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F6 F8 T8 OWNER’S MANUAL LIT-18626-07-06 60R-F8199-13 U.S.A.Edition

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Page 1: F6 F8 - Yamaha - Motorcycles, Snowmobiles, Boats ... · PDF fileF8 T8 OWNER’S MANUAL LIT-18626-07-06 60R-F8199-13 U.S.A.Edition. ZMU01690 Read this owner’s manual carefully before

F6F8T8

OWNER’S MANUAL

LIT-18626-07-0660R-F8199-13

U.S.A.Edition

Page 2: F6 F8 - Yamaha - Motorcycles, Snowmobiles, Boats ... · PDF fileF8 T8 OWNER’S MANUAL LIT-18626-07-06 60R-F8199-13 U.S.A.Edition. ZMU01690 Read this owner’s manual carefully before

ZMU01690

Read this owner’s manual carefully before operating your outboard motor.

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Important manual informationEMU31280

To the ownerThank you for choosing a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for proper operation, mainte-nance and care. A thorough understanding ofthese simple instructions will help you obtainmaximum enjoyment from your new Yamaha.If you have any question about the operationor maintenance of your outboard motor,please consult a Yamaha dealer.In this Owner’s Manual particularly importantinformation is distinguished in the followingways.

The Safety Alert Symbol means AT-TENTION! BECOME ALERT! YOUR SAFE-TY IS INVOLVED!

WARNINGEWM00780

Failure to follow WARNING instructionscould result in severe injury or death to themachine operator, a bystander, or a per-son inspecting or repairing the outboardmotor.

CAUTION:ECM00700

A CAUTION indicates special precautionsthat must be taken to avoid damage to theoutboard motor.

NOTE:A NOTE provides key information to makeprocedures easier or clearer.

Yamaha continually seeks advancements inproduct design and quality. Therefore, whilethis manual contains the most current productinformation available at the time of printing,there may be minor discrepancies between

your machine and this manual. If there is anyquestion concerning this manual, please con-sult your Yamaha dealer.

NOTE:The F6MH, F8MH, T8EH, T8PH, T8PR andthe standard accessories are used as a basefor the explanations and illustrations in thismanual. Therefore some items may not applyto every model.

EMU25130

F6, F8, T8OWNER’S MANUAL

©2006 by Yamaha Motor Corporation, USA

1st Edition, January 2006All rights reserved.

Any reprinting or unauthorized usewithout the written permission ofYamaha Motor Corporation, USA

is expressly prohibited.Printed in France

P/N LIT-18626-07-06

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Table of contents

General information ..........................1Identification numbers record.......... 1

Outboard motor serial number ........... 1Key number ........................................ 1

Emission control information ........... 1North American models...................... 1Star labels .......................................... 2

Safety information ........................... 3Important labels............................... 5

Warning labels.................................... 5Caution labels..................................... 5

Basic boating rules (Rules of the road) ....................... 5Steering and sailing rules and sound

signals............................................. 6Rules when encountering vessels...... 6Other special situations ...................... 7

Fueling instructions ......................... 9Gasoline ........................................... 10Engine oil.......................................... 10

Battery requirement....................... 11Battery specifications ....................... 11Without a rectifier or Rectifier

Regulator ...................................... 11Propeller selection......................... 11Start-in-gear protection ................. 12

Basic components ..........................13Main components.......................... 13

Fuel tank........................................... 14Fuel joint........................................... 15Fuel gauge ....................................... 15Fuel tank cap.................................... 15Air vent screw................................... 15Remote control ................................. 15Remote control lever ........................ 15Neutral interlock trigger .................... 16Neutral throttle lever ......................... 16Choke switch .................................... 16Tiller handle...................................... 16Gear shift lever ................................. 16Throttle grip ...................................... 17Throttle indicator............................... 17

Throttle friction adjuster .................... 17Engine stop lanyard switch............... 18Engine stop button ........................... 18Choke knob for pull type................... 19Manual starter handle....................... 19Starter button.................................... 19Main switch....................................... 19Power tilt switch................................ 19Steering friction adjuster................... 20Trim rod (tilt pin) ............................... 21Tilt lock mechanism.......................... 21Tilt support knob............................... 21Tilt support bar ................................. 21Power tilt unit .................................... 22Top cowling lock lever

(pull up type) ................................. 22Flushing device ................................ 22Warning indicator ............................. 22Low oil pressure warning indicator ... 23

Warning system ............................ 23Low oil pressure warning.................. 23

Operation ......................................... 24Installation..................................... 24

Mounting the outboard motor ........... 24Clamping the outboard motor ........... 25

Breaking in engine ........................ 26Procedure for 4-stroke models ......... 26

Preoperation checks ..................... 26Fuel .................................................. 26Controls ............................................ 27Engine .............................................. 27Checking the engine oil level............ 27

Filling fuel...................................... 27Ring Free Fuel Additive.................... 28

Operating engine .......................... 28Feeding fuel (portable tank) ............. 28Starting engine ................................. 29

Warming up engine....................... 34Manual start models ......................... 34

Shifting .......................................... 35Forward (tiller handle and remote

control models) ............................. 35

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Table of contents

Reverse (manual tilt and hydro tilt models) ......................................... 35

Stopping engine ............................ 36Procedure......................................... 36Procedure......................................... 37

Trimming outboard motor.............. 37Adjusting trim angle for manual tilt

models .......................................... 38Adjusting trim angle

(power tilt models)......................... 39Adjusting boat trim............................ 39

Tilting up and down ....................... 40Procedure for tilting up

(manual tilt models)....................... 41Procedure for tilting up ..................... 41Procedure for tilting down

(manual tilt models)....................... 43Procedure for tilting down................. 43

Cruising in shallow water .............. 44Cruising in shallow water

(manual tilt models)....................... 44Power trim and tilt models / power

tilt models...................................... 45Cruising in other conditions........... 46

Maintenance..................................... 47Specifications ................................ 47Transporting and storing outboard

motor .......................................... 49Clamp screw mounting models ........ 49Storing outboard motor..................... 49Procedure......................................... 50Lubrication

(except oil injection models).......... 51Cleaning and anticorrosion

measures ...................................... 51Battery care ...................................... 51Flushing power unit .......................... 52Cleaning the outboard motor............ 53Checking painted surface of motor... 53

Periodic maintenance.................... 53Replacement parts ........................... 53Maintenance chart............................ 54Maintenance chart (additional) ......... 55

Greasing........................................... 56Cleaning and adjusting spark plug ... 56Checking fuel system ....................... 57Checking fuel filter ............................ 58Inspecting idling speed..................... 58Changing engine oil.......................... 58Checking wiring and connectors ...... 60Exhaust leakage............................... 60Water leakage .................................. 60Engine oil leakage ............................ 60Checking power trim and tilt /

power tilt system ........................... 61Checking propeller ........................... 61Removing the propeller .................... 62Installing the Propeller ...................... 62Changing gear oil ............................. 63Cleaning fuel tank............................. 64Inspecting and replacing anode(s) ... 65Checking battery

(for electric start models) .............. 65Connecting the battery ..................... 66Disconnecting the battery ................. 67Checking top cowling ....................... 67Coating the boat bottom ................... 67

Trouble Recovery............................ 68Troubleshooting ............................ 68Temporary action in emergency ... 71

Impact damage................................. 71Replacing fuse.................................. 71Power trim and tilt / power tilt will

not operate.................................... 72Starter will not operate ..................... 72Emergency starting engine............... 73

Engine fails to operate .................. 74Ignition system malfunction .............. 74

Treatment of submerged motor .... 74Procedure......................................... 74

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Table of contents

Consumer information.................... 76Important warranty information for

U.S.A. and Canada .................... 76YAMAHA MOTOR

CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ............... 78

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ............. 80

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General information

1

EMU25170

Identification numbers recordEMU25183

Outboard motor serial numberThe outboard motor serial number is stampedon the label attached to the port side of theclamp 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. EMU25190

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.Record this number in the space provided forreference in case you need a new key.

EMU25221

Emission control informationEMU25230

North American modelsThis engine conforms to U.S. EnvironmentalProtection Agency (EPA) regulations for ma-rine SI engines. See the label affixed to yourengine for details.EMU25242

Approval label of emission control certifi-cateThis label is attached to the bottom cowling.

1. Outboard motor serial number location

1. Outboard motor serial number location

1. Key number

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General information

2

New Technology; (4-stroke/HPDI) EM

EMU25262

Manufactured date labelThis label is attached to the clamp bracket orthe swivel bracket.

EMU25272

Star labelsYour outboard motor is labeled with a Califor-nia Air Resources Board (CARB) star label.See below for a description of your particularlabel.

EMU25280

One Star—Low EmissionThe one-star label identifies engines thatmeet the Air Resources Board’s 2001 ex-haust emission standards. Engines meetingthese standards have 75% lower emissionsthan conventional carbureted two-stroke en-gines. These engines are equivalent to theU.S. EPA’s 2006 standards for marine en-gines.

1. Approval label location

1. Manufactured date label location

ZMU05159

1. Star labels location

Manufactured:

ZMU04346

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General information

3

EMU25290

Two Stars—Very Low EmissionThe two-star label identifies engines that meetthe Air Resources Board’s 2004 exhaustemission standards. Engines meeting thesestandards have 20% lower emissions thanOne Star-Low-Emission engines.

EMU25300

Three Stars—Ultra Low EmissionThe three-star label identifies engines thatmeet the Air Resources Board’s 2008 ex-haust emission standards. Engines meetingthese standards have 65% lower emissionsthan One Star-Low-Emission engines.

EMU25362

Safety information� Before mounting or operating the outboard

motor, read this entire manual. Reading itshould give you an understanding of themotor and its operation.

� Before operating the boat, read any own-er’s or operator’s manuals supplied with itand all labels. Be sure you understand eachitem before operating.

� Do not overpower the boat with this out-board motor. Overpowering the boat couldresult in loss of control. The rated power ofthe outboard should be equal to or less thanthe rated horsepower capacity of the boat.If the rated horsepower capacity of the boatis unknown, consult the dealer or boat man-ufacturer.

� Do not modify the outboard. Modificationscould make the motor unfit or unsafe to use.

� Incorrect propeller selection and incorrectuse may not only cause engine damage,but also adversely affect fuel consumption.Consult your dealer for correct use.

� Never operate after drinking alcohol or tak-ing drugs. About 50% of all boating fatalitiesinvolve intoxication.

� Have an approved personal flotation device(PFD) on board for every occupant. It is agood idea to wear a PFD whenever boat-

ZMU01702

ZMU01703

ZMU01704

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General information

4

ing. At a minimum, children and non-swim-mers should always wear PFDs, andeveryone should wear PFDs when thereare potentially hazardous boating condi-tions.

� Gasoline is highly flammable, and its va-pors are flammable and explosive. Handleand store gasoline carefully. Make surethere are no gas fumes or leaking fuel be-fore starting the engine.

� This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which may cause brain dam-age or death when inhaled. Symptoms in-clude nausea, dizziness, and drowsiness.Keep cockpit and cabin areas well ventilat-ed. Avoid blocking exhaust outlets.

� Check throttle, shift, and steering for properoperation before starting the engine.

