husqwm271_hwen1997_1018855-26

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101 88 55-26

Workshop Manual

Husqvarna Chain Saws

English1

Thisworkshopmanualappliestotheengineassemblyinthefollowingsaws:

MODELS 28

1XP/288XP

36/41

61/268/272XP

26

8K/272K

31

20XP

39

4XP

27

2S

51/55

40/45

42/242XP/246

254XP/257/262XP

2English

LISTOFCO

NTENTS

Introduction..........

...........................3

Safetyregulations

...........................5

TechnicalData.................................6

Tools......................

.........................14

Servicedata..........

.........................20

Troubleshooting...........................40

Safetyequipment..........................42

Starter.............................................57

Electricalsystem...........................61

Centrifugalclutch..........................67

Lubricationsystem

.......................70

Carburettor............

.........................83

Airfilter........................................101

Tankunit................

.......................103

Anti-vibrationsystem..................106

Pistoncylinder.............................108

Crankcaseandcrankshaft..........114

English3

INTROD

UCTION

Asproductioncontinues,changeswillbeintro-

ducedsuccessivelytothechainsaw.Ifatany

timethesechangesinfluenceserviceand/or

spares,specialserviceannouncementswillbe

sentout,whichmeansthatthismanualwillcease

tobecurrentwithtime.Inordertoavoidprob-

lems,themanualshouldalwaysbereadtogether

withallserviceannouncementsthatapplytothe

specificmodelofchainsaw.

Layout

Thedescriptivesectionsinthisworkshopmanual

aresetoutinanumberofflowdiagrams.When

carryingoutrepairsonaspecificchainsaw,

followthesignsthatapplytothesawinquestion.

Diagramsarenotnumberedastheyarelinkedto

theactualtext,eitherbylinesorbybeinginthe

samebox.

Positionaldirectivestocomponentsinsidethe

diagramsaredesignatedwithA,B,etc.andstart

fromAagainineachnewsection.

General

Updates

AlwaysuseHusqvarnaoriginal:

Spareparts

Servicetools

Accessories

Forspecificproceduresspecialtoolsarere-

quired.Inthisworkshopmanual,alltheservice

toolsrequiredarelisted.Useofthetoolsis

describedinappropriatesections.

Tools

Thisworkshopmanualprovidesadetailedde-

scriptionofproceduresfortroubleshooting,repair

andtestingofthechainsaws.Safetyprecautions

thatshouldbetakenduringrepairarealso

described.

Thisworkshopmanualappliestotheengine

assemblyinthefollowingchainsaws:

3640

4142

45515561

242XP

246254XP

257262XP

268

272XP

268K

272K

272S

281XP

288XP

394XP

3120XP

Safety

Note!

Thesectiondealingwithsafetyshouldbe

readandunderstoodbyallwhocarryout

repairorserviceworkonthechainsaw.

Targetgroup

Therearewarningsymbolsonthechainsaw.Ifa

warningsymbolhasbeendamagedorismissing,

itmustbereplacedimmediatelyinorderto

maximisesafetywhenthesawisinuse.

Thisworkshopmanualiswrittenforpersonnel

thatareassumedtohavegeneralknowledgeof

serviceandrepairofsmallengines.

Theworkshopmanualshouldbereadandunder-

stoodbyallpersonnelcarryingoutserviceand

repairworkonthechainsaw.Themanualisalso

suitableforuseinthetrainingofnewemployees.

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4English

INTRODUCTION

Disma

ntlingandreassemblyoftheentire

chainsaw

When

theentirechainsawistobedismantled

andreassembled,proceedasfollows:

1.Refertopage57,whichdealswiththe

St

arterandcarryouttheinstructions

un

dertheheadingDismantling.

2.W

orkforwardsthroughthemanualand

ca

rryoutDismantlinginstructionsinthe

or

derthatthesectionsoccur.

3.ReturntotheStarteronpage58and

followtheinstructionsunderCleaning

an

dInspection.

4.W

orkforwardthroughthemanualand

ca

rryoutCleaningandInspectioninthe

or

derthatthesectionsoccur.

5.Orderorcollectalltherequiredspare

pa

rtsfromthesparepartsstores.

6.In

ordertoAssemblethechainsaw,

pr

oceedasfollows:

Refertopages117-120whichdealswith

theCrankcaseandcarryouttheinstruc-

tio

nsunderAssembly.

Refertopages111-112whichdealswith

thePistonandCylinderandcarryout

theinstructionsunderAssembly.

Refertopages107whichdealswiththe

Anti-vibrationsystemandcarryoutthe

instructionsunderAssembly.

Refertopage105whichdealswiththe

Ta

nkunitandcarryouttheinstructions

un

derAssembly.

Contin

uetoworkbackwardsthroughthe

manua

landcarryoutAssemblyinstructions

asthe

sectionsoccur.

Inorde

rtoimproveunderstanding,some

sectionsbeginwithaDescriptionofthe

relevantsub-assembly.

Use

Thisworkshopmanualcanbeusedintwodifferent

ways:

Repairofaspecificsub-assembly

Dismantlingandreassemblyoftheentirechain

saw

Repairofaspecificsub-assembly

Whenaspecificsub-assemblyonthechainsawis

toberepaired,proceedasfollows:

1.

Refertothepagereferringtotherelevantsub-

assembly.

2.

Carryoutthesteps:Dismantling

Cleaningandinspection

Reassembly

English5

SAFETYREGUL

ATIONS

GeneralInstructions

Sp

ecialinstructions

WARNING!

Thewarningtextindicatesarisk

ofpersonalinjuryifinstructions

arenotfollowed.

NOTE!

Thewarningtextindicatesariskof

damagetoequipmentifinstructions

arenotfollowed.

Thechainsawistypeapprovedwith

regardtosafetyaccordingtoapplicable

legalrequirementswhenfittedwiththe

cuttingequipmentspecifiedinthe

Operator'sManual.Equippingthesawwith

otherequipmentoraccessoriesandspare

partsnotapprovedbyHusqvarnacan

resultinnoncompliancewiththesesafety

requirementsandliabilityforpersons

carryingoutsuchmodifications.

Thefuelusedinthechainsawposesthe

followinghazards:

1.Thefluidanditsfumesarepoisonous.

2.Cancauseeyeandskinirritation.

3.Cancausebreathingdifficulties

4.Ishighlyinflammable.

Thebar,chainandclutchcover(chain

brake)mustbeassembledbeforethe

chainsawisstarted,otherwisetheclutch

maycomeloosecausingpersonalinjury.

Wearearmuffswhentestingthechain

saw.

Donotusethesawuntilithasbeen

adjustedsothatthechaindoesnotrotate

whenidling.

Bearinmindthefirerisk.Thesaw

can

producesparksthatcancauseafirehazard..

Aftertesting,donottouchthe

silenceruntilithascooled.Risk

ofburns.Thisespeciallyappliesif

thesaw

isfittedwithacatalyticconverter.

Thecoatingonandinthecatalyticelement

ishazardoustotouch.Useprotectivegloves

whenworkingonthecatalyticconverter.

Inadequatechainlubricationcanresultin

thechainbreaking,whichcancause

seriousorfatalinjury.

Makesurethatthestarterrecoil

springdoesnotflyoutandcause

personalinjury.Releasethespring

tensionbeforethecordpulleyisremoved.

Whenremovingthepressure

springforthechainbrake,ensure

thatthebrakeisinthe'on'

positionwhichreducesthespring

tension,otherwisethespringcanflyout

causingpersonalinjury.

Afterrepair,thechainbrakemustbe

checkedinaccordancewiththe

instructionsonpage47.

Whenreplacingthecrankshaftbearings

notethatthecrankcasehalvesarehot.

Useprotectivegloves.

Whenusingcompressedair,theairjet

shouldneverbepointedtowardsthebody.

Aircanbeforcedintothebloodstream,

whichcancausefatality.

Workshopswherechainsawsareserviced

mustbeequippedwithsafetyequipment

assetoutinlocaldirectives.

Nooneshouldrepairachainsawwithout

firsthavingreadandunderstoodthe

contentsofthisworkshopmanual.

Thefollowingwarningtextsaretobefound

inthismanualincertainplaces.The

warningtextsoccurbeforetheprocedure

towhichtheyrefer.

1

!

