g027478
Figure40
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Note:Ifyouseelightbrownorgrayontheinsulator,
theengineisoperatingproperly.Ablackcoatingon
theinsulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
g027479
Figure41
InstallingtheSparkPlug
Tightenthesparkplugto27N-m(20ft-lb).
g028109
Figure42
CleaningtheBlower
Housing
Every100hours/Yearly(whichevercomesrst)
Toensurepropercooling,makesurethegrassscreen,
coolingns,andotherexternalsurfacesoftheengine
arekeptcleanatalltimes.
Annually,orevery100hoursofoperation(moreoften
underextremelydusty,dirtyconditions),removethe
blowerhousing,andanyothercoolingshrouds.Clean
thecoolingnsandexternalsurfacesasnecessary.
Makesurethecoolingshroudsareinstalled.
Important:Operatingtheenginewithablocked
grassscreen,dirtyorpluggedcoolingns,and/or
coolingshroudsremoved,willcauseengine
damageduetooverheating.
36