Operator's Manual

14.Installthellcap.
ServicingtheSparkPlugs
ServiceInterval:Every200hours—Checkthespark
plugs.
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingeachsparkplug.
Useaspark-plugwrenchforremovingandinstalling
thesparkplugsandagappingtool/feelergaugeto
checkandadjusttheairgap.Installnewsparkplugs
ifnecessary.
Type:ChampionRC12YCorequivalent.AirGap:
0.75mm(0.03inch)
RemovingtheSparkPlugs
1.Shutofftheengine,engagetheparkingbrake,
andremovethekey.
2.Pullthewiresoffthesparkplugs(Figure50).
g004207
Figure50
1.Spark-plugwire2.Sparkplug
3.Cleanaroundthesparkplugs.
4.Removebothsparkplugsandmetalwashers.
CheckingtheSparkPlugs
1.Lookatthecenterofbothsparkplugs(Figure
51).Ifyouseelightbrownorgrayonthe
insulator,theengineisoperatingproperly.A
blackcoatingontheinsulatorusuallymeansthe
aircleanerisdirty.
Important:Nevercleanthesparkplugs.
Alwaysreplacethesparkplugswhenthey
haveablackcoating,wornelectrodes,an
oilylm,orcracks.
g004219
Figure51
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
2.Checkthegapbetweenthecenterandside
electrodes(Figure51).
3.Bendthesideelectrode(Figure51)ifthegap
isnotcorrect.
InstallingtheSparkPlugs
1.Threadthesparkplugsintothesparkplugholes.
2.Tightenthesparkplugsto27N∙m(20ft-lb).
3.Pushthewiresontothesparkplugs(Figure50).
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