Toro STX-38 EFI - Servicing the Spark Plug(s); Checking the Spark Plug(s); Installing the Spark Plug(s)

ServicingtheSparkPlug(s)
ServiceInterval:Every500hours/Yearly(whichever
comesrst)
Makesurethattheairgapbetweenthecenterand
sideelectrodesiscorrectbeforeinstallingthespark
plug.Useasparkplugwrenchforremovingand
installingthesparkplug(s)andagappingtool/feeler
gaugetocheckandadjusttheairgap.Installnew
sparkplug(s)ifnecessary.
Type:Champion
®
XC10YCorequivalent
AirGap:0.76mm(0.030inch)
RemovingtheSparkPlug(s)
1.Parkthemachineonalevelsurface,engage
theparkingbrake(ifapplicable),andlowerthe
grinder.
2.Shutofftheengineandremovethekey.
3.Locateandremovethesparkplug(s)asshown
inFigure36.
g319423
g027478
Figure36
CheckingtheSparkPlug(s)
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.75mm(0.03inch).
g206628
Figure37
InstallingtheSparkPlug(s)
g028109
Figure38
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