Toro 74253CP - Page 35

RemovingtheSparkPlug
1.DisengagethePTO,movethemotioncontrollevers
totheneutrallockedpositionandsettheparking
brake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Pullthewire(s)offthesparkplug(s)(Figure43).
Nowcleanaroundthesparkplug(s)topreventdirt
fromfallingintotheengineandpotentiallycausing
damage.
4.Removethesparkplug(s)andmetalwasher.
Figure43
1.Sparkplugwire2.Sparkplug
CheckingtheSparkPlug
ServiceInterval:Every100hours
1.Lookatthecenterofthesparkplug(s)(Figure44).
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Important:Nevercleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Figure44
1.Canterelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
2.Checkthegapbetweenthecenterandsideelectrodes
(Figure44).Bendthesideelectrode(Figure44)if
thegapisnotcorrect.
InstallingtheSparkPlug
1.Installthesparkplug(s).Makesuretheairgapisset
correctly.
2.Tightenthesparkplug(s)to16ft.-lb(22N⋅m).
3.Pushthewire(s)ontothesparkplug(s)(Figure43).
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