6English

Displacement

Bore

Stroke

Max.powerat

Sparkpluggap

Ignitionsystem

Airgap

Carburettor

cm3

mm

mm

r/min

mm/inches

mm/inches

TECHNICA

LDATA

36

36

38.0

32.0

9000

40

40

40.0

32.0

9000

41

40

40.0

32.0

9000

42

42

42.0

30.0

9300

45

44

42.0

32.0

9000

51

51

45.0

32.0

9000

36

0.5/.02

PHELON

0.3/.012

WALBROWT239

40

0.5/.02

PHELON

0.3/.012

ZAMAC1Q-EL1

41

0.5/.02

PHELON

0.3/.012

WALBROWT239

42

0.5/.02

SEMAM7

0.3/.012

WALBROHDA98

45

0.5/.02

PHELON

0.3/.012

ZAMAC1Q-EL1

51

0.5/.02

ELECTROLUXET

0.3/.012

WALBROWT170

36

33-46/13-18

17.3/9000rpm

.325-3/8

1.3/.050

40

33-46/13-18

17.4/8500rpm

.325

1.3/.050

41

33-46/13-18

17.3/9000rpm

.325-3/8

1.3/.050

42

28-46/11-18

17.9/9300rpm

.325

1.5/.058/1.3/.0501)

45

33-46/13-18

17.4/8500rpm

.325

1.3/.050

51

33-51/13-20

17.4/9000rpm

.325-3/8

1.5/.058/1.3/.0501)

1) FromMay1996

Barlength

Chainspeed

Chainpitch

Drivelinkgauge

cm/inches

m/s

inches

mm/inches E

nglish7

Fueltankvolume

Oilpum

pcapacity

Oiltankvolume

Automaticoilpump

Litres

cm3/minat8.500rpm

Litres

r/min

r/min

r/min

Champion

TECHNIC

ALDATA

36

3000

450

0

13000

RCJ7Y

40

2500

360

0

12500

RCJ7Y

41

3000

450

0

13000

RCJ7Y

42

2700

380

0

14500

RCJ7Y

45

2500

360

0

12500

RCJ7Y

51

2500

370

0

12500

RCJ7Y

36

0.4

7

0.2

Yes

40

0.5

8

0.25

Yes

41

0.4

7

0.2

Yes

42

0.5

3-7

0.27

Yes

45

0.5

8

0.25

Yes

51

0.6

10

0.3

Yes

36

4.6

5.3

(13")

No

40

4.7

5.4

(13")

No

41

4.6

5.3

(13")

No

42

4.7

5.5

(13")

No

45

4.7

5.4

(13")

No

51

5.2

6.2

(15")

No

Weightwithoutbarandchain

Weightwithbarandchain

Handleheater

kg

kg/lbs

Watt/r/min

Idlingspeed

Engagem

entspeed

Max.speed

Sparkplug

8/3/2019 husqwm271_hwen1997_1018855-26

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8English

Displacement

Bore

Stroke

Max.powerat

Barlength

Chainspeed

Chainpitch

Drivelinkgauge

Sparkpluggap

Ignitionsystem

Airgap

Carburettor

cm3

mm

mm

r/min

mm/inches

mm/inches

cm/inches

m/s

inches

mm/inches

TECHNICALDATA

55

53

46.0

32.0

9000

61

62

48.0

34.0

8300

242XP

42

42.0

30.0

9900

246

46

44.0

30.0

9000

254XP

54

45.0

34.0

9300

257

57

46.0

34.0

9000

55

0.5/.02

ELECTROLUXET

0.3/.012

WALBROWT170

61

0.5/.02

ELECTROLUXET

0.3/.012

TILLOTSONHS254

242XP

0.5/.02

SEMAM7

0.3/.012

WALBROHDA98

246

0.5/.02

SEMAM7

0.3/.012

WALBROHDA98

254XP

0.5/.02

ELECTROLUXET

0.3/.012

WALBROHDA35B

257

0.5/.02

ELECTROLUXET

0.3/.012

WALBROHDA120

55

38-51/15-20

17.4/9000rpm

.325-3/8

1.5/.058/1.3/.0501)

61

38-51/15-20

18.4/8300rpm

3/8

1.5/.058

242XP

28-46/11-18

19.1/9900rpm

.325

1.5/.058/1.3/.0501)

246

28-46/11-18

17.3/9000rpm

.325

1.5/.058/1.3/.0501)

254XP

33-51/13-20

17.3/9300rpm

.325-3/8

1.5/.058

257

33-51/13-20

17.3/9000rpm

.325-3/8

1.5/.058

1) FromMay1996

English9

Idlingspeed

Engagementspeed

Max.speed

Sparkplug

Fueltankvolume

Oilpumpcapacity

Oiltankvolume

Automaticoilpump


Weightwithb

arandchain

Handleheater

Litres

cm3/minat8.500rpm

Litres

r/min

r/min

r/min

Champion

kg

kg/lbs

Watt/r/min

TECHNICALDATA

55

2500

3700

12500

RCJ7Y

61

2500

3700

12000

RCJ7Y

242XP

2700

3900

15500

RCJ7Y

246

2700

3900

15000

RCJ7Y

254XP

2700

3700

13800

RCJ7Y

257

2700

3700

13500

RCJ7Y

55

0.6

10

0.3

Yes

61

0.75

4/8/12/17

0.45

Yes

242XP

0.5

3-7

0.27

Yes

246

0.5

3-7

0.27

Yes

254XP

0.6

3-10

0.3

Yes

257

0.6

3-10

0.3

Yes

55

5.2

6.2(15")

No

61

6.1

7.1(15")

No

242XP

4.7

5.5(13")

65/10.000

246

4.7

5.5(13")

No

254XP

5.4

6.3(13")

65/10000

257

5.6

6.6(13")

65/10000

10English

Displacemennt

Bore

Stroke

Max.powerat

Barlength

Chainspeed

Chainpitch

Drivelinkgauge

Sparkpluggap

Ignitionsystem

Airgap

Carburettor

cm3

mm

mm

r/min

mm/inches

mm/inches

cm/inches

m/s

inches

mm/inches

TECHNICA

LDATA

262XP

62

48.0

34.0

9600

268

67

50.0

34.0

9000

272XP

72

52.0

34.0

9300

268K

67

50.0

34.0

9000

272K

72

52.0

34.0

9300

272S

72

52.0

34.0

9300

262XP

0.5/.02

ELECTROLUXET

0.3/.012

WALBROHDA120

268

0.5/.02

ELECTROLUXET

0.3/.012

TILLOTSONHS260

272XP

0.5/.02

ELECTROLUXET

0.3/.012

TILLOTSONHS260

268K

0.5/.02

ELECTROLUXET

0.3/.012

TILLOTSONHS255

272K

0.5/.02

ELECTROLUXET

0.3/.012

TILLOTSONHS255

272S

0.5/.02

ELECTROLUXET

0.3/.012

TILLOTSONHS255

262XP

33-51/13-20

18.5/9600rpm

.325-3/8

1.5/.058

268

38-51/15-20

18.4/9000rpm

3/8

1.5/.058

272XP

38-51/15-20

20.0/9300rpm

3/8

1.5/.058

268K

-

-

-

-

272K

-

-

-

-

272S

-

-

-

-

English11

Idlingspeed

Engagement

speed

Max.speed

Sparkplug

Fueltankvolume

Oilpumpc

apacity

Oiltankvolume

Automaticoilpump

Weightwithoutchainandbar

Weig

htwithchainandbar

Handleheater

Litres

cm3/minat8

.500rpm

Litres

r/min

r/min

r/min

Champion

kg

kg

/lbs

Watt/r/min

TECHNIC

ALDATA

262XP

2700

340

0

13500

RCJ7Y

268

2500

350

0

12500

RCJ7Y

272XP

2500

350

0

13500

RCJ7Y

268K

2500

350

0

10000

RCJ7Y

272K

2500

350

0

10000

RCJ7Y

272S

2500

350

0

10000

RCJ7Y

262XP

0.6

6.5-13.5

0.3

Yes

268

0.75

4/9/13/17

0.45

Yes

272XP

0.75

5/9/14/19

0.45

Yes

268K

0.75

-

-

-

272K

0.75

-

-

-

272S

0.75

-

-

-

262XP

5.8

6.8

(13")

65/10000

268

6.2

7.2

(15")

65/10000

272XP

6.3

7.3

(15")

65/10000

268K

9.5

-

-

272K

9.6

-

-

272S

21.0(includingcarriage)

-

-

8/3/2019 husqwm271_hwen1997_1018855-26

4/32

12English

Displacement

Bore

Stroke

Max.powerat

Barlength

Chainspeed

Chainpitch

Drivelinkgauge

Sparkpluggap

Ignitionsystem

Airgap

Carburettor

cm3

mm

mm

r/min

mm/inches

mm/inches

cm/inches

m/s

inches

mm/inches

TECHNICALDATA

281XP

81

52.0

38.0

9000

288XP

87

54.0

38.0

9300

394XP

94

56.0

38.0

8800

3120XP

119

60.0

42.0

9000

281XP

0.5/.02

SEMAM7

0.3/.012

TILLOTSONHS228

288XP

0.5/.02

SEMAM7

0.3/.012

TILLOTSONHS228

394XP

0.5/.02

SEMAM44

0.3/.012

WALBROWJ39

3120XP

0.5/.02

SEMAM37

0.3/.012

WALBROWG6

281XP

38-71/15-28

20.0/9000rpm

3/8

1.5/.058

288XP

38-71/15-28

20.7/9300rpm

3/8

1.5/.058

394XP

46-91/18-36

19.6/8800rpm

3/8-.404

1.5/.058-1.6/.063

3120XP

60-107/24-42

20.1/9000rpm

.404

1.6/.063 En

glish13

Idlingspeed

Engagementspee

d

Max.speed

Sparkplug

Fueltankvolume

Oilpumpcapac

ity

Oiltankvolume

Automaticoilpump


Weightwithbarchain

Handleheater

Litres

cm3/minat8.500rpm

Litres

r/min

r/min

r/min

Champion

kg

kg/lbs

Watt/r/min

TECHNICAL

DATA

281XP

2500

3200

12500

RCJ6Y

288XP

2500

3200

12500

RCJ6Y

394XP

2500

3400

12500

RCJ6Y

3120XP

2500

3300

11500-12500

RCJ7Y

281XP

0.9

9/12/15/18

0.5

Yes

288XP

0.9

9/12/15/18

0.5

Yes

394XP

0.9

14-21

0.5

Yes

3120XP

1.25

8-51

0.7

Yes

281XP

7.5

8.7(18")

56/7200

288XP

7.5

8.7(18")

56/7200

394XP

7.9

9.2(18")

65/10000

3120XP

10.4

12.3(28")

No

14English

5025057-013/16"

5025016-016mm

5025064-015mm

5025018-014mm

5025019-013mm

5025022-018mm

5025023-0110mm

5027113-01

5025134-02(0,3mm)

