MASTERPAC PC4012 Series User manual

1
TableofContents
1. SAFETYINFORMATION... 2
1.1SafetyPrecautions .. ..2
1.2OperatingSafety .. ..2-4
1.3OperatorSafetywhileusing InternalCombustion Engines .4-5
1.4LabelLocations ... 5
1.5SafetyandOperatingLabels ..6-7
2.TECHNICALDATA ... .. .. 8-9
3. OPERATION ... ... 10
3.1OperatingPrinciple 10
3.2DeliveryChecks .10
3.3BeforeStarting .. ..10
3.4ToStart .. 11-12
3.5ToStop .. .. .. 13
3.6Application ..13
3.7 Operation ..13
3.8Max. admissibleinclination .. .13
3.9Mainpartsandaccessories .. 14
4. MAITENANCE .. .. . 15
4.1 PeriodicMaintenanceSchedule .. 15
4.2Exciter ... .. 15
4.3V-beltand clutch .. ..16
4.4AirCleaner ... .16
4.5SparkPlug .. 17
4.6Transporting .. .17
4.7TroubleShooting .. .. .18-19
WARRANTY ... ....20
MAINTENANCERECORD .. ....21
ECDECLARATION .. ...22

2
SAFETYINFORMATON
1.1SafetyPrecautions
Beforeusing thisequipment,studytheentireowner smanualtobecome
familiarwithitsoperation.Donotallowuntrainedorunauthorizedpersonnel,
especiallychildren, tooperatethisequipment. Useonlyfactoryauthorizedparts
forservice.
ThismanualcontainsDANGER,WARNING,CAUTIONcallouts
whichmustbefollowed toreducethe possibilityofpersonalinjury,
damagetotheequipment, orimproperservice.
Thisisthesafetyalertsymbol.Itisusedtoalertyou topotential
personalinjuryhazards. Obeyall safetymessagesthatfollowthis
symboltoavoidpossibleinjuryordeath.
DANGERindicatesahazardoussituationwhich,ifnotavoided,
will result indeathorseriousinjury.
WARNINGindicatesahazardoussituationwhich,ifnotavoided,
couldresult indeathorseriousinjury.
CAUTIONindicatesahazardoussituationwhich,ifnotavoided,
couldresult inminorormoderateinjury.
1.2OperatingSafety
!ADDITIONALHAZARDS
lSlip/Trip/Fall isamajorcauseofseriousinjuryordeath.Bewareofunevenor
slipperyworksurfaces.
lExercisecarewhen workinginthevicinityof unprotectedholesorexcavations.
lNEVERallowanypersontooperatethemachinewithoutadequateinstruction.
!
!
DANGER
!
WARNING
!
CAUTION

3
SAFETYINFORMATON
lENSUREall operatorsread,understandandfollowtheoperatinginstructions.
lSERIOUSINJURYcouldresultfromimproperorcarelessuseof thismachine.
lPlatecompactorsareheavyunitsand shouldbepositionedbytwopeopleof
appropriatestrength.Usingtheliftinghandlesprovidedonthemachine,along
withcorrect liftingtechniques.
!MECHANICALHAZARDS
lDO NOToperatethe machine unless all protectiveguardsareinplace.
lKEEP handlesandfeet clearofrotatingandmovingpartsastheywill causeinjury
ifcontacted.
lENSUREthatthemotoroperationswitchisintheOFFpositionandthespark
plug ignition leadisdisconnected beforeremoving theguardsormaking
adjustments.
lENSUREboththe machineandtheoperatorarestablebysettinguponlevel
terrainandthemachinewill nottipover,slideoffall whileinoperation or
unattended.
lDO NOTleavethemachineinoperationwhileit isunattended.
lDONOTpull themachinebackwardwithtransportationwheels,itonlycouldbe
pushedforward.
lENSUREthatthewallsofatrencharestableand will notcollapseduetothe
actionof thevibration, priortocommencingcompaction.
lENSUREthatthe areatobecompacted doesnotcontainany “live”electrical
cables,gas,waterorcommunication serviceswhichmaybedamagedbythe
actionof vibration.
lEXERCISECAREwhenoperating unit.Exposuretovibrationorrepetitivework
actionsmaybeharmfultohandsandarms.
lNEVERstandon theunit whileitisoperating.
lDONOTincreasethe governed no-loadmotorspeed above3,500 r/min.Any
increasemayresult inpersonalinjuryand damagetothe machine.
lBE CAREFULnottocomeincontactwiththemufflerwhen the engineishot,
sinceitcancausesevereburns.
lENSUREthattherepairstothe motorandmachinearecarried outby
COMPETENTpersonnel.
!FIRE&EXPLOSIONHAZARDS
lPETROLisextremelyflammableandexplosiveundercertainconditions.
lENSUREthat thepetrolisonlystored inan approvedstoragecontainer.
lDO NOTrefuelthemotorwhileit isinoperation orhot.
lDONOTrefuelthemotorinthe vicinityofsparks,anakedflameoraperson
smoking.