� Attach the engine stop switch lanyard cordto a secure place on your clothing, or yourarm or leg while operating. If you acciden-tally leave the helm, the cord will pull fromthe switch, stopping the engine.

� Know the marine laws and regulationswhere you will be boating—and obey them.For basic boating rules, see “Rules of theroad” on page 5.

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

� Tell someone where you are going: leave aFloat Plan with a responsible person. Besure to cancel the Float Plan when you re-turn.

� Use common sense and good judgmentwhen boating. Know your abilities, and besure you understand how your boat han-dles under the different boating conditionsyou may encounter. Operate within your

limits, and the limits of your boat. Alwaysoperate at safe speeds, and keep a carefulwatch for obstacles and other traffic.

� Always watch carefully for swimmers duringthe engine operation.

� Stay away from swimming areas.� When a swimmer is in the water near you

shift into neutral and shut off the engine.� Do not illegally discard empty containers

used to replace or replenish oil. For the cor-rect processing of empty containers, con-sult the dealer where you purchased the oil.

� When replacing oils used to lubricate theproduct (engine or gear oil), be sure to wipeaway any spilt oil. Never pour oil without us-ing a funnel or similar device. If necessary,verify the necessary replacement proce-dure with the dealer.

� Never illegally discard (dump) the product.Yamaha recommends consulting the deal-er on discarding the product.

Be informed about boating safety. Additionalpublications and information can be obtainedfrom many organizations, including the follow-ing:United States Coast GuardConsumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af-fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647National Marine Manufacturers Associa-tion (NMMA)401 N. Michigan Ave. Chicago, Il 60611Marine Retailers Association of America155 N. Michigan Ave. Chicago, Il 60601

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General information

5

EMU25382

Important labelsEMU25395

Warning labels

EMU25401

Label

WARNINGEWM01260

� Be sure shift control is in neutral beforestarting engine. (except 2HP)

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

� Keep hands, hair, and clothes away fromflywheel and other rotating parts whileengine is running.

EMU25431

Label

WARNINGEWM01300

� This engine is equipped with a neutralstarting device.

� The engine will not start unless the shiftcontrol is in neutral position.

EMU25465

Caution labels

EMU25473

Label

CAUTION:ECM01191

Transport and store the engine only asshown. Otherwise, engine damage couldresult from leaking oil.

EMU25500

Basic boating rules (Rules of the road)

Just as there are rules which apply when youare driving on streets and high ways, thereare waterway rules which apply when you aredriving your boat. These rules are used inter-nationally, and are also enforced by the Unit-ed States Coast Guard and local agencies.You should be aware of these rules, and fol-low them whenever you encounter anothervessel on the water.

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General information

6

Several sets of rules prevail according to geo-graphic location, but are all basically the sameas the International Rules of the Road. Therules presented here in your Owner’s Manualare condensed, and have been provided foryour convenience only. Consult your localU.S. Coast Guard Auxiliary or Department ofMotor Vehicles for a complete set of rulesgoverning the waters in which you will be us-ing your boat.EMU25510

Steering and sailing rules and sound signalsWhenever two vessels on the water meet oneanother, one vessel has the right-of-way; it iscalled the “stand-on” vessel. The vesselwhich does not have the right-of-way is calledthe “give-way” or “burdened” vessel. Theserules determine which vessel has the right-of-way, and what each vessel should do.Stand-on vesselThe vessel with the right-of-way has the dutyto continue its course and speed, except toavoid an immediate collision. When you main-tain your direction and speed, the other vesselwill be able to determine how best to avoidyou.Give-way vesselThe vessel which does not have the right-of-way has the duty to take positive and timelyaction to stay out of the way of the Stand-Onvessel. Normally, you should not cross in frontof the vessel with the right-of-way. You shouldslow down or change directions briefly andpass behind the other vessel. You should al-ways move in such a way that the operator ofthe other vessel can see what you are doing.“The general prudential rule”This rule is called Rule 2 in the InternationalRules and says,

“In obeying and construing these rules due re-gard shall be had to all dangers of navigationand collision, and to any special circumstanc-es, which may render a departure from theabove rules necessary in order to avoid im-mediate danger.”In other words, follow the standard rules ex-cept when a collision will occur unless bothvessels try to avoid each other. If that is thecase, both vessels become “Give-Way” ves-sels.EMU25520

Rules when encountering vesselsThere are three main situations which youmay encounter with other vessels which couldlead to a collision unless the Steering Rulesare followed:Meeting: (you are approaching another ves-sel head-on)Crossing: (you are traveling across the othervessel’s path)Overtaking: (you are passing or beingpassed by another vessel)In the following illustration, your boat is in thecenter. You should give the right-of-way toany vessels shown in white area (you are theGive-Way vessel). Any vessels in the shadedarea must yield to you (they are the Give-Wayvessels). Both you and the meeting vesselmust alter course to avoid each other.

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General information

7

MeetingIf you are meeting another power vessel headon, and are close enough to run the risk of col-lision, neither of you has the right-of-way!Both of you should alter course to avoid an ac-cident. You should keep the other vessel onyour port (left) side. This rule doesn’t apply ifboth of you will clear one another if you con-tinue on your set course and speed.

CrossingWhen two power driven vessels are crossingeach other’s path close enough to run the riskof collision, the vessel which has the other onthe starboard (right) side must keep out of theway of the other. If the other vessel is on yourright, you must keep out of its way; you are theGive-Way vessel. If the other vessel is onyour port (left) side, remember that youshould maintain course and direction, provid-ed the other vessel gives you the right-of-wayas it should.

OvertakingIf you are passing another vessel, you are the“Give-Way” vessel. This means that the othervessel is expected to maintain its course andspeed. You must stay out of its way until youare clear of it. Likewise, if another vessel ispassing you, you should maintain your speedand direction so that the other vessel cansteer itself around you.EMU25530

Other special situationsThere are three other rules you should beaware of when driving your boat around othervessels.Narrow channels and bendsWhen navigating in narrow channels, youshould keep to the right when it is safe andpractical to do so. If the operator of a power-driven vessel is preparing to go around abend that may obstruct the view of other watervessels, the operator should sound a pro-longed blast on the whistle (4 to 6 seconds). Ifanother vessel is around the bend, it tooshould sound the whistle. Even if no reply isheard, however, the vessel should still pro-ceed around the bend with caution. If you nav-igate such waters with your boat, you willneed to carry a portable air horn, availablefrom local marine supply stores.Fishing vessel right-of-wayAll vessels which are fishing with nets, lines ortrawls are considered to be “fishing vessels”under the International Rules. Vessels withtrolling lines are not considered fishing ves-sels. Fishing vessels have the right-of-way re-gardless of position. Fishing vessels cannot,however, impede the passage of other ves-sels in narrow channels.Sailing vessel right-of-waySailing vessels should normally be given theright-of-way. The exceptions to this are:

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General information

8

1. When the sailing vessel is overtaking thepower-driven vessel, the power-drivenvessel has the right-of-way.

2. Sailing vessels should keep clear of anyfishing vessel.

3. In a narrow channel, a sailing vesselshould not hamper the safe passage of apower-driven vessel which can navigateonly in such a channel.

Reading buoys and other markersThe waters of the United states are markedfor safe navigation by the lateral system ofbuoyage. Simply put, buoys and markershave an arrangement of shapes, colors, num-bers and lights to show which side of the buoya boater should pass on when navigating in aparticular direction. The markings on thesebuoys are oriented from the perspective of be-ing entered from seaward (the boater is goingtowards the port). This means that red buoysare passed on the starboard (right) side whenproceeding from open water into port, andblack buoys are to port (left) side. When navi-gating out of port, your position with respect tothe buoys should be reversed; red buoysshould be to port and black buoys to star-board.Many bodies of water used by boaters are en-tirely within the boundaries of a particularstate. The Uniform State Waterway MarkingSystem has been devised for these waters.This system uses buoys and signs with dis-tinctive shapes and colors to show regulatoryor advisory information. These markers arewhite with black letters and orange boarders.They signify speed zones, restricted areas,danger areas, and general information.Remember, markings may vary by geograph-ic location. Always consult local boating au-thorities before driving your boat in unfamiliarwaters.

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General information

9

EMU25540

Fueling instructions

WARNINGEWM00010

GASOLINE AND ITS VAPORS ARE HIGH-LY FLAMMABLE AND EXPLOSIVE!

� Do not smoke when refueling, and keepaway from sparks, flames, or othersources of ignition.

� Stop engine before refueling.� Refuel in a well-ventilated area. Refuel

portable fuel tanks off the boat.

ZMU01708

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General information

10

� Take care not to spill gasoline. If gaso-line spills, wipe it up immediately withdry rags.

� Do not overfill the fuel tank.� Tighten the filler cap securely after refu-

eling.� If you should swallow some gasoline, in-

hale a lot of gasoline vapor, or get gaso-line in your eyes, get immediate medicalattention.

� If any gasoline spills onto your skin, im-mediately wash with soap and water.Change clothing if gasoline spills on it.

� Touch the fuel nozzle to the filler open-ing or funnel to help prevent electrostat-ic sparks.

CAUTION:ECM00010

Use only new clean gasoline which hasbeen stored in clean containers and is notcontaminated with water or foreign matter.

EMU25570

GasolineIf knocking or pinging occurs, use a differentbrand of gasoline or premium unleaded fuel.

GasoholThere are two types of gasohol: gasohol con-taining ethanol and that containing methanol.Gasohol containing ethanol can be used ifethanol content does not exceed 10% and thefuel meets minimum octane ratings. Yamahadoes not recommended gasohol containingmethanol because it can cause fuel systemdamage or engine performance problems.

EMU31440

Engine oil

NOTE:If the recommended engine oil grades are notavailable, select an alternative from the fol-lowing chart according to the average temper-atures in your area.

CAUTION:ECM01050

All 4-stroke engines are shipped from thefactory without engine oil.

Recommended gasoline:Regular unleaded gasoline with a mini-mum octane rating of 86 (Pump Oc-tane Number) = (R+M)/2

Recommended engine oil:YAMALUBE 4-M FC-W oil or 4-stroke motor oil with a combination of the fol-lowing SAE and API oil classifications

Engine oil type SAE:10W-30 or 10W-40

Engine oil grade API:SE, SF, SG, SH, SJ, SL

Engine oil quantity (excluding oil filter):0.8 L (0.85 US qt) (0.70 Imp.qt)

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11

EMU25690

Battery requirement

CAUTION:ECM01060

Do not use a battery that does not meet thespecified capacity. If a battery which doesnot meet specifications is used, the elec-tric system could perform poorly or beoverloaded, causing electric system dam-age.

For electric start models, choose a batterywhich meets the following specifications.EMU25711

Battery specifications

EMU25730

Without a rectifier or Rectifier Regula-tor

CAUTION:ECM01090

A battery cannot be connected to modelsthat do not have a rectifier or RectifierRegulator.