5025083-01

5025102-01

5027114-01

compl5025070-01

5025037-01

5027009-01

502

5088-015mm

502

5087-014mm

502

5086-013mm

502

5006-01

5049826-01

(36,41,40,45)

Toolsforallchainsaws

TOOLS

5025191-01(0,5mm)

English15

4mm

8mm

5025033-01

3mm;4mm;5mm

8mm;10mm

5052679-12

40>9101116

45>9251168

50>9250856

5025194-01

5049090-01

5025161-01

(51,55)

5025030-09

5025079-01(55)

40>9101116

45>9251168

5049029-02

5025403-01

(40,45,55)

5025046-01

(55)

compl5025038-01

5025033-01

5025194-01

5300311-36

5300311-12

5025100-02

Toolsforsaws36and41

Toolsforsaws40,45,51and55

TOOLS

5025099-01

(55)

5025026-01

(55)

5053818-17

(40.45)

8/3/2019 husqwm271_hwen1997_1018855-26

5/32

16English

3mm;4mm

8mm

5025033-01

compl5025031-01

5027003-01

5025161-01

5049090-01

5025082-01

5025030-07

5025132-01

5025150-01

5025100-02

5025072-01

5025071-01

5025045-01

5025046-01

compl5025038-01

*com

pl50251

49-02

3m

m;4mm

8m

m

5025033-01

5025072-01

502507

1-01

5025045-01

5025046-01

compl5025038-01

5049090-01

5025161-01

5025079-01

5025030-10

Toolsforsaws42,242and246


TOOLS

*compl5025149-02 5

025149-01*

*5025154-01

5025026-01*

5025099-01

5025149-01*

*5025154-01

5025099-01

5025026-01*

English17

3mm;4mm;3/16"

8mm

5027136-01(4mm)

5025033-01

compl5025031-01

5027003-01

5025161-01

5049090-01

5025047-01

5025048-01

5025045-01

5025046-01

compl5025038-01

5025020-01

3mm;4mm;3/16"

8mm

5027136-01(4mm)

5025033-01

5025082-01

5025066-02

502

5047-01

5025081-01

compl5025038-01

5025161-01

5049090-01

5025053-01

5025052-01

5025030-04

5025030-08

5025169-01

(268)

5025066-02

5025067-01

5025100-02

5025046-01

TOOLS


Toolsforsaws281and288

5025026-01*

5025149-01*

*5025154-01

5025026-01*

5025149-01*

*5025154-01

*compl5025149-02

*com

pl5025149-02

18English

3mm;4mm;5mm;3/16"

8mm;10mm

5025033-01

5025082-01

5025066-02

5025201-01(394)

5027138-01(3120)

compl5025038-01

5049090-0

1

5025052-01

5025030-08

5025204-01

(394)

5027140-01

(3120)

5027139-01(394)

TOO

LS

Toolsforsaws394and3120

*compl5025149-02

5025149-01*

*5025154-01

5025026-01*

English19

Ordernumber

Designation

5025006-01

Pliers

5025016-01

Allenkey

5025018-01

Allenkey

5025019-01

Allenkey

5025020-01

Assemblytool

5025022-01

Socket

5025023-01

Socket

5025026-01

Puller

5025030-04

Assemblytool

5025030-08

Assemblytool

5025030-09

Assemblytool

5025030-10

Assemblytool

5025031-01

Puller

5025033-01

Pistonstop

5025037-01

Vacuumgauge

5025038-01

Pressuregauge

5025045-01

Extendedsocket

5025046-01

Extendedsocket

5025047-01

Coverplate

5025048-01

Coverplate

5025052-01

Assemblysocket

5025057-01

Allenkey

5025064-01

Allenkey

5025066-02

U-key

5025067-01

U-key

5025070-01

Assemblytool,piston

5025071-01

Coverplate

5025072-01

Coverplate

5025079-01

Assemblymandrel

5025081-01

Coverplate

5025082-01

Assemblymandrel

5025083-01

Hook,tankvalve

5025086-01

Allenkey

5025087-01

Allenkey

5025088-01

Allenkey

5025099-01

Pullersleeve

5025100-02

U-key

5025102-01

Assemblyfixture

5025132-01

Assemblysleeve

5025134-02

Feelergauge

5025149-01

Puller

5025149-02

Puller

5025150-01

Socket

5025154-01

Boltset

5025161-01

Dismantlingtool,crankcase

5025169-01

Assemblymandrel

5025169-01

Feelergauges

5025194-01

Assemblymandrel

5025201-01

Coverplate

5025204-01

Spacer

5025403-01

Spacer

5027009-01

Pumpblower

5027113-01

Testsparkplug

5027114-01

Tachometer

5027136-01

Allenkey

5027138-01

Coverplate

5027139-01

Coverplate

5027140-01

Spacer

5049029-02

Coverplate

5049090-01

Puller

5049826-01

Siliconerubber

5052679-12

Assemblymandrel

5053818-17

Puller

Listoftools

TOOLS Or

dernumber

Designation

8/3/2019 husqwm271_hwen1997_1018855-26

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20English

Saws36and

41

SERVICEDATA

L

L

I

G

G

G

G

5

10

15

4

6

Characterkey

Numbersbycomponentsthatarebolted

refertothetighteningtorqueinNm.

L

=Lubricateusingtwo-strokeoil.

I

=Lubricateusingsawchainoil.

G

=Lubricateusinggrease.

=Lockingfluid(Loctite).

English21

SERVICED

ATA

L

G

15

4

6

4

3

28

4

22English

Saws42,242and246

SERVICE

DATA

L

L

I

G

G

G

G

515

4

8

3

G

242

42246

10

5

42246

242

7-8

8-10

4-5

Characterkey



L


I


G



English23

SERVIC

EDATA

L

G

L

20

4

2

4

28

2

9

32

9

6

2

2

13

8/3/2019 husqwm271_hwen1997_1018855-26

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24English

Saws40and

45

SERVICEDATA

L

L

I

G

G

G

G

3-4

2-3

25-35

7-8

2-3

2-3

2-3

10-12

Characterkey



L


I


G



English25

SERVICED

ATA

L

G

3-4

2-3

2-3

25-30

2-3

2-32

-3

2-3

8-10

2-3

2-3

3-4

20

2-3

26English

Saws51

and55

SERVICE

DATA

L

L

I

GG

G

G

G

4-5 1

5

6-8

7-8

30-40

3-4

3-4

8-10

3-4

1,5-2

Characterkey



L


I


G



English27

SERVIC

EDATA

L

G

15

25

12-14

8-10

3-4

3-4

3-4

3-5

3-4

3-4

1-2

8/3/2019 husqwm271_hwen1997_1018855-26

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28English

Saws254and

257

254

257

SERVICEDATA

L

L

I

G

G

G

G

G

5

8

15

45

10

10

5

35

3

5

3

Characterkey



L


I


G



English29

254

SERVICED

ATA

L

G

5

3

2

28

4

10

20

4

13

4

9

3

5

30English

Saw262

SERVICE

DATA

L

L

I

G

G

G

G

G

5

8

15

46

10

35

4

4

3

4

Characterkey



L


I


G



English31

SERVIC

EDATA

L

G

2

2

28

4

9

20

4

5

13

4

4

5

3

95

8/3/2019 husqwm271_hwen1997_1018855-26

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32English

Saws61,268and272

268272

61

SERVICEDATA

L

L

I

G G

G

G

G

5

8

15

610

5

10

2

35

6

6

35

1

4

3

Characterkey

Numbersbycomponentsthatare

boltedrefertothetighteningtorqueinNm.

L


I


G



English33

272

268272

61

SERVICED

ATA

L

G

3

428

4

10

15

4

3

3

5

14

6

4

6

11

3

1

3

9

3

34English

Saws281

and288

SERVICE

DATA

L

I

G

G

G

G

G

5

8

15

6

13

5

4

35

6

L

Characterkey



L


I


G



English35

SERVICEDATA

L

G6

4

35

11

20

7

7

3

17

3

4

77

6

4

3

19

8/3/2019 husqwm271_hwen1997_1018855-26

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36English

Saw394

L

I

GG

G

G

G

5 15

2-4

10-12

6-8

7-9

SERVICEDATA

L

Characterkey

Numbersbycomponentsthatare

boltedrefertothetighteningtorque

inNm.


L


I


G


English37

SERVICED

ATA

G

L

30-40

10-12

5-6

6

2-3

4-5

3-5

3-5

5-6

20-22,5

12-14

L

38English

Saw3120

SERVICE

DATA

L

I

G

G

G

G

L

G

5

8

15

5

12

5

38

7

8

5

7

5

1

3

4

Characterkey



L


I


G



English39

SERVIC

EDATA

L

G

L

5

4

40

12

20

4

12

17

10

8

9

4

6

5

57

3

3

8/3/2019 husqwm271_hwen1997_1018855-26

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40English

Wornneedlevalve/needle

Leakingcontroldiaphragm/

coverplate

Controlsystemsticking

Wornthrottlelever

Faultydiffuserjet

Fuelfilterblocked

Fuellineblocked

Leakingmanifold

Loosecarburettormounting

Wornthrottlevalveshaft

Loosethrottlevalvescrew

Wornthrottlevalve


Leakinthrottlesystem(airor

fuel)

Controldiaphragmcentreknob

isworn

Holeindiaphragm


coverplate

Crankcaseleaking

Fuellineblocked

Controlsystemsettoohigh


Controlsystem(airorfuel)


coverplate

Faultydiffuserjet

Crankcaseleaking



Controlsystemdamaged

Wornneedlevalve


coverplate

Controlsystemincorrectly

assembled

AdjustL-screw

Airfilterblocked

Chokenotworkingcorrectly

Wornchokeshaft

Wornchokeplate

Fuelfilterblocked

Fuellineblocked

Pistonringseized

Blockedimpulsechannel

Looseorfaultyfuelpipe

Holeindiaphragm




Leakincontrolsystem(airor

fuel)

Loosecoveroncarburettor

pumpside

Wornneedlevalve



Difficultstarting

Carburettor

leakingfuel

Floodingwhen

theengineisnot

running

Faultsthatcandeveloponthechainsaware

dividedintofourgroupsasfollows.Ineachcat-

egory,possiblemalfunctionsareshownontheleft,

withalistofpossiblefaultsontheright.Themost

probablefaultisgivenfirstandsoon.

