Use and Care Manual

B
A
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Figure34
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).Always
replacethesparkplug(s)whenithas:ablackcoating,
wornelectrodes,anoilylm,orcracks.
Note:Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingontheinsulator
usuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
B
A
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Figure35
InstallingtheSparkPlug
Tightenthesparkplugto25to29N∙m(18to22ft-lb).
Figure36
CleaningtheBlowerHousing
Toensurepropercooling,makesurethatthegrassscreen,
coolingns,andotherexternalsurfacesoftheengineare
keptcleanatalltimes.
Annually,orevery100hoursofoperation(moreoftenunder
extremelydusty,dirtyconditions),removetheblowerhousing
andanyothercoolingshrouds.Cleanthecoolingnsand
externalsurfacesasnecessary.Makesurethatthecooling
shroudsareinstalled.Torquetheblowerhousingscrewsto
7.5N·m(5.5ft-lb).
Important:Operatingtheenginewithablocked
grassscreen,dirtyorpluggedcoolingns,and/or
coolingshroudsremoved,causesenginedamagedue
tooverheating.
30