If you wish to use a battery with the modelswithout a rectifier or Rectifier Regulator, installan optional Rectifier Regulator.Using a maintenance-free battery with theabove models can shorten the life of the bat-tery significantly.Install an optional Rectifier Regulator or useaccessories rated to withstand 18 volts orhigher with the above models. Consult yourYamaha dealer for details on installing an op-tional Rectifier Regulator.EMU25742

Propeller selectionThe performance of your outboard motor willbe critically affected by your choice of propel-ler, as an incorrect choice could adversely af-fect performance and could also seriouslydamage the motor. Engine speed depends onthe propeller size and boat load. If enginespeed is too high or too low for good engineperformance, this will have an adverse effecton the engine.Yamaha outboard motors are fitted with pro-pellers chosen to perform well over a range ofapplications, but there may be uses where apropeller with a different pitch would be moreappropriate. For a greater operating load, asmaller-pitch propeller is more suitable as itenables the correct engine speed to be main-tained. Conversely, a larger-pitch propeller ismore suitable for a smaller operating load.

Minimum cold cranking amps (CCA/SAE):

T8EH 245.0 AT8PH 245.0 AT8PR 245.0 A

Minimum marine cranking amps (MCA/ABYC):

T8EH 323.0 AT8PH 323.0 AT8PR 323.0 A

Minimum reserve capacity (RC/SAE):T8EH 52 minutesT8PH 52 minutesT8PR 52 minutes

ZMU01710

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General information

12

Yamaha dealers stock a range of propellers,and can advise you and install a propeller onyour outboard that is best suited to your appli-cation.

NOTE:Select a propeller which will allow the engineto reach the middle or upper half of the oper-ating range at full throttle with the maximumboat load. If operating conditions such as lightboat loads then allow the engine r/min to riseabove the maximum recommended range, re-duce the throttle setting to maintain the en-gine in the proper operating range.

For instructions on propeller removal and in-stallation, see page 61.EMU25770

Start-in-gear protectionYamaha outboard motors or Yamaha-ap-proved remote control units are equipped withstart-in-gear protection device(s). This featurepermits the engine to be started only when itis in neutral. Always select neutral beforestarting the engine.

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

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

ZMU04606

-x1 2 3

ZMU04604

-x1 2 3

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Basic components

13

EMU25797

Main components

NOTE:* May not be exactly as shown; also may not be included as standard equipment on all models.

F6, F8

1. Top cowling2. Top cowling lock lever3. Anti-cavitation plate4. Propeller*5. Cooling water inlet6. Drain screw7. Trim rod8. Clamp bracket9. Manual starter handle10.Warning indicator11.Engine stop button/Engine stop lanyard

switch12.Gear shift lever13.Tiller handle14.Steering friction lever15.Tilt lock lever

16.Clamp screw17.Rope attachment18.Flushing device19.Choke knob

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Basic components

14

T8

EMU25802

Fuel tankIf your model was equipped with a portablefuel tank, its function is as follows.

WARNINGEWM00020

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.

1. Top cowling2. Top cowling lock lever3. Anti-cavitation plate4. Propeller5. Cooling water inlet6. Drain screw7. Trim rod8. Clamp bracket9. Power tilt switch*10.Manual starter handle*11.Warning indicator12.Starter button*13.Engine stop button/Engine stop lanyard

switch*14.Gear shift lever*15.Tiller handle*16.Steering friction lever*17.Tilt lock lever*18.Clamp screw19.Rope attachment20.Flushing device

21.Choke knob22.Remote control box (side mount type)*

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Basic components

15

EMU25830

Fuel jointThis joint is used to connect the fuel line.EMU25841

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.EMU25850

Fuel tank capThis cap seals the fuel tank. When removed,the tank can be filled with fuel. To remove thecap, turn it counterclockwise.EMU25860

Air vent screwThis screw is on the fuel tank cap. To loosenthe screw, turn it counterclockwise.EMU26180

Remote controlThe remote control lever actuates both theshifter and the throttle. The electrical switchesare mounted on the remote control box.

EMU26190

Remote control leverMoving the lever forward from the neutral po-sition engages forward gear. Pulling the leverback from neutral engages reverse. The en-gine will continue to run at idle until the leveris moved about 35° (a detent can be felt).Moving the lever farther opens the throttle,and the engine will begin to accelerate.

1. Air vent screw2. Fuel gauge3. Fuel joint4. Fuel tank cap

ZMU01992

3 24 1

1. Power tilt switch2. Remote control lever3. Neutral interlock trigger4. Neutral throttle lever5. Main switch / choke switch6. Engine stop lanyard switch7. Throttle friction adjuster

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

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Basic components

16

EMU26201

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

EMU26211

Neutral throttle leverTo open the throttle without shifting into eitherforward or reverse, put the remote control le-ver in the neutral position and lift the neutralthrottle lever.

NOTE: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.

EMU26221

Choke switchTo activate the choke system, press in themain switch while the key is turned to the “ ”(on) or “ ” (start) position. The choke sys-tem will then supply the rich fuel mixture re-quired to start the engine. When the key isreleased, the choke will switch off automati-cally.

EMU25911

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

EMU25922

Gear shift leverPulling the gear shift lever towards you putsthe engine in forward gear so that the boatmoves ahead. Pushing the lever away fromyou puts the engine in reverse gear so that theboat moves astern.

1. Neutral interlock trigger

1. Fully open2. Fully closed

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Basic components

17

EMU25941

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

EMU25961

Throttle indicatorThe fuel consumption curve on the throttle in-dicator shows the relative amount of fuel con-sumed for each throttle position. Choose thesetting that offers the best performance andfuel economy for the desired operation.

EMU25971

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.

WARNINGEWM00031

Do not 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.

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

1. Throttle indicator

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Basic components

18

When constant speed is desired, tighten theadjuster to maintain the desired throttle set-ting.EMU25990

Engine stop lanyard switchThe lock plate must be attached to the enginestop switch for the engine to run. The lanyardshould be attached to a secure place on theoperator’s clothing, or arm or leg. Should theoperator fall overboard or leave the helm, thelanyard will pull out the lock plate, stopping ig-nition to the engine. This will prevent the boatfrom running away under power.

WARNINGEWM00120

� Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg while operating.

� Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

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

NOTE:The engine cannot be started with the lockplate removed.

EMU26001

Engine stop buttonTo open the ignition circuit and stop the en-gine, push this button.

1. Lanyard2. Lock plate

1. Lanyard2. Lock plate

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Basic components

19

EMU26011

Choke knob for pull typeTo supply the engine with the rich fuel mixturerequired to start, pull out this knob.

EMU26070

Manual starter handleTo start the engine, first gently pull the handleout until resistance is felt. From that position,then pull the handle straight out quickly tocrank the engine.

EMU26080

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

EMU26090

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) position,the electrical circuits are on, and the key can-not 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.

EMU26102

Power tilt switchThe power tilt system adjusts the outboardmotor angle in relation to the transom. Push-ing the switch “ ” (up) tilts the outboard mo-

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Basic components

20

tor up. Pressing the switch “ ” (down) tiltsthe outboard motor down. When the switch isreleased, the outboard motor will stop in itscurrent position.

NOTE:For instructions on using the power tilt switch,see pages 37 and 40.

EMU31430

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 thetiller handle bracket.To increase resistance, turn the lever to theport side “A”.To decrease resistance, turn the lever to thestarboard side “B”.

WARNINGEWM00040

Do not overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to steer, which could result in anaccident.

If the resistance does not increase even whenthe lever is turned to the port side “A”, makesure that the nut is tightened to the specifiedtorque.

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Basic components

21

NOTE:� 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-juster.

EMU26261

Trim rod (tilt pin)The position of the trim rod determines theminimum trim angle of the outboard motor inrelation to the transom.

EMU30530

Tilt lock mechanismThe tilt lock mechanism is used to prevent theoutboard motor from lifting out of the waterwhen in reverse gear.

To lock it, set the tilt lock lever in the lock po-sition. To release, push the tilt lock lever in therelease position.EMU26320

Tilt support knobTo keep the outboard motor in the tilted up po-sition, push the tilt support knob under theswivel bracket.

EMU26330

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

1. Nut

Nut tightening torque:6.0 Nm (4.4 ft-lb) (0.61 kgf-m)

1. Tilt lock lever

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Basic components

22

EMU26360

Power tilt unitThis unit tilts the outboard motor up and downand is controlled with the power tilt switch.

CAUTION:ECM00630

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

EMU26382

Top cowling lock lever (pull up type)To remove the engine top cowling, pull up thelock lever(s) and lift off the cowling. When in-stalling the cowling, check to be sure it fitsproperly in the rubber seal. Then lock thecowling by moving the lever(s) downward.

EMU26460

Flushing deviceThis device is used to clean the cooling waterpassages of the motor using a garden hoseand tap water.

NOTE:For details on usage, see page 52.

EMU26301

Warning indicatorIf the engine develops a condition which iscause for warning, the indicator lights up. Fordetails on how to read the warning indicator,see page 23.

1. Power tilt unit2. Power tilt motor

1. Flushing device

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Basic components

23

EMU26503

Low oil pressure warning indicatorIf oil pressure drops too low, this indicator willflash. For further information, see page 23.

CAUTION:ECM00020

� Do not continue to run the engine if thelow oil pressure warning indicator is onand the engine oil level is lower. Seriousengine damage will occur.

� The low oil pressure warning indicatordoes not indicate the engine oil level.Use the oil dipstick to check the remain-ing oil quantity. For further information,see page 27.

EMU26801

Warning system

CAUTION:ECM00090

Do not continue to operate the engine if awarning device has activated. Consultyour Yamaha dealer if the problem cannotbe located and corrected.

EMU30167

Low oil pressure warningIf the oil pressure drops too low, the warningdevice will activate.Activation of warning device� The engine speed will automatically de-

crease to about 2000 r/min.� If equipped with a low oil pressure warning

indicator, it will light or blink.

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

If the warning system has activated, stop theengine as soon as it is safe to do so. Checkthe oil level and add oil as needed. If the oillevel is correct and the warning device doesnot switch off, consult your Yamaha dealer.

CAUTION:ECM00100

Do not continue to run the engine if thelow oil pressure warning indicator is on.Serious engine damage could occur.

1. Warning indicator

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Operation

24

EMU26901

Installation

CAUTION:ECM00110

Incorrect engine height or obstructions tosmooth water flow (such as the design orcondition of the boat, or accessories suchas transom ladders or depth finder trans-ducers) can create airborne water spraywhile the boat is cruising. Severe enginedamage may result if the motor is operat-ed continuously in the presence of air-borne water spray.

NOTE:During water testing check the buoyancy ofthe boat, at rest, with its maximum load.Check that the static water level on the ex-haust housing is low enough to prevent waterentry into the powerhead, when water risesdue to waves when the outboard is not run-ning.

EMU26910

Mounting the outboard motor

WARNINGEWM00820

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

� The information presented in this sec-tion is intended as reference only. It isnot possible to provide complete in-structions for every possible boat andmotor combination. Proper mountingdepends in part on experience and thespecific boat and motor combination.

WARNINGEWM00830

Improper mounting of the outboard motorcould result in hazardous conditions suchas poor handling, loss of control, or firehazards. Observe the following:� For permanently mounted models, your

dealer or other person experienced inproper rigging should mount the motor.If you are mounting the motor yourself,you should be trained by an experiencedperson.

� For portable models, your dealer or oth-er person experienced in proper out-board motor mounting should show youhow to mount your motor.

Mount the outboard motor on the center line(keel line) of the boat, and ensure that theboat itself is well balanced. Otherwise theboat will be hard to steer. For boats without akeel or which are asymmetrical, consult yourdealer.

