Toro 23518 - Checking the Spark Plugs; Servicing the Spark Plug

CheckingtheSparkPlugs
ServiceInterval:Every160hours
Removesparkplugs,checkconditionandresetgaps,or
replacewithnewplugs.SeetheEngineOwner'sManual.
ServicingtheSparkPlug
ServiceInterval:Every100hours
TypeforallEngines:NGKBPR4ESorequivalent
AirGap:0.75mm(0.03inch)
Makesuretheairgapbetweenthecenterandsideelectrodes
iscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstallingthespark
plug(s)andagappingtool/feelergaugetocheckandadjust
theairgap.Installanewsparkplug(s)ifnecessary.
RemovingtheSparkPlug
1.Stoptheengine,settheparkingbrake,removethekey,
andwaitforallmovingpartstostopbeforeleavingthe
operatingposition.
2.RemovethesparkplugasshowninFigure40.
Figure40
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).Always
replacethesparkplug(s)whenithasablackcoating,
wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,theengineis
operatingproperly.Ablackcoatingontheinsulatorusually
meanstheaircleanerisdirty.
Setthegapto0.75mm(0.03inch).
G008794
1
2
Figure41
InstallingtheSparkPlug
Tightenthesparkplug(s)to22N-m(16ft-lb).
Figure42
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