Toro 74657 - Servicing the Spark Plug

g027660
Figure41
ServicingtheSparkPlug
ServiceInterval:Every100hours/Yearly(whichever
comesrst)—Checkthespark
plug(s).
Every200hours/Every2years(whichever
comesrst)—Replacethesparkplug(s).
Makesurethattheairgapbetweenthecenterand
sideelectrodesiscorrectbeforeinstallingthespark
plug.Useaspark-plugwrenchforremovingand
installingthesparkplug(s)andagappingtool/feeler
gaugetocheckandadjusttheairgap.Installanew
sparkplug(s)ifnecessary.
Type:Champion
®
RN9YCorNGK
®
BPR6ES
Airgap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.DisengagethePTOandensurethattheparking
brakeisengaged.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
g008791
Figure42
Note:Duetothedeeprecessaroundthespark
plug,blowingoutthecavitywithcompressedair
isthemosteffectivemethodforcleaning.The
sparkplugismostaccessiblewhentheblower
housingisremovedforcleaning.
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
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