Toro 41179 - Changing the Spark Plugs

6.Fillthecrankcasewiththecorrecttypeofnewoil;
refertoChangingtheEngineOil,steps8through10.
7.Disposeoftheusedoillteratacertiedrecycling
center.
ChangingtheSparkPlugs
ServiceInterval:Every200hours
Type:ChampionRC-12YC(orequivalent)
AirGap:0.030inch(0.76mm)
Makesuretheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplugs.
Useasparkplugwrenchforremovingandinstallingthe
sparkplugsandagappingtool/feelergaugetocheck
andadjusttheairgap.
RemovingtheSparkPlug
1.Settheparkingbrake,stopthepump,stopthe
engine,andremovetheignitionkey.
2.Releasethelatchonthebackoftheseatandliftthe
seatforward.
3.Pullthewiresoffthesparkplugs(Figure49).
4.Cleanaroundthesparkplugstopreventdirtfrom
fallingintotheengineandpotentiallycausing
damage.
5.Removethesparkplugsandmetalwashers.
Figure49
1.Sparkplugwire2.Sparkplug
CheckingtheSparkPlugs
1.Lookatthecenterofthesparkplugs(Figure50).
Ifyouseealightbrownorgraycoatingonthe
insulator,theengineisoperatingproperly.Ablack
coatingontheinsulatorusuallymeanstheaircleaner
isdirty.
Important:Donotcleanthesparkplugs.
Alwaysreplaceasparkplugwhenithasablack
coating,wornelectrodes,anoilylm,orcracks.
2.Checkthegapbetweenthecenterandsideelectrodes
(Figure50)andbendthesideelectrode,ifthegap
isnotcorrect.
Figure50
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
InstallingtheSparkPlugs
1.Installthesparkplugsandmetalwashers.
2.Tightenthesparkplugsto18to22ft-lb(24.4to
29.8N-m).
3.Pushthewiresontothesparkplugs(Figure49).
4.Closeandlatchtheseat.
44