Toro Pro Force 44553 - Spark Plug Maintenance; Checking and Installing Spark Plugs; Engine Screen and Oil Cooler Cleaning; Cleaning Procedures

ServicingtheSparkPlugs
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplugs.
Useasparkplugwrenchforremovingandinstalling
thesparkplugsandagappingtool/feelergaugeto
checkandadjusttheairgap.Installnewsparksplugs
ifnecessary.
Type:Champion®RC12YC,Champion®Platinum
3071orequivalent
AirGap:0.76mm(0.030inch)
CheckingtheSparkPlugs
ServiceInterval:Every200hours
1.Lookatthecenterofthesparkplugs(Figure27).
Ifyouseelightbrownorgrayontheinsulator,
theengineisoperatingproperly.Ablackcoating
ontheinsulatorusuallymeansthattheair
cleanerisdirty.
g001470
Figure27
1.Centerelectrodeinsulator
3.Airgap—0.75mmor0.030
inch(nottoscale)
2.Sideelectrode
Important:Alwaysreplaceasparkplug
whenithasablackcoating,wornelectrodes,
anoilylm,orcracks.
2.Checkthegapbetweenthecenterandside
electrodes(Figure27).Bendthesideelectrode
ifthegapisnotcorrect.
RemovingtheSparkPlugs
1.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
2.Disconnectthespark-plugwiresfromthespark
plugs(Figure28).
g002358
Figure28
1.Spark-plugwire2.Sparkplug
3.Cleanaroundthesparkplugstopreventdirt
fromfallingintotheengineandpotentially
causingdamage.
4.Removethesparkplugsandthemetalwashers.
InstallingtheSparkPlugs
1.Installthesparkplugsandthemetalwasher.
Ensurethattheairgapissetcorrectly;referto
CheckingtheSparkPlugs(page29).
2.Tightenthesparkplugsto24to30N∙m(18to
22ft-lb).
3.Connectthespark-plugwirestothesparkplugs
(Figure28).
CleaningtheEngineScreen
andtheOilCooler
ServiceInterval:Beforeeachuseordaily
Beforeeachuse,checkandcleantheenginescreen
andoilcooler.Removeanybuildupofgrass,dirtor
otherdebrisfromtheoilcoolerandenginescreen
(Figure29).
g002355
Figure29
1.Enginescreen
2.Oilcooler
29