Toro 74950 - Servicing the Spark Plugs; Removing the Spark Plug; Checking the Spark Plugs

ServicingtheSparkPlugs
ServiceInterval:Every100hours—Checkandgapthe
sparkplugs.
Makesurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.Use
asparkplugwrenchforremovingandinstallingthespark
plug(s)andagappingtool/feelergaugetocheckandadjust
theairgap.Installanewsparkplug(s)ifnecessary.
Type:NGKBPR4ESorequivalent
AirGap:0.76mm(0.030inch)
RemovingtheSparkPlug
1.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
2.DisengagethePTO,movethemotion-controlleversto
theNEUTRAL-LOCKposition,andsettheparkingbrake.
3.Removethelefthydraulic-unitshroudintheorder
listedinFigure51.
Note:Thisgivesyouaccesstothefrontsparkplug.
Figure51
1.Pullthistabouttothe
sideinthedirectionofthe
arrow.
3.Pulltheshroudoffthis
frametabinthedirection
ofthearrow.
2.Pulltheshroudoffthis
frametabinthedirection
ofthearrow.
4.Shroud
4.Removethesparkplug.
G008803
B
A
g027478
Figure52
5.Installthelefthydraulic-unitshroud(Figure51).
CheckingtheSparkPlugs
Important:Donotcleanthesparkplug(s).Always
replacethesparkplug(s)whenithasablackcoating,
wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,theengineis
operatingproperly.Ablackcoatingontheinsulatorusually
meansthattheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
B
A
g027479
Figure53
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