fiIgniterdefectivefiBrakedraggingfiClutchslippingfiEngineoverheatingfiEngineoilleveltoohighfiEngineoilviscositytoohighfiIgnitiontimingincorrectfiDrivechaintroublefiIdleadjustingscrewimproperlyadjustedfiPilotjet,needlejetorairpassagecloggedfiAircleanerelementclogged,poorlysealed,ornotfiChokevalveclosedfiCarburetorfuelleveltoohighortoolowfiFueltankcapairventobstructedfiCarburetorholderloosefiAircleanerductloosefiFueltapcloggedfiSparkplugloosefiCylinderheadinsufficientlytightenedfiCylinderorpistonwornfiNovalveclearancefiValvespringbrokenorweakfiValvenotseatingproperly(valvebent,worn,orfiPistonringworn,weak,broken,orstickingfiPistonringsideclearanceexcessivefiCylinderheadgasketdamagedfiCylinderheadwarpedfiCylindergasketdamagedfiDecompressiontroublefiSparkplugdirty,broken,orgapimproperlyad-fiSparkplugcaporhigh-tensionwiringdefectivefiSparkplugcapshortedornotcontactingproperlyfiSparkplugtypeincorrectfiIgniterdefectivefiIgnitioncoildefectivefiCrankshaftsensordefectivefiFlywheelmagnetodefectivefiWiringconnectornotingoodcontact104TROUBLESHOOTINGGUIDEFuel/airmixtureincorrect:Compressionlow:Other:Poorornohigh-speedperformance-Firingincorrect:justedinstalledcarbonaccumulationontheseatingsurface)
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