Toro 74740 - Servicing the Spark Plug

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Figure32
ServicingtheSparkPlug
ServiceInterval:Every200hours—Checkspark
plug(s)conditionandgap.
Every500hours—Replacethesparkplug(s).
ThesparkplugisRFIcompliant.Equivalentalternate
brandplugscanalsobeused.
Type:ChampionXC12YC
AirGap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.Disengagetheblade-controlswitch,movethe
motioncontrolsoutwardtotheparkposition,
stoptheengine,andremovethekey.
2.Beforeremovingthesparkplug(s),cleanthe
areaaroundthebaseoftheplugtokeepdirt
anddebrisoutoftheengine.
3.Removethesparkplug(Figure33).
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Figure33
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Note:Ifyouseelightbrownorgrayontheinsulator,
theengineisoperatingproperly.Ablackcoatingon
theinsulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
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