4
SAFETYINFORMATON
lDONOToverfill thefueltankandavoidspillingpetrolwhenrefueling.Spilled
petrolorpetrolvapourmayignite.Ifspillageoccurs,ensurethattheareaisdry
beforestartingthemotor.
lENSUREthat thefueltankcapissecurelyfitted afterrefueling.
!CHEMICALHAZARDS
lDONOToperateorrefuelapetrolordieselmotorinaconfinedareawithout
adequateventilation.
lCARBONMONOXIDEexhaustgasesfrominternalcombustionmotordriven
unitscancausedeathinconfinedspaces.
!NOISE HAZARDS
lEXCESSIVE NOISE canleadtotemporaryorpermanent loss ofhearing.
lWEARan approved hearingprotectiondevicetolimitnoiseexposure.As
requiredbyOccupationalHealthandSafetyregulations.
PROTECTIVE CLOTHING
lALWAYSwearapprovedhearingprotectionwhenworkinginaconfinedwork
space.Protectivegogglesandadustmaskshouldbewornwhen workingina
dustyenvironment. Protectiveclothingandfootwearmayalsobedesirablewhen
working withhotmixbitumen.
1.3OperatorSafetywhileusing InternalCombustion Engines
lDONOTsmokewhenrefuelingtheengineorduring anyotherfuelhandling
operation.
lDO NOTrefuelahot orrunningengine.
lDO NOTrefueltheenginenearanopenflame.
lDO NOTspill fuelwhen refuelingthe engine.
lIffuelisspilledduring refueling,wipeitofffromtheengine immediatelyand
discardtheraginasafeplace.Donotoperatethe unitiffueloroil leaks
exist-repairimmediately.
lNEVERoperatethisequipment inan explosiveatmosphere.
lNEVERoperateanygaspoweredequipmentinapoorlyventilatedorenclosed
area.
lNEVERperform anyworkon theunitwhileitisrunning.Beforeworking on it,
stoptheengineanddisconnectthesparkplugwiretopreventaccidental
starting.
lAvoidprolongedbreathingofexhaust gases.

5
SAFETYINFORMATION
lAvoidcontactwithhot exhaustsystemsandengineparts.
lAllowengine tocoolbeforeperforming anyrepairsorservice.
lALWAYStransportandhandlefuelonlywhencontainedinapprovedsafety
containers.
lALWAYSkeeptheareaaroundthemufflerfreeof debrissuchasleaves,paper,
cartons,etc.Ahot mufflercouldignitethedebrisand startafire.
1.4LabelLocations

6
SAFETYINFORMATION
1.5Safetyand Operating Labels
MASTERPACmachinesuseinternationalpictoriallabelswhereneeded. Theselabelsare
describedbelow:
Label Meaning
DANGER!
Enginesemit carbonmonoxide;operateonlyin
well-ventilatedarea.Read theOperationManual
formachineinformation.Nosparks, flames,or
burning objectsnearthemachine.Shutoff the
enginebeforerefueling.Useonlyclean, filtered
unleadedgasoline.
WARNING!
Always wearhearing andeyeprotectionwhen
operatingthismachine.
CAUTION!
ReadandunderstandthesuppliedOperation
Manualbeforeoperating themachine. Failureto
do soincreasetherisk of injurytoyourselfor
others.
CAUTION
Liftingpoint.
WARNING!
Handinjuryif caughtinmovingbelt.
Always replacebeltguard.