Idling(lowrpm)

Willnotidle

Idlingtoorich

AdjustL-screw

Leakingmanifold(intermediate)


Looseorfaultyfuelpipe

Fuelfilterblocked

Fuellineblocked

Fueltankbreatherblocked

Throttleshaftandleverstiff

Throttlecablesticking

Defectivethrottlereturnspring

Bentthrottlelevershaftstop

Faultydiffuserjet

AdjustL-screw



Wornthrottlelever


coverplate


Idlesw

henL-screw

closed

Idlinguneven

L-screwrequires

consta

ntadjustment

Toomuchfuelatidling

Troubleshootingschematic

TROUBLESHOO

TING

Starting

Idling

(lowrpm)(cont.)

English41

AdjustH-screw

Blockedairfilter

Blockedfueltankbreather

Blockedfuelfilter

Fuellineblocked

Looseordamagedfuelline

Impulsechannelleaking

Impulsechannelblocked


pumpside

Faultypumpdiaphragm

Leakingmanifold


Controlsystemsettoolow

Controlsystemdamaged


assembled

Leakingcontroldiaphragm/cover

Controlsystems

ticking

Blockedsilencer

AdjustH-screw


Blockedfuelfilter




pumpside

Faultypumpdiaphragm

Blockedairfilter

Controlsystems

ticking


fuel)


assembled

Loosediaphragm

Holeindiaphragm



Blockedfuelfilter

Fuellineblocked





pumpside

Faultypumpdiaphragm

Leakingmanifold


bolts

Controlsystemsettoolow


fuel)


assembled

Loosediaphragm

Holeindiaphragm


Willnotrunatfull

throttle

Lowpower

Willnot

four-stroke

Highrpm

Accelerationandretardation

Do

esnotaccelerate

Mo

torstallswhen

throttlereleased

Ov

errichaccelera-

tion

AdjustL-screw

AdjustH-screw

Blockedairfilter


Blockedfuelfilter

Fuellineblocked




pumpside

Faultypumpdiaphragm

Leakingmanifold


Throttlesettoolow


assembled


Faultydiffuserjet

Blockedsilencer

AdjustL-screw

AdjustH-screw

Faultypumpdiaphragm



Faultydiffuserjet

AdjustL-screw

AdjustH-screw

Blockedairfilter

Faultypumpdiaphragm

Faultydiffuserjet

Troubleshootingmethods

In

additiontofaultsgivenintheaboveschematic,

tro

ubleshootingcanbecarriedoutonaspecific

co

mponentorsub-systemofthechainsaw.The

differenttestingproceduresaredescribedin

respectivesectionsandareasfollows:

1.

Pressuretestingthecarburettor.

Seepage100.

2.

Pressuretestingthecrankcaseandcylinder.

Seepage114.

3.

Pressuretestingthedecompressionvalve.

Seepage114.

4.

Checkingtheoperationofthechainbrake.

Seepage47.

TROUBLESHO

OTING

42English

Chainbrake

3120continuesonnextpage.

Placetheclutchcoverinavicewiththejaws

positionedasshownbelowandreleasethe

tubularpinB.

CarefullyknockoutthetubularpinB.

Allsawsexcept3120

3

120

!WARNING!

Iftheclutchcoverslidesoutof

thevice'sgripthespringcanfly

outwithimmenseforceresulting

inpersonalinjury!

Wearprotectiveglasses!

Dismantling

Loosenthescrewonthehandguardand

screwback2turns.

Gentlyhitthescrewsothatthethreadedpart

ofthebushingcanberemoved.

Dismantletheotherpartofthebushingby

meansofapunch.

RemovethecylindricalpinA.

Slidethehandguardforwardssothatthe

brakeisactuated.

Dismantletheclutchcoverandclean.See

theoperatinginstructions.

Removethecoveronthechainbrakespring.

Thecoverhas4or5screws.

Continuesonnextpage.

SAFETYEQ

UIPMENT

B

A

!WARNING!

Ifthebrakeisnot'on',thespring

canflyoutresultinginpersonal

injury.


English43

3120

Slideupthebackedgeofthe

springwithascrewdriver.

Useapunchtoknockoutthepinholdingthe

kneelink.

Carefullyunscrewthevicesothatthepres-

surerodandtheratchetmoveoutofthe

clutchcover.

Dismantlethepressurerodfromthebrake

band.

Allsawsexcept3120

Removethescrewthatholdsthefixedendof

theband.

40,42,45,51,

242,246,55,254,

257,262and394

36,41,61,268,

272,281and288

Knockouttheband'sfixedendusinga

punchthroughtheholeintheclutchcover

andremovethelooseparts.

Liftuptheband'sfixedendusingascrew-

driverandremovethelooseparts.

SAFETYE

QUIPMENT

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44English

CleaningandInspection

Cleanandinspectallparts.

Thethicknessofthebrakebandmustnotbe

under0.8mmatanypoint.

Assembly

Fittheband'sfixedendintopositiononthe

clutchcover.

Allsawsexcept3120

3120



Fitthescrewthatholdstheband'sfixedend.

Greasethekneelinkandknockinthetubular

pinthatholdsthekneelink.

SAFETYEQUIPMENT

Min.0.8mm

English45

Allsawsexcept3120

3120

Slidethespringoverthekneelink'sstudand

pressdowntheoppositeendofthespringinto

itsrecess.

Fitthecoveroverthespring.

Fitthespringandscrewontothepressure

rodonthebrakeband.

Note!Plasticsleeve.

Bottom

thescrew

ontothepressurerod

threadandbackoff4-5turns.

Greaseandfittheratchet.Settheunitina

vice,positionedinthejawsasshownbelow.

!WARNING!

Iftheclutchcoverslidesoutof

thevice'sgripthespringcanfly

outwithimmenseforceresulting

inpersonalinjury!



SAFETYEQUIPMENT

46English

Allsawsexcept3120

Carefullytightentheviceuntiltheholeforthe

tubularpinandtheratchetalign.

Carefullyknockinthepin.

Fitthehandguard,thetwobushingsandthe

screw.

Fitthecylindricalpin.

Pullbackthehandguardsothatthebrakeis

notactuated.

SAFETYEQ

UIPMENT

Checkthechainbrakeasdescribedonthe

nextpage.

3120

English47

Barlength,L

Height,H

15-20inches

50cm

21-28inches

70cm

29-32inches

80cm

L

H

Theengineshouldnotberunning

duringthetest.

Testthatthechainbrakecomesonas

follows:

!WARNING!

Afterrepair,thechainbrake

mustbecheckedassetoutin

thefollowinginstructions.

Checkingbrakeoperation

Holdthechainsawaboveafirmsurface.

Thedistancebetweenthebarandthe

surfaceareshowninthetablebelow.

SAFETYEQUIPMENT

Releasethefronthandleandletthechain

sawrotatearoundtherearhandle.

Whenthebarnosehitsthesurfacethe

chainbrakeshouldtrip.

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48English

Chaincatcher

Description

Thechaincatcherisintentedtocatchthe

chainifitshouldbreak.

Thechaincatcherhasadifferentdesignand

issecureddifferentlyonthechainsaws

describedinthismanual.

Thefollowingdesignsareused:

Aluminiumangle.

Plasticangle.

Fixedroller.

Rotatingroller.

Thefollowingsecuringmethodsareused:

Usingscrewsonthecrankcase.

Usingscrewsonthespike.

Usingnutsonthespike.

Replacing

Dismantlethechainandbar.Seetheoper-

atinginstructions

Reassemblethechainandbar.Seethe

operatinginstructions

Checkthechaincatcherandreplaceifbro-

kenorbadlydamaged.

Thetighteningtorqueisstatedintheservice

data

SAFETYEQUIPMENT

English49

Muffler W

ARNING!

Donottouchthemuffleruntilit

hascooled.Riskofburns!

Dismantling

!

SAFETYEQUIPMENT

BC A

Ifthesawisequippedwithmufflermounting

(A),unscrewthisfrom

thecrankcaseand

muffler.

Unscrewthemufflerfromthecylinder

(M5orM6bolts,M5orM6nuts).

Removethemuffler,gasketandcoolingplate

(B)ifthesawissoequipped.

Ifthesawisequippedwithasparkarrester

(C),removethis.

Saws36and41

Saw242Cat

Dismantlethemuffler

asshowninthefigure

totheright.

Dismantlethemufflerasshown

inthefiguretotheright.

!

A

1

WARNING!

Thecoatingonandinthecatalytic

converterelement(A)ishazardous

toyourhealthiftouched.Wear

protectivegloveswhenworkingon

acatalyticconverter

50English

SAFETYEQ

UIPMENT


Cleanallpartsandcheckthefollowing:

Thatthemufflerandmufflermountingsare

notcrackedorotherwisedamaged.

ThatthegasketsareOK.

