Toro 74990 - Checking the Spark Arrester (if Equipped)

CheckingtheSparkPlugs
Important:Nevercleanthesparkplug(s).Always
replacethesparkplug(s)whenithas:ablack
coating,wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeansthattheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
g027479
Figure57
InstallingtheSparkPlugs
Tightenthesparkplugsto24.4to29.8N-m(18to
22ft-lb).
g027735
Figure58
CheckingtheSpark
Arrester(ifequipped)
ServiceInterval:Every50hours
WARNING
Hotexhaustsystemcomponentsmayignite
gasolinevaporsevenaftertheengineis
stopped.Hotparticlesexhaustedduring
engineoperationmayigniteammable
materials.Firemayresultinpersonalinjury
orpropertydamage.
Donotfuelorruntheengineunlessthespark
arresterisinstalled.
1.Stoptheengine,waitforallmovingpartstostop,
andremovethekey.Engagetheparkingbrake.
2.Waitforthemufertocool.
3.Ifanybreaksinthescreenorweldsare
observed,replacethearrester.
4.Ifpluggingofthescreenisobserved,remove
thearresterandshakeanylooseparticlesoutof
thearrester,andcleanthescreenwithawire
brush(soakitinsolventifnecessary).Installthe
sparkarresterontheexhaustoutlet.
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