Toro 77285 - Servicing the Spark Plug; Spark Plug Checks and Installation

g373565
Figure71
7.Starttheengineanddrivetoaatarea.
8.Checktheoillevelagain.
ServicingtheSparkPlug
ServiceInterval:Every100hoursoryearly,
whichevercomesrst
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstalling
thesparkplug(s)andagappingtool/feelergaugeto
checkandadjusttheairgap.Installanewspark
plug(s)ifnecessary.
Type:BriggsandStratton®491055
Airgap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.Parkthemachineonalevelsurface,disengage
thePTO,andengagetheparkingbrake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.RemovethesparkplugasshowninFigure72.
g027478
Figure72
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithasa
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.75mm(0.03inch).
g027479
Figure73
InstallingtheSparkPlug
g027480
Figure74
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