EMU26920

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, cavitation

1. Center line (keel line)

ZMU017601

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Operation

25

tends 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 and alevel 25 mm (1 in.) below it.

NOTE:� The optimum mounting height of the out-

board motor is affected by the boat and mo-tor combination and the desired use. Testruns at different heights can help determinethe optimum mounting height. Consult yourYamaha dealer or boat manufacturer forfurther information on determining the prop-er mounting height.

� For instructions on setting the trim angle ofthe outboard motor, see page 37.

EMU26970

Clamping the outboard motor1. Place the outboard motor on the transom

so that it is positioned as close to the cen-ter as possible. Tighten the transomclamp screws evenly and securely. Oc-casionally check the clamp screws fortightness during operation of the out-board motor because they could becomeloose due to engine vibration.

WARNINGEWM00640

Loose clamp screws could allow the out-board motor to fall off or move on the tran-som. This could cause loss of control andserious injury. Make sure the transomscrews are tightened securely. Occasion-ally check the screws for tightness duringoperation.

2. If the engine restraint cable attachment isequipped on your engine, an engine re-straint cable or chain should be used. At-tach one end to the engine restraint cableattachment and the other to a securemounting point on the boat. Otherwisethe engine could be completely lost if itaccidentally falls off the transom.

ZMU02011

0–25mm(0–1in.)

ZMU02012

ZMU02013

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Operation

26

3. Secure the clamp bracket to the transomusing the bolts provided with the out-board (if packed). For details, consultyour Yamaha dealer.

WARNINGEWM00650

Avoid using bolts, nuts or washers otherthan those contained in the engine pack-aging. If used, they must be of at least thesame quality of material and strength andmust be tightened securely. After tighten-ing, test run the engine and check theirtightness.

EMU30173

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

CAUTION:ECM00800

Failure to follow the break-in procedurecould result in reduced engine life or evensevere engine damage.

EMU27081

Procedure for 4-stroke modelsRun the engine under load (in gear with a pro-peller installed) for 10 hours as follows.

1. First hour:Run the engine at 2000 r/min or at ap-proximately half throttle.

2. Second hour:Run the engine at 3000 r/min or at ap-proximately three-quarter throttle.

3. Remaining eight 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.

EMU27102

Preoperation checks

WARNINGEWM00080

If any item in the preoperation check is notworking properly, have it inspected andrepaired before operating the outboardmotor. Otherwise an accident could occur.

CAUTION:ECM00120

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

EMU27111

Fuel� Check to be sure you have plenty of fuel for

your trip.� Make sure there are no fuel leaks or gaso-

line fumes.� Check fuel line connections to be sure they

are tight (if equipped Yamaha fuel tank orboat tank).

� Be sure the fuel tank is positioned on a se-cure, flat surface, and that the fuel line is nottwisted or flattened, or likely to contactsharp objects (if equipped Yamaha fueltank or boat tank).

1. Bolts

1

ZMU02014

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Operation

27

EMU27130

Controls� Check throttle, shift, and steering for proper

operation before starting the engine.� The controls should work smoothly, without

binding or unusual free play.� Look for loose or damaged connections.� Check operation of the starter and stop

switches when the outboard motor is in thewater.

EMU27140

Engine� Check the engine and engine mounting.� Look for loose or damaged fasteners.� Check the propeller for damage.EMU27163

Checking the engine oil level1. Put the outboard motor in an upright po-

sition (not tilted).2. Remove oil dipstick and wipe it clean.3. Completely insert the dipstick and re-

move it again.4. Check the oil level using the dipstick to be

sure the level falls between the upper andlower marks. Fill with oil if it is below thelower mark, or drain to the specified levelif it is above the upper mark.

NOTE:Be sure to completely insert the dipstick intothe dipstick guide.

EMU27433

Filling fuel

WARNINGEWM00060

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

1. Remove the fuel tank cap.2. Carefully fill the fuel tank.3. Securely close the cap after filling the

tank. Wipe up any spilled fuel.

1. Lower level mark2. Oil dipstick3. Upper level mark

ZMU02082

13

2

Fuel tank capacity:12.0 L (3.17 US gal) (2.64 Imp.gal)

ZMU04484

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Operation

28

EMU27270

Ring Free Fuel AdditiveGasoline is a precise blend of many differentsubstances, each chosen to give certain char-acteristics. Gasoline blends have beenchanging in recent years in response to con-cerns about pollution and resulting emissionsregulations. One of the most obvious changeshas been the elimination of lead from most fu-els.As gasoline has changed, the amount of addi-tives such as aromatics and oxygenates hasincreased. These additives are important forthe engines in passenger cars, but they canhave detrimental effects in marine engines,because of increased deposits in the combus-tion chamber. When enough deposits collect,piston rings begin sticking. Performancedrops and engine wear increases dramatical-ly.While many additives available may reducedeposits, Yamaha recommends the use ofRing Free Fuel Additive, available from yourYamaha dealer. Ring Free Fuel Additivehas repeatedly proven its ability to clean com-bustion deposits from inside the engine, nota-bly the critical piston-ring-land area, and fuelsystem components. Follow product labelingfor use instructions.EMU27450

Operating engineEMU27461

Feeding fuel (portable tank)

WARNINGEWM00420

� 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 vapors

are flammable and explosive. Refrainfrom smoking, and keep away fromopen flames and sparks while looseningthe air vent screw.

� This product emits exhaust gases whichcontain carbon monoxide, a colorless,odorless gas which could cause braindamage or death when inhaled. Symp-toms include nausea, dizziness, anddrowsiness. Keep cockpit and cabin ar-eas well ventilated. Avoid blocking ex-haust outlets.

1. If there is an air vent screw on the fueltank cap, loosen it 2 or 3 turns.

2. If there is a fuel joint on the motor, firmlyconnect the fuel line to the joint. Thenfirmly connect the other end of the fuelline to the joint on the fuel tank.

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Operation

29

3. If a steering friction adjuster is providedon your outboard motor, securely attachthe fuel line to the fuel line clamp.

NOTE:During engine operation place the tank hori-zontally, otherwise fuel cannot be drawn fromthe fuel tank.

4. Squeeze the primer pump with the outletend up until you feel it become firm.

EMU27490

Starting engineEMU27505

Manual start models (tiller control)1. Place the gear shift lever in neutral.

NOTE:The start-in-gear protection device preventsthe engine from starting except when in neu-tral.

2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-gine stop switch.

WARNINGEWM00120

� Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg while operating.

� Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

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

ZMU02024

ZMU02025

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Operation

30

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

4. Pull out / turn the choke knob fully. Afterthe engine starts, replace / return theknob to the home position.

NOTE:� It is not necessary to use the choke when

starting a warm engine.

� If the choke knob is left in the “ ” (start)position while the engine is running, the en-gine will run poorly or stall.

5. Pull the manual starter handle slowly untilyou feel resistance. Then give a strongpull straight out to crank and start the en-gine. Repeat if necessary.

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

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

NOTE:� When the engine is cold, it needs to be

warmed up. For further information, seepage 34.

� 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) and try

ZMU02030

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Operation

31

again. Also if the engine is warm and fails tostart, open the throttle a same amount andtry to start the engine again. If the enginestill fails to start, see page 68.

EMU27562

Electric start models1. Place the gear shift lever in neutral.

NOTE:The start-in-gear protection device preventsthe engine from starting except when in neu-tral.

2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-gine stop switch.

WARNINGEWM00120

� Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg while operating.

� Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

� Avoid accidentally pulling the lanyardduring 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.

3. Place the throttle grip in the “ ”(start) position. After the engine starts, re-turn the throttle to the fully closed posi-tion.

4. Pull out / turn the choke knob fully. Afterthe engine starts, replace / return theknob to the home position.

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Operation

32

NOTE:� It is not necessary to use the choke when

starting a warm engine.� If the choke knob is left in the “ ” (start)

position while the engine is running, the en-gine will run poorly or stall.

5. Push the starter button to start the motor.(Repeat if necessary.)

6. Immediately after the engine starts, re-lease the starter button to allow it to re-turn to its original position.

7. Slowly return the throttle grip to the fullyclosed position so that the engine doesnot stall.

CAUTION:ECM00160

� Never push the starter button while theengine is running.

� Do not keep the starter motor turning formore than 5 seconds. If the starter motoris turned continuously for more than 5seconds, the battery will be quickly dis-charged, thus making it impossible tostart the engine. The starter can also bedamaged. If the engine will not start after5 seconds of cranking, release the start-er button, wait 10 seconds, then crankthe engine again.

NOTE:� When the engine is cold, it needs to be

warmed up. For further information, seepage 34.

� 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) and tryagain. Also if the engine is warm and fails tostart, open the throttle a same amount andtry to start the engine again. If the enginestill fails to start, see page 68.

EMU27642

Electric start / remote control models1. Place the remote control lever in neutral.

NOTE:The start-in-gear protection device preventsthe engine from starting except when in neu-tral.

ZMU02030

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Operation

33

2. Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg. Then install the lock plate onthe other end of the lanyard into the en-gine stop switch.

WARNINGEWM00120

� Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg while operating.

� Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from functioning.

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

3. Turn the main switch to “ ” (on).

4. Open the throttle slightly without shiftingusing the neutral throttle lever or free ac-celerator. You may need to change thethrottle opening slightly depending on en-gine temperature. After the engine starts,return the throttle to the original position.

NOTE:� On remote controls equipped with a neutral

throttle lever, a good starting point is to liftthe lever just until you feel resistance, thenlift slightly more.

� The neutral throttle lever or free acceleratorcan only be used when the remote controllever is in neutral.

5. Press in and hold the main switch to op-erate the remote choke system. The re-mote choke switch automatically returnsto its normal position when you releaseyour hand. Therefore keep the switchpressed in.

OFF

ON

ZMU01880

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Operation

34

NOTE:� It is not necessary to use the choke when

starting a warm engine.� Push in the main switch fully, or the remote

choke system will not operate.

6. Turn the main switch to “ ” (start),and hold it for a maximum of 5 seconds.

7. Immediately after the engine starts, re-lease the main switch and allow it to re-turn to “ ” (on).

CAUTION:ECM00191

� Never turn the main switch to “ ”(start) while the engine is running.

� Do not keep the starter motor turning formore than 5 seconds. If the starter motoris turned continuously for more than 5seconds, the battery will be quickly dis-charged, thus making it impossible tostart the engine. The starter can also be

damaged. If the engine will not start after5 seconds of cranking, return the mainswitch to “ ” (on), wait 10 seconds,then crank the engine again.

EMU27670

Warming up engineEMU27732

Manual start models1. After starting the engine, return the choke

knob to the halfway position. For approx-imately the first 5 minutes after starting,warm up the engine by operating at onefifth throttle or less. After the engine haswarmed up, push the choke knob in fully.Failure to do so will shorten engine life.

NOTE:� If the choke knob is left pulled out after the

engine starts, the engine will stall.� In temperatures of -5°C or less, leave the

choke knob pulled out fully for approximate-ly 30 seconds after starting.

2. Check for a steady flow of water from thecooling water pilot hole.

CAUTION:ECM00511

A continuous flow of water from the cool-ing water pilot hole shows that the waterpump is pumping water through the cool-ing passages. If water is not flowing out ofthe hole at all times while the engine isrunning, overheating and serious damagecould occur. Stop the engine and checkwhether the cooling water inlet on the low-er case or the cooling water pilot hole isblocked. Consult your Yamaha dealer ifthe problem cannot be located and cor-rected.

