Toro 74656 - Servicing the Spark Plug

ChangingtheEngine-OilFilter
ServiceInterval:Every200hours—Changetheoillter
(moreoftenindusty,dirtyconditions).
Note:Changetheengine-oilltermorefrequentlywhen
operatingconditionsareextremelydustyorsandy.
1.Draintheoilfromtheengine;refertoChangingthe
EngineOil(page36).
2.Changetheengineoillter(Figure42).
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A
C D
E
F
3/4
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Figure42
Note:Ensurethattheoil-ltergaskettouchesthe
engineandthenanextra3/4turniscompleted.
3.Fillthecrankcasewiththepropertypeofnewoil;refer
toChangingtheEngineOil(page36).
ServicingtheSparkPlug
ServiceInterval:Every100hours—Checkthesparkplug(s).
Makesuretheairgapbetweenthecenterandsideelectrodes
iscorrectbeforeinstallingthesparkplug.Useaspark-plug
wrenchforremovingandinstallingthesparkplug(s)anda
gappingtool/feelergaugetocheckandadjusttheairgap.
Installanewsparkplug(s)ifnecessary.
Type:NGKBPR4ES(orequivalent)
AirGap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.Disengagetheblade-controlswitch(PTO).
2.Stoptheengine,waitforallmovingpartstostop,and
removethekeybeforeleavingtheoperatingposition.
3.Removethesparkplug(Figure44).
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Figure43
CheckingtheSparkPlug
Important:Donotcleanthesparkplug.Always
replacethesparkplugwhenithasablackcoating,worn
electrodes,anoilylm,orcracks.
Note:Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingontheinsulator
usuallymeansthattheaircleanerisdirty.
Setthegapto0.76mm(0.030).
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A
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Figure44
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