Toro 74997 - Checking the Spark Arrester

CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).Always
replacethesparkplug(s)whenithas:ablackcoating,
wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,theengineis
operatingproperly.Ablackcoatingontheinsulatorusually
meanstheaircleanerisdirty.
Setthegapto0.75mm(0.03inch).
B
A
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Figure58
InstallingtheSparkPlug
Tightenthesparkplug(s)to22N∙m(16ft-lb).
Figure59
CheckingtheSparkArrester
ForaModelwithaSparkArrester
ServiceInterval:Every50hours
WARNING
Hotexhaustsystemcomponentsmayignite
gasolinevaporsevenafteryoushutofftheengine.
Hotparticlesexhaustedduringengineoperation
mayigniteammablematerials.Firemayresultin
personalinjuryorpropertydamage.
Donotrefuelorruntheengineunlessaspark
arresterisinstalled.
1.Shutofftheengine,waitforallmovingpartstostop,
andremovekey.Engageparkingbrake.
2.Waitforthemufertocool.
3.Ifthereareanybreaksinthescreenorwelds,replace
thearrester.
4.Ifthescreenisplugged,removethearresterand
shakethelooseparticlesoutofthearresterandclean
thescreenwithawirebrush(soakitinsolventif
necessary).Installthearresterontheexhaustoutlet.
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