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Operation

35

EMU27740

Shifting

WARNINGEWM00180

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

CAUTION:ECM00220

To change the boat direction or shiftingposition from forward to reverse or vice-versa, first close the throttle so that the en-gine idles (or runs at low speeds).

EMU27764

Forward (tiller handle and remote con-trol models)Tiller handle models1. Place the throttle grip in the fully closed

position.

2. Move the gear shift lever quickly and firm-ly from neutral to forward.

Remote control modelsPull up the neutral interlock trigger (ifequipped) and move the remote control leverquickly and firmly from neutral to forward.

EMU27796

Reverse (manual tilt and hydro tilt models)

WARNINGEWM00190

When operating in reverse, go slowly. Donot open the throttle more than half. Other-wise the boat could become unstable,which could result in loss of control andan accident.

Tiller handle models1. Place the throttle grip in the fully closed

position.

ZMU02030

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Operation

36

2. On models equipped with a tilt lock lever,check that it is in the lock/down position.

3. Move the gear shift lever quickly and firm-ly from neutral to reverse.

Remote control models1. Check that the tilt lock lever is in the lock

position.

2. Pull up the neutral interlock trigger (ifequipped) and move the remote controllever quickly and firmly from neutral to re-verse.

EMU27820

Stopping engineBefore stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-ping the engine immediately after operating athigh speed is not recommended.EMU27832

Procedure1. Push and hold the engine stop button un-

til the engine comes to a complete stop.

ZMU02030

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Operation

37

2. After stopping the engine, tighten the airvent screw on the fuel tank cap and setthe fuel cock lever or knob to the closedposition, if equipped.

3. Disconnect the fuel line if you are usingan external fuel tank.

NOTE:If the outboard motor is equipped with an en-gine stop switch lanyard, the engine can alsobe stopped by pulling the lanyard and remov-ing the lock plate from the engine stop switch.

EMU27852

Procedure1. Turn the main switch to “ ” (off).

2. After stopping the engine, disconnect thefuel line or close the fuel cock if there is afuel joint or a fuel cock on the boat.

3. Tighten the air vent screw on the fuel tankcap (if equipped).

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

NOTE:The engine can also be stopped by pulling thelanyard and removing the clip from the enginestop switch, then turning the main switch to“ ” (off).

EMU27861

Trimming outboard motorThe 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 trim an-gle depends upon the combination of boat,

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Operation

38

engine, and propeller. Correct trim is also af-fected by variables such as the load in theboat, sea conditions, and running speed.

WARNINGEWM00740

Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can make steer-ing the boat more difficult. This increasesthe possibility of an accident. If the boatbegins to feel unstable or is hard to steer,slow down and/or readjust the trim angle.

EMU27872

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 bracket.

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 different an-gles to find the position that works best foryour boat and operating conditions.

WARNINGEWM00400

� 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 instabilityor control problems. Improper trim an-gle can cause loss of control.

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

1. Trim operating angle

ZMU02043

1

1. Trim rod

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Operation

39

EMU27902

Adjusting trim angle (power tilt mod-els)

WARNINGEWM00751

� Be sure all people are clear of the out-board motor when adjusting the tilt an-gle, also be careful not to pinch anybody parts between the drive unit andclamp bracket.

� Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabilityor control problems. Improper trim an-gle 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 at acomplete stop with the engine off. Donot adjust the trim angle with this switchwhile the boat is moving.

Tilt the engine to the desired angle using thepower tilt switch.

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

To raise the bow (“trim-out”), tilt the engine up.To lower the bow (“trim-in”), tilt the enginedown.Make test runs with the trim set to different an-gles to find the position that works best foryour boat and operating conditions.EMU27911

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. The trim tab can

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Operation

40

also be adjusted to help offset this effect.When the bow of the boat is down, it is easierto accelerate from 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 more airdrag. Excessive trim-out can also cause thepropeller to ventilate, which reduces perfor-mance further, and the boat may “porpoise”(hop in the water), which could throw the op-erator and passengers overboard.

Bow DownToo much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Operat-ing with excessive trim-in at higher speedsalso makes the boat unstable. Resistance at

the bow is greatly increased, heightening thedanger of “bow steering” and making opera-tion difficult and dangerous.

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

EMU27933

Tilting up and downIf the engine will be stopped for some time orif the boat is moored in shallows, the outboardmotor should be tilted up to protect the propel-ler and casing from damage by collision withobstructions, and also to reduce salt corro-sion.

WARNINGEWM00220

Be sure all people are clear of the out-board motor when tilting up and down,also be careful not to pinch any body partsbetween the drive unit and engine bracket.

WARNINGEWM00250

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 a fewminutes. Otherwise fuel may leak.

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Operation

41

CAUTION:ECM00241

� Before tilting the outboard motor, stopthe engine by following the procedureon page 36. 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.

EMU27978

Procedure for tilting up (manual tilt models)1. Place the gear shift lever in neutral.

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

3. Place the tilt lock lever (if equipped) in therelease/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.

EMU28006

Procedure for tilting upPower trim and tilt models / power tilt models1. Place the remote control lever / gear shift

lever in neutral.

N

ZMU03196

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Operation

42

2. Disconnect the fuel line from the out-board motor or close the fuel cock.

3. Press the power trim and tilt switch / pow-er tilt switch “ ” (up) until the outboardmotor has tilted up completely.

4. Push the tilt support knob into the clampbracket or pull the tilt support lever towardyou to support the engine.

WARNINGEWM00260

After tilting the outboard motor, be sure tosupport it with the tilt support knob or tiltsupport lever. Otherwise the outboard mo-tor could fall back down suddenly if oil inthe power trim and tilt unit loses pressure.

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Operation

43

5. Models equipped with trim rods: Once theoutboard motor is supported with the tiltsupport lever, press the power trim andtilt switch / power tilt switch “ ” (down) toretract the trim rods.

CAUTION:ECM00250

Be sure to retract the trim rods completelyduring mooring. This protects the rodsfrom marine growth and corrosion whichcould damage the power trim and tiltmechanism.

EMU30192

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.EMU28054

Procedure for tilting downPower trim and tilt models / power tilt models1. Push the power trim and tilt switch / pow-

er tilt switch “ ” (up) until the outboardmotor is supported by the tilt rod and thetilt support lever / tilt support knob be-comes free.

2. Release the tilt support lever or pull outthe tilt support knob.

3. Push the power trim and tilt switch / pow-er tilt switch “ ” (down) to lower the out-board motor to the desired position.

DN

ZMU01936

UP

DN

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Operation

44

EMU28060

Cruising in shallow waterThe outboard motor can be tilted up partiallyto allow operation in shallow water.EMU28071

Cruising in shallow water (manual tilt models)

WARNINGEWM00710

� Place the gear shift in neutral before us-ing the shallow water cruising system.

� 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. Hit-ting an underwater obstacle couldcause the outboard motor to lift out ofthe water, resulting in loss of control.

� Do not rotate the outboard motor 180°and operate the boat in reverse. Placethe gear shift in reverse to operate theboat in reverse.

� 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 acci-dent and personal injury.

� Return the outboard motor to its normalposition as soon as the boat is back indeeper water.

CAUTION:ECM00260

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.

EMU28123

Procedure1. Place the gear shift lever in neutral.

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

ZMU02047

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Operation

45

3. Slightly tilt the outboard motor up. The tiltsupport bar will lock automatically, sup-porting the outboard motor in a partiallyraised position.

NOTE:This outboard motor has 2 positions for shal-low water cruising.

4. To return the outboard motor to the nor-mal running position, place the gear shiftlever in neutral, then place the tilt lock le-ver in the lock/down position.

5. Slightly tilt the outboard motor up until thetilt support bar automatically returns tothe free position.

6. Slowly lower the outboard motor to thenormal position.

EMU28090

Power trim and tilt models / power tilt modelsThe outboard motor can be tilted up partiallyto allow operation in shallow water.

WARNINGEWM00660

� Place the gear shift in neutral before set-ting up for shallow water cruising.

� Return the outboard motor to its normalposition as soon as the boat is back indeeper water.

CAUTION:ECM00260

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.

EMU28185

Procedure for power trim and tilt / powertilt models1. Place the remote control lever / gear shift

lever in neutral.

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Operation

46

2. Slightly tilt the outboard motor up to thedesired position using the power trim andtilt switch / power tilt switch.

3. To return the outboard motor to the nor-mal running position, press the powertrim and tilt switch / power tilt switch andslowly tilt the outboard motor down.

EMU28192

Cruising in other conditionsCruising in salt waterAfter operating in salt water, flush the coolingwater passages with fresh water to preventthem from becoming clogged with salt depos-its.

NOTE:For cooling system flushing instructions, seepage 49.

Cruising in turbid waterYamaha strongly recommends that you usethe optional chromium-plated water pump kit(not available for some models) if you use theoutboard motor in turbid or muddy water con-ditions.

UP

ZMU01935

UP

DN

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Maintenance

47

EMU31480

Specifications

NOTE:“(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.

EMU28218

Dimension:Overall length:

F6MH 1038 mm (40.9 in)F8MH 1038 mm (40.9 in)T8EH 1038 mm (40.9 in)T8PH 1038 mm (40.9 in)T8PR 552 mm (21.7 in)

Overall width:F6MH 371 mm (14.6 in)F8MH 371 mm (14.6 in)T8EH 371 mm (14.6 in)T8PH 371 mm (14.6 in)T8PR 312 mm (12.3 in)

Overall height S:F6MH 998 mm (39.3 in)F8MH 998 mm (39.3 in)

Overall height L:F6MH 1125 mm (44.3 in)F8MH 1125 mm (44.3 in)T8EH 1187 mm (46.7 in)T8PH 1187 mm (46.7 in)T8PR 1187 mm (46.7 in)

Overall height X:T8EH 1255 mm (49.4 in)T8PH 1255 mm (49.4 in)T8PR 1255 mm (49.4 in)

Transom height S:F6MH 435 mm (17.1 in)F8MH 435 mm (17.1 in)

Transom height L:F6MH 562 mm (22.1 in)F8MH 562 mm (22.1 in)T8EH 557 mm (21.9 in)T8PH 557 mm (21.9 in)T8PR 557 mm (21.9 in)

Transom height X:T8EH 625 mm (24.6 in)T8PH 625 mm (24.6 in)T8PR 625 mm (24.6 in)

Weight (AL) S:F6MH 38.0 kg (84 lb)F8MH 38.0 kg (84 lb)

Weight (AL) L:F6MH 39.5 kg (87 lb)F8MH 39.5 kg (87 lb)T8EH 46.5 kg (103 lb)T8PH 52.0 kg (115 lb)T8PR 49.0 kg (108 lb)

Weight (AL) X:T8EH 47.5 kg (105 lb)T8PH 53.0 kg (117 lb)T8PR 50.0 kg (110 lb)

Performance:Full throttle operating range:

F6MH 4500–5500 r/minF8MH 5000–6000 r/minT8EH 5000–6000 r/minT8PH 5000–6000 r/minT8PR 5000–6000 r/min