Assembly

Cleanallcontactsurfaces.

Othersaws

Ifthesawisequippedwithasparkarrester

(C),fitthis.

Saws36and

41

Fitthecoolingplate(B)if

fitted,gasketandmuffleron

thecylinder.

Othersaws

242Cat

Assemblethemufflerandfittothe

cylinder.Tighteningtorque,seepage

20.

! D E F

B C A

Se

e"Servicedata"regardingtighteningtorques.

1.

Securethemuffleronthecylinderusingthetwo

bolts(D).

2.

Assemblethemufflercomponentsusingthefour

bolts(E).

3.

Securethemufflertothecrankcaseusingthetwo

bolts(F)andLoctite.

Onlyspeciallytreatedboltsmaybeusedon

thecatalyticconverter(hightemperature).

Seesparepartscatalogue.

1

Tightenallboltsusingthetightening

torquesetoutinthe"Servicedata".

WARNING!

Thecoatingonandinthecatalytic

converterelement(A)ishazardous

toyourhealthiftouched.Wear

protectivegloveswhenworkingon

acatalyticconverter

WARNING!

Thecoatingonandinthecata-

lyticconverterelement(A)is

hazardoustoyourhealthif

touched.Wearprotectivegloves

whenworkingonacatalytic

converter

!

English51

Stopswitch

Dismantling

Removetheearthscrew(A)andcable(B).

Presstheswitch'ssecuringtabs(C)towards

eachotherandpushouttheswitch.


Cleantheswitchandcheckitsresistanceas

follows:

Connectanohmmeterasshowninthefig.

Theresistanceshouldbe:

Inthestopposition

lessthan0.1ohm.

Intherunposition

morethan1000ohm.

Assembly

Fittheearthscrew(A)andcable(B).

Note!Onsomemodelstheearthcableshould

beconnectedtotheearthscrew.

SAFETYE

QUIPMENT

B

CA

Presstheswitchintothesocketonthetankunit.

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52English

Throttlelock

Removethetankunitfromtheengine

assembly.Seepage103.

!

WARNING!

Thefuelusedinthechainsaw

posesthefollowinghazards:

1.

Theliquidanditsvapours

are

poisonous.

2.

Cancauseskinirritation.

3.

Ishighlyinflammable.

Dismantlethethrottlelockpin(A)

usingapunch.

Dismantling

A

SAFETYEQUIP

MENT

Turnthethrottlelockas

showninthefigure,andlift

itoutwiththespringfrom

thecut-outinthehandle.

Saw394

Slidethethrottlelockand

removeitforwardsas

showninthefigure.

Saws61

,268,268K,

272XP,2

72K,272S,

281XP,288XPand

394.

Saws61,268,272XP,2

72K,

272S,281XPand288

XP.


Carefullypriseupthelock

fromtheslotandremove.

Saws36,41,42,55,

242XP,246,51,

254XP,257

and

262XP.

Othersaws.

Saws40,45.

Seecontinuationonnextpage.

Saw3120.

Seecontinuationonnext

page.

English53

Dismantlethethrottlepin(B)byusinga

punch.

Dismantlethethrottle.Onsaw394,also

removethethrottlecable.

B

Removethethreescrewsinthesideofthe

handleaswellasthescrew

holdingthe

springunderthehandle.

Liftoutthethrottlelockandthethrottle.

Saw3120

Removethethreepinswithapunch.

Pressthethrottlelockdownandmove

itandthetriggerforwardsuntilthe

backedgeofthelockappears.

Liftoutthetriggerlock.

Removethespringswhereappropriate.

Saws36,41,42,55,242XP,246,51,254XP,

257and262XP.

Removetherubberelement(A).Slideout

thethrottlepin(B)andliftoutthethrottlearm

andspring.

A

B

A

SAFETYEQUIPMENT

Saws61,268,268K,272XP,272K,272S,

281XP,288XPand394.

Saws40and45

Liftoutthethrottlewithcablefrom

thefront.

54English

Cleaningandinspection

Cleanallparts.

Checkthatthesprings,wherefitted,are

OKandhavethecorrecttension.

Checkthatthelock'sactivation

mechanismisnotworn.Forexamplesof

theactivationmechanism,seethefigure.

SAFETYEQ

UIPMENT

Onthosesawsfittedwithathrottlecable,check

thatthecableandleverareOKandrunfreely.

English55

Assembly

SAFETYE

QUIPMENT

Fitspringsinap

propriatecases.

!

Othersaws.

Saws36,40,41,45,42,

242XP,246,51,55,

254XP,257and262XP.

Onsaw394,fitthecable

tothetrigger.Insertthem

intothehandlefromthe

front.

Fitthecab

letothetrigger

andinstall

thethrottlelock

andtrigger.

Fitthetriggerwiththecable

fromthefront.

Fitthepin(B)andspring

(whenused).

Fittheside

ofthehandle

usingthreescrewsonthe

sideandoneunderneath,

whichhold

sthespring.

Fitthespringandslidethe

throttlelockforwardsfrom

abovesothatitsrearedge

canbeslidinundertheedge

ofthehandle.

Allsawsexcept40and4

5continueonthenextpage.

Saws61,268,268

K,

272XP,272K,272

S,

281XP

and

288X

P.

Seenextpage.

Saws36,41,42,242XP,

246,51,55,254XP,257,

262XPand394.

B

WARNING!



1.

Theliquidanditsvapours

are

poisonous.

2.

Cancauseskinirritation.

3.

Ishighlyinflammable.

Saws40,45.

Saw3120.

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56English

SAFETYEQUIPMENT

Saw3120.

Fitthethreepinsthathold

thecablebracket,throttle

lockandtrigger.

Saws61,268,268K

,

272XP,272K,272S

,

281XPand288XP.

Fitthethrottlelockand

spring.Onsaw394,twist

asshowninthefigure

whenfitting.

Fitthethrottlearmand

spring.Fitthepinand

the

tworubberdampers.

Saws36,41,42,242XP,

246,51,55,254XP,257,

262XPand394.

Fitthethrottlelockfro

mthe

front.

Fitthethrottlelockpin.

Fitthetankunit.Seepage1

05.

English57

Dismantling

Dismantlethestarter

Seetheoperatinginstructions.

Pulloutthecord20-30cmandinsertitinto

thecut-outinthestarterpulleyrim.

Somesawshaveseverallongcut-outs.

Rotatethestarterpulleyanticlockwiseuntil

thespring-tensiononthestarterpulleyceases.

Dismantlethestarterpulley'scentreboltand

washer.

! Ifthestarterhasacordguide(A),remove

this

Liftoutthestarterpulleycarefully.

Ifthecordistobereplaced,cutitoffandpull

outthebitsfromthehandleandstarterpulley

usingapairoflongnosedpliers.

!WARNING!

Ensurethatthespringdoesnot

flyoutandcausepersonalinjury!


Ifthespringistobereplaced,removetheold

springfrom

thestarterpulley.Somesaws

haveaprotectiveplateoverthespring.

STARTE

R

WARNING!

Ifthespringtensionisreleased

whenliftingthestarterpulley,the

springcanflyoutandcauseper-

sonalinjury!


A

58English


!WARNING!



Cleanallpartsandcheckthefollowing:

Thestartercord.

Thedogsinthestarterpulley.

ThatthepawlsontheflywheelareOK,and

springbacktowardsthecentreandmovefreely.

STAR

TER

Changingtheferrule

Removethepartsoftheoldferrule.

Fitthenewferruleinthestarterhousing.

Useawrench,spacer(A)andball(B).

Splayouttheferruleontheinsideas

showninthefigure.

B AEnglish59

Assembly

!WARNING!



Ifanewspringistobefitted,positioninits

security/holdersothattheeyeisoverthe

studinthestartercover.

Slideinthespringandremovethesecurity/

holder.

Ifanewcordistobefitted,putthefreeendintheholeonthestarterpulley.Griptheendusinglong

nosedpliersandpullthecordthrough.

36and41.

Screwthecordtothestarter

pulley.

Secureth

ecordonthe

starterpulley.

Knotthecordonthestarter

pulley.

61,268,27

2,281and288.

42,242,246,51,55,254,

257,262,394and3120.

Continues

onnextpage.

STA

RTER

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60English

Ifthestarterunithasacoverplate(B)over

thespring,fittheplate.

Fitthestarterpulley.Rotatebackandforth

untilthestarterpulleycatchesinthespring.

Fitthestarterpulleywasherandboltand

tightentheboltto4Nm.

Ifthestarterhasacordguide(A),fitthis.

Pulloutthecordthroughtheholeinthecover

andfitthehandle,securewithadoubleknot.

Pulloutthecord20-30cmandinsertitinto

thecut-outonthestarterpulleyrim.Some

sawshaveseverallongcut-outs.

Rotatethestarterpulleyclockwiseuntilthe

cordiscorrectlytensioned.

A.Pulloutthecordcompletelyandholdthe

pulleywithyourthumb.

B.Inthispositionitshouldbepossibletoturn

thestarterpulleyafurther1/2-3/4turn.

Fitthestarteronthecrankcase.Tightenthe

boltsto4Nm.

STARTER B

Greasethereturnspringandstarterpulley

bearing.

Checkthecordtension

A

English61

Ignitionsystem

ELECTRICALSYSTEM

Dismantling

Saws36and41.

Loosentheflywheelnutandunscrewit1

turn

Tapthenutquicklywithahammersothat

theflywheelcomesloose

Removethenutandflywheel.

Othersaws,seenextpage.

Loosenthecablethatrunstothestop

switchfromtheignitionmodule.

Releasethecablesfromtheguiderailand

removetheguiderail.

