Toro 74492 - Spark Plug Maintenance; Spark Plug Servicing

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Figure48
Note:Ensurethattheoil-ltergaskettouches
theengine,andthenturntheoillteranextra
3/4turn.
3.Fillthecrankcasewiththepropertypeofnew
oil;refertoEngine-OilSpecications(page42).
ServicingtheSparkPlug(s)
ServiceInterval:Every100hours
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstalling
thesparkplugandagappingtoolorfeelergaugeto
checkandadjusttheairgap.Installanewsparkplug
ifnecessary.
TypeofSparkPlug:NGK
®
BPR4ESorequivalent
AirGap:0.75mm(0.03inch)
RemovingtheSparkPlug(s)
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch(PTO),andengagethe
parkingbrake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Cleantheareaaroundthebaseoftheplugto
keepdirtanddebrisoutoftheengine.
4.Locateandremovethesparkplug(s)asshown
inFigure49.
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Figure49
CheckingtheSparkPlug(s)
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithasa
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.75mm(0.03inch).
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