Maximum output:F6MH 4.4 kW@5000 r/min (6 HP@5000 r/min)F8MH 5.9 kW@5500 r/min (8 HP@5500 r/min)T8EH 5.9 kW@5500 r/min (8 HP@5500 r/min)T8PH 5.9 kW@5500 r/min (8 HP@5500 r/min)T8PR 5.9 kW@5500 r/min (8 HP@5500 r/min)

Idling speed (in neutral):1050 ±50 r/min

Engine:Type:

4-stroke LDisplacement:

197.0 cm³ (12.02 cu.in)Bore × stroke:

56.0 × 40.0 mm (2.20 × 1.57 in)Ignition system:

CDISpark plug (NGK):

BR6HS-10

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Maintenance

48

Spark plug gap:0.9–1.0 mm (0.035–0.039 in)

Control system:F6MH TillerF8MH TillerT8EH TillerT8PH TillerT8PR Remote control

Starting system:F6MH ManualF8MH ManualT8EH Manual and electricT8PH ElectricT8PR Electric

Starting carburetion system:Choke valve

Valve clearance (cold engine) IN:0.15–0.20 mm (0.0059–0.0079 in)

Valve clearance (cold engine) EX:0.20–0.25 mm (0.0079–0.0098 in)

Min. cold cranking amps (CCA/SAE):T8EH 245.0 AT8PH 245.0 AT8PR 245.0 A

Min. marine cranking amps (MCA/ABYC):T8EH 323.0 AT8PH 323.0 AT8PR 323.0 A

Min. reserve capacity (RC/SAE):T8EH 52 minutesT8PH 52 minutesT8PR 52 minutes

Alternator output:F8MH 80 W

Alternator output for battery DC:6.0 A

Drive unit:Gear positions:

Forward-neutral-reverseGear ratio:

F6MH 2.08 (27/13)F8MH 2.08 (27/13)T8EH 2.92 (38/13)T8PH 2.92 (38/13)T8PR 2.92 (38/13)

Trim and tilt system:F6MH Manual tiltF8MH Manual tiltT8EH Manual tiltT8PH Power tiltT8PR Power tilt

Propeller mark:F6MH NF8MH NT8EH RT8PH RT8PR R

Fuel and oil:Recommended fuel:

Regular unleaded gasolineMin. pump octane:

86Fuel tank capacity:

12.0 L (3.17 US gal) (2.64 Imp.gal)Recommended engine oil:

4-stroke outboard motor oilEngine oil grade API:

API SE, SF, SG, SH, SJ, SLEngine oil type SAE:

SAE10W30 or SAE10W40Lubrication:

Wet sumpEngine oil quantity (excluding oil filter):

0.8 L (0.85 US qt) (0.70 Imp.qt)Recommended gear oil:

Hypoid gear oil SAE#90Gear oil quantity:

F6MH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)F8MH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)T8EH 370.0 cm³ (12.51 US oz) (13.05 Imp.oz)T8PH 370.0 cm³ (12.51 US oz) (13.05 Imp.oz)T8PR 370.0 cm³ (12.51 US oz) (13.05 Imp.oz)

Tightening torque for engine:Spark plug:

25.0 Nm (18.4 ft-lb) (2.55 kgf-m)Propeller nut:

F6MH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)F8MH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)T8EH 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)T8PH 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)T8PR 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)

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Maintenance

49

Engine oil drain bolt:24.0 Nm (17.7 ft-lb) (2.45 kgf-m)

EMU28222

Transporting and storing out-board motor

WARNINGEWM00690

� Leaking fuel is a fire hazard. When trans-porting and storing the outboard motor,close the air vent screw and fuel cock toprevent fuel from leaking.

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

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

WARNINGEWM00700

Never get under the lower unit while it istilted, even if a motor support bar is used.Severe injury could occur if the outboardmotor accidentally falls.

CAUTION:ECM00660

Do not use the tilt support lever or knobwhen trailering the boat. The outboard mo-tor could 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 the tiltposition.

The outboard motor should be trailered andstored in the normal running position. If thereis insufficient road clearance in this position,then trailer the outboard motor in the tilt posi-

tion using a motor support device such as atransom saver bar. Consult your Yamahadealer for further details.EMU28235

Clamp screw mounting modelsWhen transporting or storing the outboardmotor while removed from a boat, keep theoutboard motor in the attitude shown.

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

EMU28241

Storing outboard motorWhen storing your Yamaha outboard motorfor prolonged periods of time (2 months orlonger), several important procedures mustbe performed to prevent excessive damage.

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Maintenance

50

It is advisable to have your outboard motorserviced by an authorized Yamaha dealer pri-or to storage. However, you, the owner, with aminimum of tools, can perform the followingprocedures.

CAUTION:ECM01080

� 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-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 through theexhaust port and cause engine trouble.

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

EMU28302

ProcedureEMU28372

Flushing in a test tank1. Wash the outboard motor body using

fresh water. For further information, seepage 53.

2. Fill the fuel tank with fresh fuel and addone ounce of “Yamaha Fuel Conditionerand Stabilizer” (Part No. LUB-FUELC-12-00) to each gallon of fuel.

NOTE:The use of “Yamaha Fuel Conditioner andStabilizer” eliminates the need to drain thefuel system. Consult your Yamaha dealer orother qualified mechanic if the fuel system isto be drained instead.

3. Remove the engine top cowling and si-lencer cover.

4. Install the outboard motor on the testtank.

5. Fill the tank with fresh water to above thelevel of the anti-cavitation plate.

CAUTION:ECM00300

Do not run the engine without supplying itwith cooling water. Either the engine waterpump will be damaged or the engine willbe damaged from overheating. Beforestarting the engine, be sure to supply wa-ter to the cooling water passages.

CAUTION:ECM00290

If the fresh water level is below the level ofthe anti-cavitation plate, or if the watersupply is insufficient, engine seizure mayoccur.

6. Cooling system flushing is essential toprevent the cooling system from cloggingup with salt, sand, or dirt. In addition, fog-ging of the engine is mandatory to pre-vent excessive engine damage due torust. Perform the flushing and fogging atthe same time.

1. Water surface2. Lowest water level

ZMU02051

1

2

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Maintenance

51

WARNINGEWM00090

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

� Keep hands, hair, and clothes away fromthe flywheel and other rotating partswhile the engine is running.

7. Run the engine at a fast idle for 10–15minutes in neutral position.

8. Just prior to turning off the engine, quicklyspray “Yamaha Stor-Rite Engine FoggingOil” (Part No. LUB-STRRT-12-00) alter-nately into each carburetor or the fogginghole of the silencer cover, if equipped.When properly done, the engine willsmoke excessively and almost stall.

9. Remove the outboard motor from the testtank.

10. Drain the cooling water completely out ofthe motor. Clean the body thoroughly.

11. Install the silencer cover/cap and topcowling.

EMU28400

Lubrication (except oil injection mod-els)1. Grease the spark plug threads and install

the spark plug(s) and torque to properspecification. For information on sparkplug installation, see page 56.

2. Change the gear oil. For instructions, seepage 63. Inspect the oil for the presenceof water that indicates a leaky seal. Sealreplacement should be performed by anauthorized Yamaha dealer prior to use.

3. Grease all grease fittings. For further de-tails, see page 56.

EMU28421

Cleaning and anticorrosion measures1. Wash down the exterior of the outboard

motor with fresh water and dry off com-pletely.

2. Spray the outboard motor exterior with“Yamaha Silicone Protectant” (Part No.LUB-SILCNE-13-00).

3. Wax the cowling with a non-abrasive waxsuch as “Yamaha Silicone Wax” (Part No.ACC-11000-15-02).

EMU28430

Battery care

WARNINGEWM00330

Battery electrolytic fluid is dangerous; itcontains sulfuric acid and therefore is poi-sonous and highly caustic.Always follow these preventive measures:� Avoid bodily contact with electrolytic

fluid as it can cause severe burns or per-manent eye injury.

� Wear protective eye gear when handlingor working near batteries.

Antidote (EXTERNAL):� SKIN - Flush with water.� EYES - Flush with water for 15 minutes

and get immediate medical attention.Antidote (INTERNAL):� Drink large quantities of water or milk

followed by milk of magnesia, beatenegg, or vegetable oil. Get immediatemedical attention.

Batteries also generate explosive hydro-gen gas; therefore, you should always fol-low these preventive measures:� Charge batteries in a well-ventilated ar-

ea.� Keep batteries away from fire, sparks, or

open flames (for example: weldingequipment, lighted cigarettes, and soon.)

� DO NOT SMOKE when charging or han-dling batteries.

KEEP BATTERIES AND ELECTROLYTICFLUID OUT OF REACH OF CHILDREN.

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Maintenance

52

Batteries vary among manufacturers. There-fore the following procedures may not alwaysapply. Consult your battery manufacturer’s in-structions.Procedure1. Disconnect and remove the battery from

the boat. Always disconnect the blacknegative cable first to prevent the risk ofshorting.

2. Clean the battery casing and terminals.Fill each cell to the upper level with dis-tilled water.

3. Store the battery on a level surface in acool, dry, well-ventilated place out of di-rect sunlight.

4. Once a month, check the specific gravityof the electrolyte and recharge as re-quired to prolong battery life.

EMU28442

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

CAUTION:ECM01530

Do not perform this procedure while theengine is running. The water pump may bedamaged and severe damage from over-heating can result.

1. After shutting off the engine, unscrew thegarden hose connector from the fitting onthe bottom cowling.

2. Screw the garden hose adapter onto agarden hose, which is connected to afresh water supply, and then connect it tothe 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 connector ontothe fitting on the bottom cowling. Tightenthe connector securely.

CAUTION:ECM00540

Do not leave the garden hose connectorloose on the bottom cowling fitting or letthe hose hang free during normal opera-tion. Water will leak out of the connector

1. Fitting2. Garden hose connector3. Garden hose adapter

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Maintenance

53

instead of cooling the engine, which cancause serious overheating. Be sure theconnector is tightened securely on the fit-ting after flushing the engine.

NOTE:� When flushing the engine with the boat in

the water, tilting up the outboard motor untilit is completely out of the water will achievebetter results.

� For cooling system flushing instructions,see page 49.

EMU28450

Cleaning the outboard motorAfter use, wash the exterior of the outboardmotor with fresh water. Flush the cooling sys-tem with fresh water.

NOTE:For cooling system flushing instructions, seepage 49.

EMU28460

Checking painted surface of motorCheck the motor for scratches, nicks, or flak-ing paint. Areas with damaged paint are morelikely to corrode. If necessary, clean and paintthe areas. A touch-up paint is available fromyour Yamaha dealer.

EMU28486

Periodic maintenance

WARNINGEWM01070

Be sure to turn off the engine when youperform maintenance unless otherwisespecified. If you or the owner is not famil-iar with machine servicing, this workshould be done by your Yamaha dealer orother qualified mechanic.

Maintenance, replacement, or repair of theemission control devices and systemsmay be performed by any marine enginerepair establishment or individual. All war-ranty repairs, however, including those tothe emission control system, must be per-formed by an authorized Yamaha marinedealership.A service manual is available for purchasethrough your Yamaha dealer for owners whohave the mechanical skills, tools, and otherequipment necessary to perform mainte-nance not covered by this owner’s manual.EMU28510

Replacement partsIf replacement parts are necessary, use onlygenuine Yamaha parts or parts of the sametype and of equivalent strength and materials.Any part of inferior quality may malfunction,and the resulting loss of control could endan-ger the operator and passengers. Yamahagenuine parts and accessories are availablefrom your Yamaha dealer.