Intheeventofafaultintheignitionsystem

theignitionmoduleshouldbecheckedbefore

dismantlingtheignitionsystem.

Checktheignitionmoduleasfollows:

Connecttestsparkplug5027113-01tothe

HTleadandclampthetestsparkplugtothe

cylinder.

Turntheengineoverusingthestarter.

Ifthetestsparkplugsparkstheignition

moduleisOK.

Removethecylindercoverandthestarterunit.

Removethesparkplugandfitthepistonstop.

62English

Unscrewthetwopawlsandsprings

locatedontheflywheel.

Loosentheflywheelnutandundountilit

alignswiththeendoftheshaft.

Allsawsexcept36and41.

Fitpuller5025149-02andloosenthe

flywheel.

Removethepuller,nutandflywheel.

Continuationallsaws

Removetheignitioncoil.

ELECTRICA

LSYSTEM

Thegeneratorcanbeunscrewedifthesawis

fittedwithahandleheatingsystem.

Removeallpartssothatthecablecanbe

released.Seeapplicablesections.

English63


Assembly

Fitthegeneratorifthesawisfittedwith

handleheating.

Tightentheboltsto4Nmandlockusing

Loctite.

Fitthecabletotheactualcontactonthe

saw.Adjustthelengthofthecableby

knottingit.

Replacetheflywheelwasherandnut.

Tighteningtorque,see"Servicedata".

Removethepistonstop.

Fittheignitionmodule

withouttighteningthe

screws.

Turntheflywheelsothatits

magnetisbesidethe

ignitionmodule.

ELECTRIC

ALSYSTEM

Cleanallparts,especiallytheflywheeland

shafttaper.

Checkthattheflywheelisnotcrackedor

damagedinanyotherway.

Placetheflywheelonthecrankshaft.Rotate

gentlyuntiltheflywheel'skeymatesinthe

keywayontheshaft

Continue

assemblyon

nextpage.

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64English

ELECTRICALSY

STEM

Insertfeelergauge5025134-02

(0.3mm)betweentheignitionmodule

andtheflywheel'smagnet.

Pushtheignitionmoduletowardsthe

flywheelandtightentheboltsto4Nm.

Fittheguiderail,insertthecablesandfit

thecabletotheignitionmodule.

Stopswitch

Thestopswitchisdescribedinthesection

"Safetyequipment".Seepage51.

Saws42,242,246,281and288.

Othersaw

s.

PushtheHTcablethroughthesparkplug

coverandfitthecontactspringusingthe

pliers.

Slidethesparkplugcoveroverthecontact

spring.

Fittheignitioncoil,whichislocatednextto

thecarburettorandconnectthecables.

Fitthestarterandcylindercover.

Fitthestarterandcylindercover.

MakeaholeintheHTcableusingpliers

5025006-01.

Fittingthesparkplugcover

English65

ELECTRICALSYSTEM

Handleheating

Somesawsareequippedwithanelectric

handleheating.Thisconsistsofthefollowing

parts:

Generator.

Powerswitch.

Heaterloopinthetankunit.

Handleloopwithheaterloop.

(Oneortwoloops).

Description

Theabovecomponentsareconnectedin

series,whichmeansthatifthereisafaultin

one,allcomponentsstopworking.

Thewiringdiagramisshowninthefigureto

theright.Theorderofcomponentscanvary

fromsawtosaw.

A1

B

C

D

E

A2

Troubleshootingcantakeplacewithmost

componentsconnectedtothesaw.An

ohmmeterisrequiredfortroubleshooting.

Beforetroubleshootingindividual

componentsremovethepowerswitchand

disconnectoneoftheswitch'scables.

Removeothercomponentsasnecessary.

E.g.thecylindercover.Seetheoperating

instructions.

Troubleshootingindividualcomponents,see

nextpage.

Measurementpoints:

A1andA2Earth.E.g.thecylinder

A1-B

Measurementofthegenerator

B-C

Measurementofthehandleloop

C-D

Measurementoftheheaterloops

intherearhandle

D-A2

Measurementofthepowerswitch

Troubleshooting

66English

ELECTRICA

LSYSTEM

Checkingthegenerator

Connecttheohmmetertothecylinder

(pointA1)andpointB.Theohmmeter

shouldread0.9-1.3ohm.

Replaceageneratorthathashigheror

lowervalues.

ConnecttheohmmetertopointsBandC.

Theohmmetershouldread3-4ohm.

Replacethehandleloopthathasahigher

value.

ConnecttheohmmetertopointsCandD.

Theohmmetershouldread0.7-2.5ohm.

Replaceaheatloopsthathashigher

values.

Checkthehandleloop

Checkingtheheatloopsintherearhandles

A1

B

B

C

Connecttheohmmeteracrosstheswitch.

Theohmmetershouldreadmorethan

1000ohmwiththeswitchinposition"0".

Theohmmetershouldread,atthehighest,

0.1ohmw

iththeswitchinposition"1".

Checkingthepowerswitch

D

C

English67

Dismantling

Removethebarandchain.Seetheoperat-

inginstructions.

On268K

and272K,removethecutting

attachment.Seetheoperatinginstructions.

On272S,removethegrinderattachment.


Useaspannerandremovetheclutch.On

saws36and41usetheservicetoolno.530

0311-12.

Note!Left-handthread.

Sawswiththree

coilsprings.

Removethe

springbyfirst

liftingashoe

usingasuitable

spacer(A).

Then

remo

ve

the

clutch

shoes.

Removethespringsusinga

screwdriver.

Then

removetheclutch

shoes.

Sawswithone

longspring.

Priseoutthespringheels

usingascrewdriver.Remove

thespringsfrom

theother

sideusingcirclippliers.Then

removetheclutchshoes.

CENTRIFUGALCLUTCH

A

Removethesparkplugandinsertthepiston

stop.

SawswiththreeC-springs.

Removetheclutch

drumandneedlebearing.

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68English


ThatmeasurementAisnotbelow1mm.

Checkthatthereisnoplay

betweenthe

clutchshoeandclutchhub

Checkforwearonthechainsprocket.

Checktheconditionoftheneedlebearing

andthebearingsurfaceonth

ecrankshaft.

Thattheclutchdrum

friction

surfaceand

bearingsurfaceareundamag

ed.

ThatmeasurementBisnotunder1mm.

Cleanallpartsandinspectthefollowing:

CENTRIFUGALC

LUTCH

B

A

Clutchshoes

withchamfers.

Clutch

shoes

withoutchamfers.

English69

Assembly

Greasetheneedlebearing(C)andfitonto

thecrankshaft.Thenfittheclutchdrum.

NOTE!Thebearingcanalsobegreased

laterthroughtheholeonthecrankshaft.

Fitthechainandbar.Seetheoperatinginstruc-

tions.On268Kand272K,fitthecuttingattach-

ment.


Topreventimbalanceallclutchshoesshould

bereplacedatthesametime.

Usingaspannersecuretheclutchcentre.

Onsaws36and41useservicetoolno.

5300311-12.

Note!Left-handthread.

Sawswiththree

coilsprings.

Sawswithone

longspring.

Sawswithth

reeC-springs.

Locatetheclutchshoeson

thehubandfitthesprings

withthehelpofpliers.

Locatetheclutchshoesonthe

hub.Liftashoeusingasuit-

ablespacer(A)andfitthe

spring.

Locatetheclutchshoesonthe

hubandfitthespringswiththe

helpofcirclippliers.

CENTRIFUGAL

CLUTCH

C

A

Removethepistonstopandfitthespark

plug.

NOTE!Theclutch

springsshouldnotbe

openedoutmorethan

necessary.Riskof

deformation.

70English

LUBRICATIO

NSYSTEM

Dismantling

Saws36,40,41,45,51and55.Seepage72

Othersaws.

Removethepumpdriveandwasher.

Undothethreebolts(A)andremovethe

oilpump.Somepumpshavetobe

removedbyusingextractorscrews.M5

screwsshouldbeinsertedintothe2

threadedholesinthepumpbodyand

tightenedequallytoliftthepumpand

thrustwasher.Otherpumpshaveacut-out

(C)forascrewdrivertopriseoffthepump.

Bothtypesareshownbelow.

Saws42,242XP,246,254XP,262XPand257.

Saws61,268,272XP.Seenextpage.

Saws281XPand288XP.Seenextpage.

Saw394.Seepage72.

Dismantletheoilpumpasfollows:

1.Unscrewscrew(A)andremovelocking

clip(B).

2.Undoscrew(C).

3.Leveroutthepumppiston(D)and

plasticplug(E)usingascrewdriver.

4.Removetheseal(F).

C

F

B A

D

E

Dismantlethefollowingparts:

S

tarter.Seetheoperatinginstructions

Centrifugalclutch.Seepage67.

Saw3

120.Seepage72

A B C

English71

LUBRICAT

IONSYSTEM

Saws61,268,272XP.


1.Removethelockwasher(A),washer,

springandadjusterscrew(B).

2.Removethelockinglacquerandundo

screw(C).

3.Knocktheedgeofthepumphousing

againstapieceofwoodsothatthe

pumppiston(D)slidesoutofthe

housing.

4.Removethepinion(E)withwashers

andsprings.

5.Removethepin(F).

6.Removetheseal(G).

7.IfnecessaryremovetheO-ring(H).

A H

F B G

E

C

D

F A

D E

C

B

Saws281XPand288XP.


1.Undotheadjusterscrew(A).

2.Removetheplug(B)withpumppiston

(C)andspringwithwashers.

3.DismantletheO-ring(D).Replaceif

necessary.

4.Ifnecessary,replacetheseal(E).

