Toro 44539 - Servicing the Spark Plugs

ServicingtheSparkPlugs
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstallingthe
sparkplugsandagappingtool/feelergaugetocheckand
adjusttheairgap.Installanewsparkplugsifnecessary.
Type:Champion®RC12YC,Champion®Platinum
3071orequivalent
AirGap:0.030inch(0.76mm)
CheckingtheSparkPlugs
ServiceInterval:Every200hours
1.Lookatthecenterofthesparkplugs(Figure28).
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeansthattheaircleanerisdirty.
Figure28
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
Important:Alwaysreplacethesparkplugs
whenithasablackcoating,wornelectrodes,an
oilylm,orcracks.
2.Checkthegapbetweenthecenterandsideelectrodes
(
Figure28).Bendthesideelectrode(Figure28)if
thegapisnotcorrect.
RemovingtheSparkPlugs
1.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
2.Disconnectthewiresfromthesparkplugs
(Figure29).
Figure29
1.Spark-plugwire2.Sparkplug
3.Cleanaroundthesparkplugstopreventdirtfrom
fallingintotheengineandpotentiallycausing
damage.
4.Removethesparkplugsandthemetalwashers.
InstallingtheSparkPlugs
1.Installthesparkplugsandthemetalwasher.Ensure
thattheairgapissetcorrectly.
2.Tightenthesparkplugsto18to22ft-lb(24.4to
29.8N⋅m).
3.Connectthewirestothesparkplugs(
Figure28).
ReplacingtheFuelFilter
ServiceInterval:Every500hours
Neverinstalladirtylterifitisremovedfromthefuel
line.
1.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
2.Allowthemachinetocooldown.
3.Squeezetheendsofthehoseclampstogetherand
slidethemawayfromthelter(
Figure30).
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