ZMU02052

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Maintenance

54

EMU28522

Maintenance chartFrequency of maintenance operations may be adjusted according to the operating conditions,but the following table gives general guidelines. Refer to the sections in this chapter for expla-nations of each owner-specific action.

NOTE:When operating in salt water, turbid or muddy water, the engine should be flushed with cleanwater 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

10 hours (1 month)

50 hours (3 months)

100 hours (6 months)

200 hours (1 year)

Anode(s) (external) Inspection / replace-ment

Anode(s) (internal) Inspection / replace-ment

Battery Inspection / charging

Cooling water passag-es Cleaning

Cowling clamp Inspection

Fuel filter (disposable) Inspection / replace-ment

Fuel system Inspection

Fuel tank (Yamaha por-table tank) Inspection / cleaning

Gear oil Change

Greasing points Greasing

Idling speed (carbure-tor models) Inspection

Power trim and tilt unit Inspection

Propeller and cotter pin Inspection / replace-ment

Shift link / shift cable Inspection / adjustment

Thermostat Inspection / replace-ment

Throttle link / throttle cable / throttle pick-up timing

Inspection / adjustment

Water pump Inspection / replace-ment

Engine oil Inspection / change

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Maintenance

55

EMU28874

Maintenance chart (additional)

Oil filter (built into oil pan)

Inspection / cleaning / change

Spark plug(s) Cleaning / adjustment / replacement

Timing belt Inspection / replace-ment

Valve clearance (OHC, OHV) Inspection / adjustment

Item ActionsEvery

500 hours (2.5 years) 1000 hours (5 years)

Timing belt Replacement

Exhaust guide, exhaust manifold

Inspection / replace-ment

Item Actions

Initial Every

10 hours (1 month)

50 hours (3 months)

100 hours (6 months)

200 hours (1 year)

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Maintenance

56

EMU28931

GreasingYamaha marine grease (Water resistant grease)

EMU28952

Cleaning and adjusting spark plug

WARNINGEWM00560

When removing or installing a spark plug,

be careful not to damage the insulator. Adamaged insulator could allow externalsparks, which could lead to explosion orfire.

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Maintenance

57

The spark plug is an important engine compo-nent and is easy to inspect. The condition ofthe spark plug can indicate something aboutthe condition of the engine. For example, if thecenter electrode porcelain is very white, thiscould indicate an intake air leak or carburetionproblem in that cylinder. Do not attempt to di-agnose any problems yourself. Instead, takethe outboard motor to a Yamaha dealer. Youshould periodically remove and inspect thespark plug because heat and deposits willcause the spark plug to slowly break downand erode. If electrode erosion becomes ex-cessive, or if carbon and other deposits areexcessive, you should replace the spark plugwith another of the correct type.

Before fitting the spark plug, measure theelectrode gap with a wire thickness gauge;adjust the gap to specification if necessary.

When fitting the plug, always clean the gasketsurface and use a new gasket. Wipe off anydirt from the threads and screw in the sparkplug to the correct torque.

NOTE:If a torque-wrench is not available when youare fitting a spark plug, a good estimate of thecorrect torque is 1/4 to 1/2 a turn past finger-tight. Have the spark plug adjusted to the cor-rect torque as soon as possible with a torque-wrench.

EMU28962

Checking fuel system

WARNINGEWM00060

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

WARNINGEWM00910

Leaking fuel can result in fire or explosion.� Check for fuel leakage regularly.� If any fuel leakage is found, the fuel sys-

tem must be repaired by a qualified me-chanic. Improper repairs can make theoutboard unsafe to operate.

Check the fuel lines for leaks, crack, or mal-function. If a problem is found, your Yamahadealer or other qualified mechanic should re-pair it immediately.

Standard spark plug:BR6HS-10

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

Spark plug gap:0.9–1.0 mm (0.035–0.039 in)

Spark plug torque:25.0 Nm (18.4 ft-lb) (2.55 kgf-m)

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Maintenance

58

Checkpoints� Fuel system parts leakage� Fuel line joint leakage� Fuel line cracks or other damage� Fuel connector leakageEMU28990

Checking fuel filterCheck the fuel filter periodically. The fuel filteris a one piece, disposable type. If foreign mat-ter is found in the filter, replace it. For replace-ment of the fuel filter, consult your Yamahadealer.

EMU29041

Inspecting idling speed

WARNINGEWM00451

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

� Keep hands, hair, and clothes away fromthe flywheel and other rotating partswhile the engine is running.

CAUTION:ECM00490

This procedure must be performed whilethe outboard motor is in the water. A flush-ing attachment or test tank can be used.

A diagnostic tachometer should be used forthis procedure. Results may vary dependingon whether testing is conducted with theflushing attachment, in a test tank, or with theoutboard motor in the water.1. Start the engine and allow it to warm up

fully in neutral until it is running smoothly.

NOTE:Correct idling speed inspection is only possi-ble if the engine is fully warmed up. If notwarmed up fully, the idle speed will measurehigher than normal. If you have difficulty veri-fying the idle speed, or the idle speed requiresadjustment, consult a Yamaha dealer or otherqualified mechanic.

2. Verify whether the idle speed is set tospecification. For idle speed specifica-tions, see page 47.

EMU29073

Changing engine oil

WARNINGEWM00760

� Avoid draining the engine oil immediate-ly after stopping the engine. The oil ishot and should be handled with care toavoid burns.

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Maintenance

59

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

CAUTION:ECM00970

� Do not overfill the oil, and be sure theoutboard motor is upright (not tilted)when checking and changing the engineoil.

� If the oil level is above the upper levelmark, drain until the level meets thespecified capacity. Overfilling the oilcould cause leakage or damage.

CAUTION:ECM01240

Change the engine oil after the first 10hours of operation, and every 100 hours orat 6-month intervals thereafter. Otherwisethe engine will wear quickly.

NOTE:Change the engine oil when the oil is stillwarm.

1. Put the outboard motor in an upright po-sition (not tilted).

2. Prepare a suitable container that holds alarger amount than the engine oil capaci-ty. Loosen and remove the drain screwwhile holding the container under the

drain hole. Then remove the oil filler cap.Let the oil drain completely. Wipe up anyspilled oil immediately.

3. Put a new gasket on the oil drain screw.Apply a light coat of oil to the gasket andinstall the drain screw.

NOTE:If a torque wrench is not available when youare installing the drain screw, finger tightenthe screw just until the gasket comes into con-tact with the surface of the drain hole. Thentighten 1/4 to 1/2 turn more. Tighten the drainscrew to the correct torque with a torquewrench as soon as possible.

4. Add the correct amount of oil through thefiller hole. Install the filler cap.

1. Drain screw

Drain screw tightening torque:24.0 Nm (17.7 ft-lb) (2.45 kgf-m)

Recommended engine oil:4-stroke outboard motor oil

Engine oil quantity (excluding oil filter):0.8 L (0.85 US qt) (0.70 Imp.qt)

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Maintenance

60

5. Start the engine and watch to make surethe low oil pressure warning indicator (ifequipped) turns off. Make sure that thereare no oil leaks.

CAUTION:ECM00680

If the low oil pressure warning indicatordoes not turn off or if there are oil leaks,stop the engine and find the cause. Con-tinued operation with a problem couldcause severe engine damage. Consultyour Yamaha dealer if the problem cannotbe located and corrected.

6. Turn off the engine and wait 3 minutes.Recheck the oil level using the dipstick tobe sure the level falls between the upperand lower marks. Fill with oil if it is belowthe lower mark, or drain to the specifiedlevel if it is above the upper mark.

7. Dispose of used oil according to localregulations.

NOTE:� 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.

EMU29112

Checking wiring and connectors� Check that each grounding wire is properly

secured.� Check that each connector is engaged se-

curely.

EMU29120

Exhaust leakageStart the engine and check that no exhaustleaks from the joints between the exhaustcover, cylinder head, and body cylinder.EMU29130

Water leakageStart the engine and check that no waterleaks from the joints between the exhaustcover, cylinder head, and body cylinder.EMU29140

Engine oil leakageCheck for oil leaks on the around the engine.

NOTE:If any leaks are found, consult your Yamahadealer.

1. Oil filler cap

ZMU02058

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Maintenance

61

EMU29163

Checking power trim and tilt / power tilt system

WARNINGEWM00430

� Never get under the lower unit while it istilted, even when the tilt support lever islocked. Severe injury could occur if theoutboard motor accidentally falls.

� Make sure no one is under the outboardmotor before performing this test.

1. Check the power trim and tilt unit / powertilt unit for any sign of oil leaks.

2. Operate each of the power trim and tiltswitches / power tilt switches to checkthat all switches work.

3. Tilt the outboard motor up and check thatthe trim and tilt rod / the tilt rod is pushedout completely.

4. Check that the trim and tilt rod / the tilt rodis free of corrosion or other flaws.

5. Tilt the outboard motor down. Check thatthe trim and tilt rod / the tilt rod operatessmoothly.

NOTE:Consult your Yamaha dealer if any operationis abnormal.

EMU29171

Checking propeller

WARNINGEWM00321

You could be seriously injured if the en-gine accidentally starts when you are nearthe propeller.� Before inspecting, removing, or install-

ing the propeller, remove the spark plugcaps from the spark plugs. Also, placethe shift control in neutral, turn the mainswitch to “ ” (off) and remove the key,and remove the lanyard from the enginestop switch. Turn off the battery cut-offswitch if your boat has one.

� Do not use your hand to hold the propel-ler when loosening or tightening thepropeller nut. Put a wood block betweenthe anti-cavitation plate and the propel-ler to prevent the propeller from turning.

Checkpoints

1. Tilt rod

ZMU01897

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Maintenance

62

� Check each of the propeller blades forwear, erosion from cavitation or ventilation,or other damage.

� Check the propeller shaft for damage.� Check the splines / shear pin for wear or

damage.� Check for fish line tangled around the pro-

peller shaft.

� Check the propeller shaft oil seal for dam-age.

NOTE:If the shear pin equipped: it is designed tobreak if the propeller hits a hard underwaterobstacle to help protect the propeller anddrive mechanism. The propeller will then spinfreely on the shaft. If this happens, the shearpin must be replaced.

EMU30660

Removing the propellerEMU29194

Spline models1. Straighten the cotter pin and pull it out us-

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

spacer (if equipped).

3. Remove the propeller and thrust washer.EMU30670

Installing the PropellerEMU29231

Spline models

CAUTION:ECM00340

� Be sure to install the thrust washer be-fore installing the propeller, otherwisethe lower case and propeller boss couldbe damaged.

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

1. Cotter pin2. Propeller nut3. Washer4. Spacer5. Propeller6. Thrust washer

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Maintenance

63

� Be sure to use a new cotter pin and bendthe ends over securely. Otherwise thepropeller could come off during opera-tion and be lost.

