couldunexpectedly start to move, whichcould result in an accident.

Attach the engine shut-off cord to a se-cure place on your clothing, or yourarm or leg while operating the boat.

Do not attach the cord to clothing thatcould tear loose. Do not route the cordwhere it could become entangled, pre-venting it from functioning.

Avoid accidentally pulling the cord dur-

1. Fuse puller2. Cap3. Fuse (20 A)4. Spare fuse (20 A)

1. Fuse puller

ZMU05565

1

23

4

1

ZMU04337

1. Manual valve screw


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80

ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

Make sure no one is standing behindyou when pulling the starter rope. Itcould whip behind you and injuresomeone.

An unguarded, rotating flywheel is verydangerous. Keep loose clothing andother objects away when starting theengine. Use the emergency starter ropeonly as instructed. Do not touch the fly-wheel or other moving parts when theengine is running. Do not install thestarter mechanism or top cowling afterthe engine is running.

Do not touch the ignition coil, sparkplug wire, spark plug cap, or other elec-trical components when starting or op-erating the motor. You could get anelectrical shock.

EMU31994

Emergency starting engine (manual starter model)1. Remove the top cowling.2. Remove the dust cover.

3. Disconnect the start-in-gear protectioncable from the starter, if equipped.

4. Remove the starter/flywheel cover afterremoving the bolt(s).

5. Prepare the engine for starting. For fur-ther information, see page 38. Be surethat the gear shift is in neutral and thatthe clip is attached to the engine shut-offswitch.

ZMU05611

ZMU05603

ZMU05604

ZMU05625


Trouble Recovery

81

6. Insert the knotted end of the emergencystarter rope into the notch in the flywheelrotor and wind the rope 1 or 2 turn(s)around the flywheel clockwise.

7. Pull the rope slowly until resistance isfelt. Give a strong pull straight out tocrank and start the engine. If the enginedoes not start on the first try, repeat theprocedure.

TIP: If the engine does not start on the first try,

repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asmall amount (between 1/8 and 1/4) andtry again. Also if the engine is warm andfails to start, open the throttle a sameamount and try to start the engine again. Ifthe engine still fails to start, see page 38.

Slowly return the throttle grip to the fullyclosed position so that the engine does notstall.

EMU32004

Emergency starting engine (electric start model)1. Remove the top cowling.2. Remove the dust cover.

3. Remove the electrical system cover byremoving its screw(s).

4. Remove the screw(s) from the plate, andpull it down.

ZMU05533

N

ZMU02026

ZMU05610

ZMU05611

ZMU05612


Trouble Recovery

82

5. Remove the starter/flywheel cover afterremoving the bolt(s).

6. Secure the electrical system plate bytightening the bolt(s), and fix the plate.

7. Prepare the engine for starting. For fur-ther information, see page 38. Be surethat the gear shift is in neutral and thatthe clip is attached to the engine shut-offswitch. The main switch must be “ ”(on), if equipped.

ZMU05613

ZMU05624

ZMU05614

ZMU05615

ZMU05616


Trouble Recovery

83

8. Insert the knotted end of the emergency

starter rope into the notch in the flywheelrotor and wind the rope 1 or 2 turn(s)around the flywheel clockwise.

9. Pull the rope slowly until resistance isfelt. Give a strong pull straight out tocrank and start the engine. If the enginedoes not start on the first try, repeat theprocedure.

TIP: If the engine does not start on the first try,

repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asmall amount (between 1/8 and 1/4) andtry again. Also if the engine is warm andfails to start, open the throttle a sameamount and try to start the engine again. Ifthe engine still fails to start, see page 38.

Slowly return the throttle grip to the fullyclosed position so that the engine does notstall.

EMU33502

Treatment of submerged motorIf the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corrosion may begin almost immedi-ately. NOTICE: Do not attempt to run theoutboard motor until it has been com-pletely inspected. [ECM00402]

ZMU05533

N

ZMU02026

ON STARTOFF

ZMU01906

ZMU05622


84

INDEXA

Alcohol and drugs ................................... 2Alert indicator........................................ 25Alert system.......................................... 27Anode(s), inspecting and replacing ...... 73Anti-fouling paint ................................... 15Avoid collisions ....................................... 3

BBattery .................................................. 36Battery, checking (electric start

models)............................................... 73Battery, connecting ............................... 74Battery, disconnecting .......................... 74Battery requirements ............................ 12Boat horsepower rating......................... 11Boating safety ......................................... 2Boating safety publications ..................... 3Breaking in engine ................................ 32

