Toro 74855 - Servicing the Spark Plug

ChangingtheEngineOilFilter
ServiceInterval:Every200hours—Changetheoillter.
(moreoftenindusty,dirtyconditions)
Note:Changetheengineoilltermorefrequentlywhen
operatingconditionsareextremelydustyorsandy.
1.Draintheoilfromtheengine;refertoChangingthe
EngineOil(page30).
2.Changetheengineoillter(
Figure34).
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G0201 18
Figure34
Note:Ensuretheoilltergaskettouchestheengine
andthenanextra3/4turniscompleted.
3.Fillthecrankcasewiththepropertypeofnewoil;refer
toChangingtheEngineOil(page30).
ServicingtheSparkPlug
ServiceInterval:Every100hours—Checkthesparkplug(s).
Makesuretheairgapbetweenthecenterandsideelectrodes
iscorrectbeforeinstallingthesparkplug.Useaspark-plug
wrenchforremovingandinstallingthesparkplug(s)anda
gappingtool/feelergaugetocheckandadjusttheairgap.
Installanewsparkplug(s)ifnecessary.
Type:NGKBPR4ES(orequivalent)
AirGap:0.76mm(0.030inch)
RemovingtheSparkPlug
1.DisengagethePTO,movethemotioncontrolleversto
theneutrallockedpositionandsettheparkingbrake.
2.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
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G020130
Figure35
Note:Blowingoutthecavitywithcompressedairis
usuallythemosteffectivemethodforcleaning.The
sparkplugismostaccessiblewhentheblowerhousing
isremovedforcleaning.
CheckingtheSparkPlug
Important:Nevercleanthesparkplug(s).Always
replacethesparkplug(s)whenithasablackcoating,
wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,theengineis
operatingproperly.Ablackcoatingontheinsulatorusually
meanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
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G020131
Figure36
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