1. Apply Yamaha marine grease or a corro-sion resistant grease to the propellershaft.

2. Install the spacer (if equipped), thrustwasher, and propeller on the propellershaft.

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

4. Align the propeller nut with the propellershaft hole. Insert a new cotter pin in thehole and bend the cotter pin ends.

NOTE:If the propeller nut does not align with the pro-peller shaft hole after tightening to the speci-fied torque, tighten the nut further to align itwith the hole.

EMU29282

Changing gear oil

WARNINGEWM00800

� 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 it istilted, even when the tilt support lever orknob is locked. Severe injury could oc-cur if the outboard motor accidentallyfalls.

1. Tilt the outboard motor so that the gear oildrain screw is at the lowest point possi-ble.

2. Place a suitable container under the gearcase.

3. Remove the gear oil drain screw and gas-ket.

NOTE:� 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.

CAUTION:ECM00710

Inspect the used oil after it has beendrained. If the oil is milky, water is gettinginto the gear case which can cause geardamage. Consult a Yamaha dealer for re-pair of the lower unit seals.

1. Gear oil drain screw2. Oil level plug

ZMU02064

2

1

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Maintenance

64

NOTE:For disposal of used oil, consult your Yamahadealer.

5. With the outboard motor in a vertical po-sition, and using a flexible or pressurizedfilling 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.

EMU29302

Cleaning fuel tank

WARNINGEWM00920

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 approved con-tainer.

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 jointassembly. Pull the assembly out of thetank.

Recommended gear oil:Hypoid gear oil SAE#90

Gear oil quantity:F6MH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)F8MH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)T8EH 370.0 cm³ (12.51 US oz) (13.05 Imp.oz)T8PH 370.0 cm³ (12.51 US oz) (13.05 Imp.oz)T8PR 370.0 cm³ (12.51 US oz) (13.05 Imp.oz)

ZMU02065

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Maintenance

65

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.

EMU29312

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.

CAUTION:ECM00720

Do not paint anodes, as this would renderthem ineffective.

NOTE:Inspect ground leads attached to external an-odes on equipped models. Consult a Yamahadealer for inspection and replacement of inter-nal anodes attached to the power unit.

EMU29320

Checking battery (for electric start models)

WARNINGEWM00330

Battery electrolytic fluid is dangerous; itcontains sulfuric acid and therefore is poi-sonous and highly caustic.Always follow these preventive measures:� Avoid bodily contact with electrolytic

fluid as it can cause severe burns or per-manent eye injury.

� Wear protective eye gear when handlingor working near batteries.

Antidote (EXTERNAL):� SKIN - Flush with water.� EYES - Flush with water for 15 minutes

and get immediate medical attention.Antidote (INTERNAL):

ZMU02067

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Maintenance

66

� Drink large quantities of water or milkfollowed by milk of magnesia, beatenegg, or vegetable oil. Get immediatemedical attention.

Batteries also generate explosive hydro-gen gas; therefore, you should always fol-low these preventive measures:� Charge batteries in a well-ventilated ar-

ea.� Keep batteries away from fire, sparks, or

open flames (for example: weldingequipment, lighted cigarettes, and soon.)

� DO NOT SMOKE when charging or han-dling batteries.

KEEP BATTERIES AND ELECTROLYTICFLUID OUT OF REACH OF CHILDREN.

CAUTION:ECM00360

� A poorly maintained battery will quicklydeteriorate.

� Ordinary tap water contains mineralsharmful to a battery, and should not beused for topping up.

1. Check the electrolyte level at least once amonth. Fill to the manufacturer’s recom-mended level when necessary. Top uponly with distilled water (or pure de-ion-ized water suitable to use in batteries).

2. Always keep the battery in a good state ofcharge. Installing a voltmeter will helpyou monitor your battery. If you will notuse the boat for a month or more, removethe battery from the boat and store it in acool, dark place. Completely rechargethe battery before using it.

3. If the battery will be stored for longer thana month, check the specific gravity of thefluid at least once a month and rechargethe battery when it is low.

NOTE:Consult a Yamaha dealer when charging orre-charging batteries.

EMU29331

Connecting the battery

WARNINGEWM00570

Mount the battery holder securely in a dry,well-ventilated, vibration-free location inthe boat. Install a fully charged battery inthe holder.

CAUTION:ECM01121

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

� Reversal of the battery cables will dam-age the electrical parts.

� Connect the red battery cable first wheninstalling the battery and disconnect theblack battery cable first when removingit. Otherwise, the electrical parts can bedamaged.

� The electrical contacts of the batteryand cables must be clean and properlyconnected, or the battery will not startthe engine.

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Maintenance

67

Connect the red battery cable to the POSI-TIVE (+) terminal first. Then connect the blackbattery cable to the NEGATIVE (-) terminal.

EMU29370

Disconnecting the batteryDisconnect the BLACK cable from the NEGA-TIVE (-) terminal first. Then disconnect theRED cable from the POSITIVE (+) terminal.EMU29390

Checking top cowlingCheck the fitting of the top cowling by pushingit with both hands. If it is loose have it repairedby your Yamaha dealer.

EMU29400

Coating the boat bottomA clean hull improves boat performance. Theboat bottom should be kept as clean of marinegrowth as possible. If necessary, the boat bot-

tom can be coated with an anti-fouling paintapproved for your area to inhibit marinegrowth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.

1. Red cable2. Black cable3. Battery ZMU01943

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Trouble Recovery

68

EMU29424

TroubleshootingA problem in the fuel, compression, or ignitionsystems can cause poor starting, loss of pow-er, or other problems. This section describesbasic checks and possible remedies, and cov-ers all Yamaha outboard motors. Thereforesome items may not apply to your model.If your outboard motor requires repair, bring itto your Yamaha dealer.If the engine trouble warning 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 of rec-ommended 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 29.

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 replace withrecommended 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. Tighten allloose connections. Replace worn or brokenwires.

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

Q. Is engine stop switch lanyard not at-tached?A. Attach lanyard.

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 replace withrecommended type.

Q. Is fuel system obstructed?

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Trouble Recovery

69

A. Check for pinched or kinked fuel line or oth-er obstructions in fuel system.

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

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

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

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

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

Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tighten allloose connections. Replace worn or brokenwires.

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.

Warning 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 deteriorated?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.

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Trouble Recovery

70

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 outboardat 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 warning system activated?A. Find and correct cause of warning.

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 replace withrecommended type.

Q. Are weeds or other foreign matter tangledon gear housing?

A. Remove foreign matter and clean lowerunit.

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

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

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. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tighten allloose connections. Replace worn or brokenwires.

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.

Q. Is fuel joint connection incorrect?

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Trouble Recovery

71

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.EMU29432

Temporary action in emergencyEMU29440

Impact damage

WARNINGEWM00870

The outboard motor can be seriously dam-aged by a collision while operating ortrailering. 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. Inspect the control system and all compo-

nents for damage. Also inspect the boatfor damage.

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

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

EMU30680

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

WARNINGEWM00630

Be sure to use the specified fuse. An in-correct fuse or a piece of wire could allowexcessive current flow. This could causeelectric system damage and a fire hazard.

NOTE:Consult your Yamaha dealer if the new fuseimmediately blows again.

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Trouble Recovery

72

EMU29522

Power trim and tilt / power tilt will not operateIf the engine cannot be tilted up or down withthe power trim and tilt / the power tilt becauseof a discharged battery or a failure with thepower trim and tilt unit / the power tilt unit, theengine 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.

EMU29532

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.

WARNINGEWM01021

� 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 operate.Make sure the remote control lever is inneutral. Otherwise the boat could unex-pectedly start to move, which could re-sult in an accident.

� Attach the engine stop switch lanyard toa secure place on your clothing, or yourarm or leg while operating the boat.

� Do not attach the lanyard to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it from functioning.

� Avoid accidentally pulling the lanyardduring normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power, theboat 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 injure some-one.

� An unguarded, rotating flywheel is verydangerous. Keep loose clothing andother objects away when starting the en-gine. Use the emergency starter ropeonly as instructed. Do not touch the fly-wheel or other moving parts when the

1. Fuse box2. Fuse (10 A)3. Spare fuse (10 A)4. Fuse puller

1. Manual valve screw

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Trouble Recovery

73

engine is running. Do not install thestarter mechanism or top cowling afterthe engine is running.

� Do not touch the ignition coil, spark plugwire, spark plug cap, or other electricalcomponents when starting or operatingthe motor. You could get an electricalshock.

EMU29561

Emergency starting engine1. Remove the top cowling.2. Remove the start-in-gear protection ca-

ble from the starter, if equipped.

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

4. Prepare the engine for starting. For fur-ther information, see page 29. Be surethe engine is in neutral and that the en-gine stop switch lanyard lock plate is at-

tached to the engine stop switch. Themain switch must be “ ” (on), ifequipped.

5. If equipped the choke knob, pull out itwhen the engine is cold. After the enginestarts, gradually return the choke knob toits home position as the engine warmsup.

6. Insert the knotted end of the emergencystarter rope into the notch in the flywheelrotor and wind the rope several turnsaround the flywheel clockwise.

7. Give a strong pull straight out to crankand start the engine. Repeat if neces-sary.

1. Start-in-gear protection cable

OFF

ON

ZMU01880

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Trouble Recovery

74

EMU29670

Engine fails to operateEMU29691

Ignition system malfunctionIf the battery voltage is low or in the unlikelyevent of an ignition system malfunction, theengine speed may become erratic or the en-gine may stop. In such a situation, follow theprocedure below.1. Remove the CDI unit cover or electrical

cover, if equipped.2. Disconnect the yellow cord (emergency

circuit) of the CDI unit to return to port.

WARNINGEWM00350

When the yellow cord is disconnected, theidle and low speeds are slightly higherthan normal. Use care when starting off orstopping.

CAUTION:ECM00380

Follow this procedure only in an emergen-cy and just long enough to return to portfor repairs.

EMU29760

Treatment of submerged motorIf the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corrosion may begin almost immediate-ly.If you cannot immediately take the outboardmotor to a Yamaha dealer, follow the proce-dure below in order to minimize engine dam-age.EMU29783

Procedure1. Thoroughly wash away mud, salt, sea-

weed, and so on, with fresh water.2. Remove the spark plug(s), then face the

spark plug holes downward to allow anywater, mud, or contaminants to drain.

3. Drain the fuel from the carburetor, fuel fil-ter, and fuel line. Drain the engine oilcompletely.

4. Fill the sump with the fresh engine oil.

5. Feed engine fogging oil or engine oilthrough the carburetor(s) and spark plugholes while cranking the engine with themanual starter or emergency starterrope.

6. Take the outboard motor to a Yamahadealer as soon as possible.

1. Yellow cord

Engine oil capacity:0.8 L (0.85 US qt) (0.70 Imp.qt)

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Trouble Recovery

75

CAUTION:ECM00400

Do not attempt to run the outboard motoruntil it has been completely inspected.

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Consumer information

76

EMU29811

Important warranty information for U.S.A. and Canada

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Consumer information

77

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Consumer information

78

EMU29830

YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY

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Consumer information

79

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Consumer information

80

EMU29841

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA

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January 2006–0.3 × 1 CRPrinted in France

YAMAHA MOTOR CORPORATION, USA

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Warranty card 12/6/01 7:40 PM Page 1

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Warranty card 1

2/6/01 7:40 PM P

age 2