7
SAFETYINFORMATION
Label Meaning
WARNING!
Hot surface!
GuaranteedsoundpowerlevelindB(A).
NOTICE!
Throttlecontrollever:
Turtle= IdleorSlow
Rabbit = Full orFast
Anameplatelistingthemodelnumberand serial
numberisattachedtoeachunit.Pleaserecord
theinformationfoundonthisplatesoit will be
availableifthenameplatelostordamaged.
When requestingserviceinformation, the serial
numbershouldbe specifiedof the unit.
Companylogo

8
TECHNICALDATA
2.TECHNICALDATA
Model PC4012H PC4012R PC4012L PC4012A
Engine Type Honda
GX160 RobinEX17
Lombardini
LD225 Hatz1B20
Power kw(hp) 4.0(5.5) 4.2(5.7) 3.5(4.8) 3.5(4.8)
OperatingWeight kg(lb) 85(187) 85(187) 98(216) 98(216)
PlateSizeLxW cm(in) 57x40(22x16)
CentrifugalForce kN 12
VibrationFrequency vpm(hz) 5400(90)
TravelSpeed m/min(ft/min) 22(72)
ExciterLubrication L0.15,SG15W-40motoroil
Model PC4515H
PC4515R PC4515L PC4515A
Engine Type Honda
GX160 RobinEX17
Lombardini
LD225 Hatz1B20
Power kw(hp) 4.0(5.5) 4.2(5.7) 3.5(4.8) 3.5(4.8)
OperatingWeight kg(lb) 90(198) 90(198) 103(227) 103(227)
PlateSizeLxW cm(in) 57x45(22x18)
CentrifugalForce kN 15
VibrationFrequency vpm(hz) 5400(90)
TravelSpeed m/min(ft/min) 24(78)
ExciterLubrication L0.15,SG15W-40motoroil
Model PC5018H
PC5018R PC5018L PC5018A
Engine Type Honda
GX160 RobinEX17
Lombardini
LD225 Hatz1B20
Power kw(hp) 4.0(5.5) 4.2(5.7) 3.5(4.8) 3.5(4.8)
OperatingWeight kg(lb) 113(249) 113(249) 126(278) 126(278)
PlateSizeLxW cm(in) 57x50(22x20)
CentrifugalForce kN 18
VibrationFrequency vpm(hz) 5400(90)
TravelSpeed m/min(ft/min) 20(66)
ExciterLubrication L0.25,SG15W-40motoroil

9
TECHNICALDATA
Model PC5021H
PC5021R PC5021L PC5021A
Engine Type Honda
GX160 RobinEX17
Lombardini
LD225 Hatz1B20
Power kw(hp) 4.0(5.5) 4.2(5.7) 3.5(4.8) 3.5(4.8)
OperatingWeight kg(lb) 115(254) 115(254) 128(282) 128(282)
PlateSizeLxW cm(in) 57x50(22x20)
CentrifugalForce kN 21
VibrationFrequency vpm(hz) 5400(90)
TravelSpeed m/min(ft/min) 22(72)
ExciterLubrication L0.25,SG15W-40motoroil
WorkingSize(mm):
Model A B C D
PC4012Series 1030 970 558 400
PC4515Series 1070 940 558 450
PC5018Series 1045 945 558 500
PC5021Series 1065 950 558 500
SoundSpecification (Accordingto2000/14/EC)
Model PC4012/4515/5018/5021
serieswithPetrolEngine PC4012/4515/5018/5021 serieswithDieselEngine
Measured soundpowerlevel102dB(A) 105dB(A)
Guaranteedsoundpowerlevel 108dB(A) 108dB(A)
Vibration Specification(According toISO2631andEN1033):5m/s2

10
OPERATION
3. Operation
3.1Operating Principle
The followinginstructionswerecompiled toprovide youinformation on howtoobtainlong
and troublefree useofthe unit. Periodicmaintenanceofthisunitisessential.Readthe
manualinitsentiretyandfollowthe instructionscarefully.Failuretodo somayinjure
yourselforabystander.
3.2DeliveryChecks
Immediatelyontakingdeliveryofyournewequipment andbeforeputtingit intoservice.
lRead theoperation manualcompletely—itcouldsaveagreatdealofunnecessary
expense.
lRead theengine manualsupplied.
lCheck the generalcondition ofthe equipment –hasit been damaged duringdelivery?
lCheck engine oil level.
lCheck fuellevels.
Recommended lubricantsaredetailedintheCareandMaintenancesection.
3.3BeforeStarting
ThefollowingPre-start-upinspectionmustbeperformedbeforethestartofeachwork
sessionoraftereveryfourhoursofuse,whicheverisfirst.Ifanyfaultisdiscovered,the
compactormust notbeuseduntil the fault isrectified.
1.Thoroughlyinspectthe compactorforsignsofdamage.Check componentsare
presentand secure.Payspecialattentiontothe beltdrivesafetyguardfitted
betweentheengineandthevibratorunit.
2.Check theengineoil levelandtop upasnecessary.
3.Check theenginefuellevelandtop upasnecessary.
4.Check forfueland oil leaks.
NOTICE: Check the oil levelinthe engine and exciter. Engine and compactorwarrantiesare
VOIDifthisunit isrun without oil.

