Toro 72904 - Servicing the Spark Plug(S)

ServicingtheSparkPlug(s)
ServiceInterval:Every200hours—Checkthespark
plug(s).
Every500hours—Replacethesparkplug(s).
Type:ChampionXC12YC
AirGap:0.76mm(0.03inch)
RemovingtheSparkPlug(s)
1.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
2.DisengagethePTO,movethemotion-control
leverstotheNEUTRAL-LOCKposition,and
engagetheparkingbrake.
3.Removethelefthydraulic-unitshroudinthe
orderlistedwithFigure59.Thisgivesyou
accesstothefrontsparkplug.
g009922
g009919
Figure59
1.Pullthistabouttothe
sideinthedirectionofthe
arrow
3.Pulltheshroudoffthis
frametabinthedirection
ofthearrow
2.Pulltheshroudoffthis
frametabinthedirection
ofthearrow
4.Shroud
4.Removethesparkplug.
g008803
g027478
Figure60
CheckingtheSparkPlug(s)
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithasa
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.03inch).
g206628
Figure61
InstallingtheSparkPlug(s)
1.Installthesparkplug(s)asshowninFigure62.
2.Installthehydraulicshroud(Figure59).
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