Toro 74923 - Checking the Spark Arrester

5.Installthelefthydraulic-unitshroud(Figure53).
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.03inch).
g027479
Figure55
InstallingtheSparkPlug
Tightenthesparkplug(s)to24.4to29.8N∙m(18to
22ft-lb).
g027735
Figure56
CheckingtheSpark
Arrester
ForModelswithaSparkArrester
ServiceInterval:Every50hours
WARNING
Hotexhaustsystemcomponentsmayignite
fuelvaporsevenafteryoushutofftheengine.
Hotparticlesexhaustedduringengine
operationmayigniteammablematerials.
Firemayresultinpersonalinjuryorproperty
damage.
Donotfuelorruntheengineunlessaspark
arresterisinstalled.
1.Shutofftheengine,waitforallmovingpartsto
stop,removethekey,andengagetheparking
brake.
2.Waitforthemufertocool.
3.Ifthereareanybreaksinthescreenorwelds
areobserved,replacethearrester.
4.Ifthescreenisplugged,removethearrester
andshakelooseparticlesoutofthearrester,
andcleanthescreenwithawirebrush(soakin
solventifnecessary).
5.Installthearresterontheexhaustoutlet.
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