11
OPERATION
3.4ToStart
3.4.1DieselEngine
1.Oil filling andlevelinspectionsmust becarried outwiththeengineonaflatsurface.
2.Removeoil filtercap,pourtheoil inand reassembleoil cap.
3.Makesurethat isnearlyat max., fitthedipstick correctlyback inplace
4.Check andrefill oil uptothemaximumlevel.
5.Shouldstart-upbe difficult, purgeairfromunion asindicatedinthe figure.
6.Donot fill the fueltankcompletely,butjustupto1cm(0.39in)fromthetopof the
tank,toprovidespaceforfuelmovement.Wipeanyfuelspillagefromenginebefore
starting.
7.Removefueltankcap.Pourthe fuelandreassemblefueltankcap.Withlow
ambienttemperatures(-10°C)add specificadditivestodieselfuel,toavoidparaffine
crystalssolidification.
8.Toeliminateanypossiblewateranddirtresidue fromthetankbottom,removethe
plug(A)andopen the cock(B)toenabledischarging.Oncetheoperationisover,
closethecock andscrewbackthe protecting plug.
9.Acceleratorat50%speed.

12
OPERATION
10. Takethe handleandpull softlytheropeuntil itisextended toitsfull limit. Letthe
roperewindcompletely.Start theenginepullingstronglytherope.
11. Tostoptheengine,leverand/orkeyinstopposition,acceleratorleverinstop
position.
3.4.2PetrolEngine
1.Openthe fueltapbymovingthefuelON/OFF
leverfullytothe right.
2.Ifstartingtheenginefromcold,setthechokeON
bymovingthechokeleverfullytotheleft.If
restartingawarm engine,thechokeisusuallynot
required.However,iftheenginehascooledtoa
degree, partialchokemayberequired.
3.TurntheengineON/OFF switchclockwisetothe
“1”position.
4.Setthethrottletotheidleposition bymovingthe throttleleverfullytothe right. Do
notstarttheengineonfull throttle,asthecompactorwill vibrateassoonasthe
enginestarts.
5.Takingafirm holdofthecontrolhandlewithonehand,grasptherecoil starter
handlewiththeother. Pull therecoilstarteruntilengine resistanceisfelt, thenlet
starterreturn.
6.Takingcarenottopull thestarter’scopefullyout, pull the starterhandlebriskly.
7.Repeatuntil theenginefires.
8.Oncethe enginefiresgradually,setthechokelevertotheOFFpositionbymoving
it totheright.
9.Ifthe enginefailstofireafterseveralattempts, followthetrouble-shootingguide.
10.Tostop the engine,setthe throttletoidleandturntheengine ON/OFF switch
anticlockwisetothe “0”position.
11.Turnthe fueloff.

13
OPERATION
3.5ToStop
1.Pushthe throttleleverto “O”position.
2.Turnthe keyswitchto “O”(off).
3.Closethefuelvalve.
3.6Application
TrenchcompactionEarthworks
RoadmaintenanceLandscaping
Brick paving Drivewaytopping
3.7Operation
Runengineatfullthrottleandallowplatetopull itselfalongatitsnormalspeed.When
operatingitmaybe necessarytoassistplatebypushing itforwardslightly.Depending
on thematerialbeing compacted,threeorfourpassesarerecommendedtoachievethe
bestcompaction.
The machineisbest suited tothecompactionofbituminousand granularmaterialse.g.
granularsoilssuchassiltandclayarebestcompactedusingtheimpact forceproduced
byavibratingrammer.Wherepossiblethesiteshouldbegraded andleveled before
commencing compaction.
Correctmoisturecontentinsoil isvitaltopropercompaction.Wateractsasalubricant
tohelpslidesoil particlestogether.Toolittlemoisturemeansinadequatecompaction;
too muchmoistureleaveswater-filledvoidsthatweaken thesoil’sload-bearingability.
Compactionofdrymaterialswill befacilitatedbymoisteningwithawaterhosefitted
withasprinkler. Excessivewatering orwatercontentwill causethemachinetostall.
The optionalwatertankkitisrecommended whenthemachineisusedonbituminous
surfacesasthewaterfilmpreventsabuildup ofmaterialonthe underside oftheplate.
3.8Max. admissibleinclination
20° 20°