5.Ifnecessary,replacetheO-ring(F).

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72English

Saw394.


1.Dismantlethescrew(A)sothatthe

springandlatchpin(B)canbe

removed.

2.Leveroutthepumppiston(C)withthe

plasticplug(D)usingascrewdriver.

3.Removetheseal(E).

A

BC

D

E

Saw3120.

Undothethreeboltsthathold

theoilpumpandliftupthepump

bythecut-outfortheadjuster

screw.Liftoffthepumpand

loosenthewireformanualoil

supply.


1.Undo

thescrews(A)andremovethepartsas

show

ninthefigurebelow.

2.Undo

screw(B).NOTE!Left-handthread.

B

A

LUBRICATIONS

YSTEM

English73

Saws36,40,41,45,51and55.

Dismantlethechainguideplatesasshown

inrespectivediagramsbelow.

36/41

40/45

51/55

Saws36,40,41and45.

Undothetwoboltsandliftoffthepump

andtheupperseal.

LUBRICATION

SYSTEM

Saws51and55.

Liftoffthepumpandtheupperseal.

Takethepumpapartasshowninth

eexplodedviewon

thenextpage.

74English

LUBRICATIO

NSYSTEM

36/41

40/45

50/51

A.

Lowerseal.

B.

Pumpcylinder.

C.

Upperseal.

D.

Chainguideplate.

E.

Pumphousing.

F.

Pumppiston.

G.Wormgear.

C

B

A

D

E

F

G

D

E

F

G

C

B

A

A

B

C

E

F

G

English75

LUBRICAT

IONSYSTEM

Dismantlingtheoilpump's

wormgear

Onsomesawsthewormgearfortheoil

pumpispressedonthecrankshaft.

Removethewormgearbyusingthe

servicetoolforthesawinquestion.See

"Tools".

Firstscrewthetoolontotheentireworm

gear

Turnthescrewuntilthewormgearis

removed.

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76English

LUBRICATIONS

YSTEM


Cleanallpartsandcheckthefollowing

whenappropriatetothesawinquestion.

Thatthetaperontheadjusterscrew

showsnosignsofwear.

Thatthepumppiston'seccentricfacedoes

notshowsignsofwear.

Theoilpipeisnotblockedandthefilter

screenisclean.

Thatallsealsareundamaged.

Thatthewormgearontheoilpumpdrive

isundamaged.

Thatthepumppiston'spiniongearisundamaged.

English77

Assemblingtheoilpump

LUBRICATION

SYSTEM

Fittheoilpumpasfollows:

1.ApplySAE30oiltoallmovingparts.

2.Insertthepumppiston(D)with

washersandspring.

3.Pressinthepumppistonalittlemore

andscrewintheadjusterscrew(C).

4.Inserttheplasticplug(E).

5.Refitscrew(A)andlockingclip(B).

6.Fittheseal(F).

C

F

B A

D

E

Saws42,242XP,246,254XP,262XPand257.

Saws61,268,272XP.

A H

F B G

E

C

D

I

Seecontinuation,page80.


Assemblingthewormgear

Onthosesawswheretheoilpumpworm

gearispressedonthecrankshaft.

Screwthewormgearintothedismantling

toolandpressthewormgearontothe

crankshaftuntilitbottomsagainstthe

collar.



2.Fittheseal(G)ifnecessary.

3.Pressinpin(F).

4.Locatethepinion(E)withwashersand

spring.

5.Insertthepumppiston(D)throughthe

pinion,springandwashersinthepump

housing.

6.Fitscrew(C).Thescrewshouldbe

lockedusingLoctiteorlockinglacquer.

7.Fittheadjusterscrew(I)withwashers,

springandlockingclip(A).

8.FittheO-ring(H).

78English

LUBRICATIO

NSYSTEM

F A

D E

C

B

Saws281XPand288XP.


1.ApplySAE30oiltoallmovingparts

2.Fittheseal(E)ifnecessary.

3.Fittheplug(B)andspringwithwashers

onthepumppiston(C)andfittheunit

inthepumphousing.

4.Fittheadjusterscrew(A)inthepump

housing,andthroughtheholeinplug

(B).

5.FittheO-rings(D)and(F).

Saw394.



2.Fitthepumppiston(C)withwashers

andspringinthepumphousing.

3.Fitthelatchpin(B),pressinthepump

piston(C)alittlemoreandfitthe

adjusterscrew(A).

4.Fittheseal(E).

5.Fittheplug(D).

A

BC

D

E


Seecontinua

tion,page80.

English79

LUBRICAT

IONSYSTEM

Saw3120.


1.ApplySAE30oiltoallmovingparts

2.Fittheseal(C).

3.Fitthepumppiston(D)withspring.

Pressinthepistonandholditin

positionwithascrewdriverfromthe

pumphousing'sinsideinslot(E).

4.Fitscrew(B)sothatitispositioned

approx.oneturnfromthebottom.

NOTE!Left-handthread

B

A

5.Fitleverarm(F).

6.Fitunits(B-F-G)withspring(H)and

screwinpositionusingscrews(A)and

latch(J).

7.Removethescrewdriver.

8.FitanewO-rings(K)and(L).

C

KF

D

E

H

G

J

Fitthewireformanualoilsupply.

Seecontinuationonnextpage.

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80English

LUBRICATIONS

YSTEM

Saws42,61,242,246,254,257,262,268,272,281,288,394and3120.

1.Lubricatethepiniongearwithgrease.

2.Fittheoilpumponthesawby

tighteningthethreebolts.

3.Ifthetaperedsleevehasbeenused,

removeit.

4.Fitthecentrifugalclutch.

Seepage69.

5.Fitthebarandchain.

6.Adjusttheoilpumpforthecorrectoilflow.


Saws61,268,272,281and288

Usethetaperedsleevewhich

isplacedontheshaftwhen

fittingtheoilpump.Otherwise

thesealswillbedamaged.

English81

Saws36,40,41and45,see

continuationonthenextpage.

Saws51and55,seecontinuation

onthenextpage.

36/41

40/45

50/51

A.

Lowerseal.

B.

Pumpcylinder.

C.

Upperseal.

D.

Chainguideplate.

E.

Pumphousing.

F.

Pumppiston.

G.

Wormgear

C

B

A

D

E

F

G

D

E

F

G

C

B

A

A

B

C

E

F

G

LUBRICATION

SYSTEM



2.Fitthewormgear(G)onthe

crankshaft,ifnecessary

3.Fitthepumppiston(F)inthepump

cylinder(B).

4.Fillthepumprecesswithgrease.

5.Fittheunitinthepumphousing(E).

Ensurethepumpcylinder'scut-out

alignsinthepumphousing.

6.Fitthelowerseal(A)onthecrankcase.

Saws36,40,41,45,51and55.

82English

Fitthechainguideplatesaccordingto

respectivediagramsbelow.

36/41

40/45

51/55

Fittheoilpumpinthecrankcase,tighten

thetwoboltsandfittheupperseal.

Fittheoilpumpinthecrankcaseandfit

theupperseal.

LUBRICATIO

NSYSTEM

Saws36,40,41and45.

Saws51and55.

Fitthebarandchain.

English83

CARBURETTOR

Description

Thediagramsinthisdescriptiondonot

correspondwiththecarburettorfittedon

thechainsaws.Theyserveonlytoshow

theprinciplesofdesignandoperation.

Design

BCA

Themeteringunit(A)containsthejetsand

fuelcontrolfunctions.Itisherethecorrect

amountoffuelforthegivenenginespeed

andpowerismetered.

Themixingventuri(B)housesthechoke,

throttlevalveanddiffuserjets.Hereairis

mixedwiththefueltogiveafuel/air

mixturethatcanbeignitedbytheignition

spark.

Thecarburettorconsistsofthreesub-systems:

Meteringunit,A.

Mixingventuri,B.

Pumpunit,C.

Inthepumpunit(C),fuelispumpedfromthe

fueltanktothemeteringunit.Onesideofthe

pumpdiaphragmisconnectedtothecrankcase

andpulsesintimewiththepressurechangesin

thecrankcase.Theothersideofthediaphragm

pumpsthefuel.

WARNING!

Thefuelusedinthechainsawposes

thefollowinghazards:

1.Theliquidanditsvapoursare

poisonous.

2.Cancauseskinirritation.


!

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84English

Operation

Thecarburettoroperatesdifferentlyinthe

followingmodes:

Coldstart

Idling

Partthrottle

Fullthrottle

D

E

F

G

H

G

H

F

G

E

F

G

Intheidlingmode(H)thethrottlevalveis

closed.Airissuckedinthroughan

apertureinthethrottlevalveandasmall

amountoffuelissuppliedthroughthe

diffuserjet(G).

Inthepartthrottlemodethethrottlevalve

(H)ispartiallyopen.Fuelissupplied

throughthediffuserjets(FandG).

Inthefullthrottlemodebothvalvesare

openandfuelissuppliedthroughallthree

diffuserjets(E,FandG).

CARBURETT

OR

Inthecoldstartmodethechokevalve(D)

isfullyclosed.Thisincreasesthevacuum

inthecarburettorandfueliseasiertosuck

fromallthediffuserjets(E,FandG).The

throttlevalve(H)ispartlyopen.

English85

CARBURETTOR

! Seethecarburettorinquestiononthenext

fourpagesandtheinstructionsbelow.

Plugs

Whencleaningthecarburettortheplugs

mustberemoved.Removeasfollows:

1.Drillaholeintheplug.

2.Insertascrewdriverorpunchinthehole

andpriseuptheplug.