CCarbon monoxide ................................... 2CE Marking ............................................. 5Checks after engine warm up ............... 44Checks after starting engine ................. 43Checks before starting engine .............. 32Clamping the outboard motor ............... 31Cleaning the outboard motor ................ 59Components diagram ........................... 16Control functions, checking................... 33Cooling water........................................ 43Cowling lock lever................................. 25Cruising in salt water or other

conditions ........................................... 54

DDismounting the outboard motor .......... 55

EEC Declaration of Conformity (DoC)....... 4Electric shock.......................................... 1Emergency equipment.......................... 15Emergency starting engine (electric

start model) ........................................ 81

Emergency starting engine (manual starter model) ..................................... 80

Emergency, temporary action in ........... 78Engine, checking .................................. 35Engine oil .............................................. 34Engine oil, changing ............................. 67Engine oil, filling.................................... 32Engine oil requirements ........................ 13Engine shut-off cord (lanyard) .......... 1, 34Engine shut-off cord (lanyard) and

clip ...................................................... 20Engine stop button................................ 20

FFilling fuel.............................................. 36First-time operation............................... 32Flushing device............................... 25, 35Flushing in a test tank........................... 57Flushing power unit............................... 58Fuel filter, checking......................... 33, 66Fuel leaks, checking for ........................ 33Fuel level .............................................. 33Fuel requirements................................. 14Fuel system .......................................... 33Fuel tank ............................................... 16Fuel tank, cleaning................................ 72Fuse, replacing ..................................... 78

GGasoline............................................ 1, 14Gasoline exposure and spills .................. 2Gear oil, changing................................. 71Gear shift lever ..................................... 19Greasing ............................................... 64

HHot parts ................................................. 1

IIdentification numbers record ................. 4Idle speed, inspecting ........................... 66Impact damage ..................................... 78Installation requirements....................... 11Instruments and indicators.................... 26


INDEX

85

KKey number ............................................ 4

LLaws and regulations.............................. 3Low oil pressure alert............................ 27Low oil pressure-alert indicator............. 26Lubrication ............................................ 58

MMain switch ........................................... 21Maintenance chart 1 ............................. 61Maintenance chart 2 ............................. 63Manual starter handle ........................... 21Modifications........................................... 2Motor disposal requirements ................ 15Mounting height .................................... 30Mounting motor..................................... 12Mounting the outboard motor................ 29Muddy or acidic water........................... 14

NNeutral interlock trigger......................... 18Neutral throttle lever ............................. 18

OOperating engine .................................. 37Outboard motor (painted surface),

checking ............................................. 59Outboard motor safety ............................ 1Outboard motor serial number................ 4Overheat alert ....................................... 27Overheat-alert indicator ........................ 26Overloading ............................................ 2

PPassengers............................................. 2Passenger training.................................. 3People in the water ................................. 2Periodic maintenance ........................... 59Personal flotation devices (PFDs) .......... 2Power tilt ................................................. 1Power tilt switch .................................... 21Power tilt system, checking .................. 36

Power tilt unit ........................................ 24Power tilt will not operate...................... 79Propeller ................................................. 1Propeller, checking ............................... 69Propeller, installing ............................... 70Propeller, removing............................... 70Propeller selection ................................ 13

RRead manuals and labels ....................... 6Rectifier Regulator (optional) ................ 12Remote control box............................... 17Remote control lever............................. 18Remote control requirements ............... 12Replacement parts................................ 59Rotating parts ......................................... 1

SSending fuel (portable tank).................. 37Severe operating conditions ................. 60Shallow water ....................................... 52Shifting.................................................. 44Shifting (checks after engine warm

up) ...................................................... 44Spark plug, cleaning and adjusting....... 65Specifications.......................................... 9Starter button ........................................ 21Starter will not operate.......................... 79Start-in-gear protection ......................... 13Starting engine...................................... 38Steering friction adjuster ....................... 22Stopping boat........................................ 45Stopping engine.................................... 46Stop switches........................................ 44Storing outboard motor ......................... 56Submerged outboard motor .................. 83

TThrottle friction adjuster ........................ 19Throttle grip........................................... 19Throttle indicator ................................... 19Tiller handle .......................................... 18Tilting up and down............................... 49Tilt lock mechanism .............................. 23


INDEX

86

Tilt support bar...................................... 24Tilt support knob ................................... 24Top cowling, installing........................... 35Top cowling, removing.......................... 33Transporting and storing outboard

motor .................................................. 55Trimming outboard motor ..................... 46Trim rod (tilt pin).................................... 23Trim tab................................................. 23Troubleshooting .................................... 75

WWarming up engine............................... 43Warning labels ........................................ 6Weather .................................................. 3Wiring and connectors, inspecting........ 69


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