14
OPERATION
3.9Mainpartsand accessories
A.ThrottleLever
B.Handle
C.ProtectiveFrame
D.Exciter
E.Blet cover
F.Baseplate
G.Belt
H.Clutch
I.Wheel(option)
J.WaterTank(option)
K.RubberMat (option)
A
B
C
D
E
F
G
H
I
J
K

15
MAINTENANCE
4MAINTENANCE
4.1PeriodicMaintenanceSchedule
Refertoenginemanufacturer’sOperationManualforadditionalinformation on engine
maintenance.AcopyoftheengineOperationManualwassupplied withthe machine
whenit wasshipped.Toservicetheengine, tiltthe seatforward.
Daily
Atfirst 20
hours Every50 hours
Every
100
hours
Every
200
hours
(Startingcheck) ●
Loosenedof lost screws ●
Damageofanypart ●
Functionof controllingsystempart ●
Exciteroil check ●
Exciteroil replacement ●
V-belt (clutch)check ●
Leakage ofoil fuel ●
Tightness offastening Threads ●
Engineoil checkand replenishment ●
Engineoil replenishment ●●
Aircleanercleaning ●
Theseinspectionintervalsareforoperation undernormal
conditions.Adjustyourinspectionintervalsbasedon thenumber
hoursplatecompactorisinuse, andparticularworking conditions.
4.2Exciter
When changingthe exciteroil, removethe drainplug locatedat the bottom-rightofthe
vibrator,andsimplytipthecompactortodraintheoil. Notethat theoil will drainmore
easilywhileit ishot.
!
CAUTION

16
MAINTENANCE
4.3V-beltand Clutch
4.3.1Checking theV-belt
After200hoursofoperation,removetheupperbelt
covertochecktheV-belttension (Figure2).Tension is
properifthebeltbendsabout10mm whendepressed
stronglywithfingerbetweenshafts.Looseorworn
V-beltsreducespowertransmissionefficiency,causing
weakcompactionandreducesthe lifeofthebelt itself.
NEVER attempttocheck theV-beltwiththeengine running.Severe
injurycanoccurifyourhand getscaughtbetweentheV-beltandthe
clutch.Always usesafetygloves.
4.3.2Replacing theV-belt
Removethe beltcovers. Engagean offsetwrench(13mm) orthe liketovibratorpulley(lower)
fasteningbolt. Engagewasteclothorthe likeatmidwayofV-belton the left side and while
pullingit back strongly, rotatetheoffset wrenchclockwisesothat the V-belt will comeoff.
4.3.3Checking theClutch
ChecktheclutchsimultaneouslywithV-beltchecking.Withbeltremoved,checkouter
drumof theclutchforseizureand “V”grooveforwearordamagewithyoureyes. Clean
the “V”grooveasnecessary.Wearoflining orshoeshouldbechecked withrunning
check.Ifthe shoeisworn,powertransmission becomesdeficientandslippingwill
result.
Wheneverthecompactor’svibrationbecomesweakorlostduring
normaloperation regardless ofoperation hours,check theV-beltand
clutchimmediately.
4.4AirCleaner
1.The airfilterelementshouldbecleanedbecauseaclogged
aircleanercancausepoorenginestarting, lackofpowerand
shorten enginelifesubstantially.
2.Tocleanorreplaceairfilterloosen thewingnuton theair
filterhousing (Figure1), removethe coverand takeoutair
filtercartridge. If onlycleaningof theairfilterisdesired blow
throughthe airfiltercartridge fromtheinside, moving ajet of
drycompressedairupanddownuntil all dustisremoved.
!
CAUTION
!
WARNING

17
MAINTENANCE
4.5SparkPlug
Check andcleansparkplugsregularly.Afouled,dirtysparkplugmaycausehard
startingand poorengineperformance. Setsparkplug gaptorecommended clearance.
Refertoenginemanual.
The mufflerandenginecylinderbecomeveryhot duringoperationand
remainhot forawhileafterstopping theengine.Allowenginetocool
beforeremovingsparkplug.
NOTICE:Aloosesparkplug canbecomeveryhotandmaycauseenginedamage.
4.6Transporting Trowels
1.Always shutoff enginewhentransportingmachine.
2.Makesureliftingdevicehasenoughcapacitytoholdmachine(see nameplateon
machineforweight).
3.Useliftingpoint(a)whenliftingmachine.
4. Trolleywheel(b)asoptionalisusedforshortdistancetransportation.
!
WARNING
a
b