Semifixedjet/fixedjet

Somecarburettorshaveanextrajet(semi

fixedjet).Thejetisofbrassandislocated

inthemeteringunitandisusedtogivea

fuelsupplement.Onaverage10%ofthe

fuelpassesthroughthejet.

Belowornexttothejetisascreenwhich

needstobecleaned.

Dismantlethejetand/orscreeninoneof

thefollowingways:

1.Knocktheunitintotheventuriusinga

punchandtaketheunitapart.(some

Tillotsonmodels).

2.Dismantlethelockwasheroverthejet

andliftoffthejetandscreen.

Dismantleallpartsnecessaryandremove

thecarburettorfromthesaw.Onsome

modelsthecylinderneedstobeloosened

andliftedtobeabletoremovethe

carburettor.

WARNING!




poisonous.



Dismantling

86English

TillotsonHS255B

AB

H

E F G

I J C

H

K

1.Removethecover(A)overthemetering

unitandcarefullyremovethecontrol

diaphragm(B)withthegasket.

2.Undothescrew(H)andtakeout

theneedlevalve(C)withlever

arm,shaftandspring.

3.Removethecover(E)overthepumpunit

andcarefullyremovethegasket(F)and

thepumpdiaphragm(G).

4.Usinganeedleorthelikecarefully

removethefuelscreen(D).

5.Unscrewthehighandlowspeedjet

screws.

6.Removetheplugs(J).Seepage85.

7.Ifnecessaryremovethethrottleand

chokevalvesaswellastheshafts,lever

armsandsprings.

8.Removethespeedgovernor(I).(Only

272K,268Kand272S).

9.Removethesemifixedjet(K).Seepage85.

AB

H

E F G

J CD

D

CARBUR

ETTOR




2.Undothescrew(H)andtakeout

theneedlevalve(C)withleverarm,

shaftandspring.




4.Usinganeedleorthelikecarefullyremove

thefuelscreen(D).


screws.

6.Removetheplugs(J).

Seepage85.

7.Ifnecessaryremovethethrottleandchoke

valvesaswellastheshafts,leverarms

andsprings.

TillotsonHS228B

English87

WalbroHDAandHD

D G F E

A B H C J




2.Undothescrew(H)andtakeoutthe

needlevalve(C)withleverarm,shaftand

spring.

3.Removethecover(E)overthepump

unitandcarefullyremovethegasket(F)

andthepumpdiaphragm(G).


thefuelscreen(D).


screws.

6.Removetheplug(J).Seepage85.


valvesaswellastheshafts,leverarmsand

springs.

TillotsonHS260A

AB

H

E F G

J C

H

K






spring.





thefuelscreen(D).


screws.




andsprings.


D

CARBURETTOR

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88English

CARBURETT

OR

WalbroWG






spring.





thefuelscreen(D).

5.Unscrewthelowspeedjetscrews.




andsprings.


WalbroWJ

AB

H

E F G

J C

K






spring.





thefuelscreen(D).


screws.




andsprings.


D

D G F E

A B H C K J

English89

WalbroWT

E F G

C J B

H

K

A

ZAMAC1Q-EL1






spring.





thefuelscreen(D).


screws.

6.Ifnecessaryremovethethrottleand

chokevalvesaswellastheshafts,lever

armsandsprings.





needlevalve(C)withleverarm,shaft

andspring.

3.Removethecover(E)overthepump

unitandcarefullyremovethegasket(F)

andthepumpdiaphragm(G).


thefuelscreen(D).


screws.




andsprings.

8.Removethesemifixedjetwithdiffuser

jet(K).Seepage85.

CARBURETTOR

D

A B H

C D G F EK

90English

CARBURETTOR


Usecompressedairtodrythepetrolonthe

components.Directtheairthroughall

channelsinthecarburettorhousingand

ensurethattheyarenotblocked.

Refertothecarburettordiagramin

questiononthepreviouspagesandcheck

thefollowing:

1.Thatthegasketandpumpandcontrol

diaphragmsareundamaged.

2.Thatthereisnoplayonthethrottleand

chokevalveshafts.

3.Thattheneedlevalveanditsleverare

notworn.

4.Thatthefuelscreenisundamaged

5.Thatthetipsofthehighandlowspeed

jetscrewsarenotdamaged.

6.OnTillotsonHS255B,thatthespeed

governor(I)isclean.

7.Thattheairintakemanifold

isnotcracked.

WARNING!




poisonous.



Cleanallcomponentsinpetrol.Wear

glovesorskinprotectioncream.

WARNING!

Neverdirectthecompressedair

jettowardsthebody.Aircanbe

forcedintothebloodstreamand

cancausefatality.

!

!

English91

Plugs

Whencleaningthecarburettortheplugs

mustberemoved.

Reassembleasfollows:

1.Placetheplugintheholewiththe

convexsidefacingupwards.

2.Expandtheplugbyusingapunchon

thetopside.

Semifixedjet/fixedjet

Somecarburettorshaveanextrajet(semi

fixedjet).Thejetisofbrassandislocated

inthemeteringunitandisusedtogivea

fuelsupplement.Onaverage10%ofthe

fuelpassesthroughthejet.

Belowornexttothejetisascreenwhich

needstobecleaned.

Reassemblethejetand/orscreeninone

ofthefollowingways:

1.Puttogethertheunitandfititinthe

carburettorbymeansofapunch(Some

Tillotsonmodels).

2.Fitthejetwithscreenandlockwasher.

CARBURETTOR

Assembly

Refertothecarburettorinquestiononthe

nexteightpages.Apressuretest,see

page100,shouldbecarriedoutafter

assemblingandbeforethecarburettoris

refittedtothesaw.

!WARNING!



1.Thefluidanditsvapoursare

poisonous.



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92English

CARBURETT

OR

1.Ifthethrottleandchokevalves,shafts,

leverarmsandspringshavebeen

dismantledthesemustbereassembled.

Lubricatetheshaftbearingsusinga

lightoil.

2.Fittheplugs(J).Seepage91.

3.Fitthehighandlowjetscrewsand

springs.NOTE!Donottightenthe

screwsagainsttheseats.Thiscan

damagetheseatsandneedletips.

4.Fitthefuelscreen(D)byusingthe

handleofasmallscrewdriver.

5.Fitthepumpdiaphragm(G),gasket

(F)andcover(E)onthepumpunit.

6.Fittheneedlevalve(C)withleverarm,

shaftandspringandtightenscrew(H).

7.Check,usingorarulerorthelike,that

theleverarmislevelwiththechamber

floor.Seethefiguretothelowerright.

Theleverarmcanbebentifnecessary

toachievethecorrectsettings.

8.Fitthecontroldiaphragm(B)with

gasketandcover(A)onthemetering

unit.

9.Carryoutapressuretest.

Seepage100.

TillotsonHS228B

Maintainahighlevelofcleanlinesswhen

reassemblingthecarburettor.Evensmall

particlesofdirtcancauseoperating

problems.

AB

H

E F G

J CD

English93

TillotsonHS255B




Lubricatetheshaftbearingsusingalight

oil.


3.Fitthesemifixedjet(K).Seepage91.

4.Fitthehighandlowjetscrewsandsprings.

NOTE!Donottightenthescrewsagainst

theseats.Thiscandamagetheseatsand

needletips.

5.Fitthefuelscreen(D)byusingthehandle

ofasmallscrewdriver.





8.Check,usingorarulerorthelike,thatthe

leverarmislevelwiththechamberfloor.

Seethefiguretothelowerright.Thelever

armcanbebentifnecessarytoachieve

thecorrectsettings.

9.Fitthespeedgovernor(I).Lockwith

Loctiteorlockinglacquer.(Onlyappliesto

272K,268Kand272S).

10.Fitthecontroldiaphragm(B)withgasket

andcover(A)onthemeteringunit.

11.Carryoutapressuretest.

Seepage100.



particlesofdirtcancauseoperatingprob-

lems.

CARBURETTOR

AB

H

E F G

I J C

H

K

D

94English

TillotsonHS260A




Lubricatetheshaftbearingsusingalight

oil.



4.Fitthehighandlowjetscrewsand

springs.NOTE!Donottightenthescrews

againsttheseats.Thiscandamagethe

seatsandneedletips.











thecorrectsettings.



10.Carryoutapressuretest.Seepage100.



particlesofdirtcancauseoperating

problems.

CARBURETTOR

AB

H

E F G

J C

H

K

D

English95




Lubricatetheshaftbearingsusinga

lightoil.





needletips.











thecorrectsettings.







lems.

CARBURETTOR

WalbroHDAochHD

D G F E

A B H C J

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96English

1.Ifthethrottleandchokevalves,shafts,lever

armsandspringshavebeendismantled

thesemustbereassembled.Lubricatethe

shaftbearingsusingalightoil.






needletips.





7.Fittheneedlevalve(C)withleverarm,shaft

andspringandtightenscrew(H).




armcanbebentifnecessarytoachievethe

correctsettings.







lems.

CARBURETTOR

WalbroWJ

AB

H

E F G

J C

K

D

English97

WalbroWG




lems.

CARBURETTOR

D G F E

A B H C K J




Lubricatetheshaftbearingsusingalightoil.


3.Fitthefixedjet(K).Seepage91.




needletips.





7.Fittheneedlevalve(C)withleverarm,shaft

andspringandtightenscrew(H).




armcanbebentifnecessarytoachievethe

correctsettings.



10.Carryoutapressuretest.Seepage

100.

98English

WalbroWT




Lubricatetheshaftbearingsusingalightoil.






needletips.

5.Fitthefuelscreen(D)byusingthehandleof

asmallscre

husqwm271_hwen1997_1018855-26

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