18
MAINTENANCE
4.7Troubleshooting
4.7.1Machinetroubleshooting
SYMPTOM POSSIBLECAUSES SOLUTION
Enginespeedtoolow? Setenginespeedtocorrect RPM.
Clutchslips? Check orreplaceclutch.
V-belt slips? Adjust orreplaceV-belt.
Excessiveoil invibration? Drainexcess oil and fill toproperlevel.
Travelspeed
toolow,and
vibrationis
weak. Malfunctioninvibrator
housing? Check eccentric,gearsandcounter weights.
Bearing Failure? ReplaceBearing
Insufficientengineoutput? Check engine, compressionetc.
4.7.2Enginetroubleshooting
SYMPTOM POSSIBLECAUSE SOLUTION
Sparkplugbridging? Check gap,insulationorreplace
sparkplug.
Carbondepositonspark
plug? Cleanorreplacesparkplug.
Shortcircuitduetodeficient Checksparkpluginsulation,
replaceifworn.
Difficult tostart, "fuel
isavailable, butno
SPARKat spark
plug".
Impropersparkplug gap? Settopropergap.
ON/OFF switchisshorted? Check switchwiring, replace
switch.
Ignition coil defective? Replaceignitioncoil.
Impropersparkgap,points
dirtry? Setcorrectsparkgapand clean points.
Condenserinsulationwornor
short circuiting? Replacecondenser.
Difficult tostart, "fuel
isavailable, and
SPARKispresent at
sparkplug.
Sparkplugwirebroken or
short circuiting? Replacedefectivesparkplug wiring
Wrongfueltype? Flushfuelsystem,and replace
withcorrect typeoffuel.
Waterordust infuelsystem? Flushfuelsystem.
Difficult tostart, "fuel
isavailable, sparkis
presentand
compression is
normal". Aircleanerdirty? Cleanorreplaceaircleaner.

19
MAINTENANCE
SYMPTOM POSSIBLECAUSE SOLUTION
Suction/exhaust valvestuck
orprotruded?
Re-seat valves.
Pistonringand/orcylinder
worn? Replacepistionringsandor pistion.
Cylinderheadand/orspark
plugnot tightenedproperly? Torquecylinderheadboltsand sparkplug.
Difficult tostart,
"fuelisavailable,
sparkispresent
andcompression is
low. Headgasket and/orspark
pluggasket damaged? Replaceheadand sparkplug gaskets.
Fuelnotavailableinfuel
tank? Fill withcorrecttype offuel.
Fuelcock doesnotopen
properly? Applylubricanttoloosenfuel cock level, replaceif necessary.
Fuelfilterclogged? Replacefuelfilter.
Fueltankcapbreatherhole
cloged? Cleanorreplacefueltankcap.
Nofuelpresentat
carburetor.
Airinfuelline? Bleedfuelline.
Aircleanernot clean? Cleanorreplaceaircleaner.
Improperlevelincarburetor?
Checkfloatadjustment, re-build
carbureator.
"Weakinpower"
compression is
properanddoes
notmistire. DefectiveSparkplug? Cleanorreplacesparkplug.
Waterinfuelsystem? Flushfuelsystem,and replace
withcorrect typeoffuel.
Dirtysparkplug? Cleanorreplacesparkplug.
"Weakinpower"
compression is
properbut mistires.
Ignitiion coil defective? Replaceignitioncoil.
Sparkplugheatvalue
improper? Replacewithcorrecttype of sparkplug.
Correct typeoffuel? Replacewithcorrect typeoffuel.
Engineoverheats.
Coolingfinsdirty? Cleancoolingfins.
Governoradjustedcorrectly? Adjust governor.
Governorspringdefective? Replacegovernorspring.
Rotationalspeed
fluctuates. Fuelflowrestricted? Checkentirefuelsystemfor
leaks orclogs.
Recoil mechanismclogged
withdustanddirt? Clean recoil assemblywithsoap
andwater.
Recoil starter
malfunction. Spiralspringloose? Replacespiralspring.