Toro 74291 - Servicing the Spark Plugs

Figure30
1.Oillter
3.Adapter
2.Adaptergasket
3.Pournewoilinthroughthecenterholeofthelter.
Fillituptothebottomofthethreadsinside.
4.Allowtheltermaterialtoabsorbthenewoilfor
1to2minutes.
5.Applyathincoatofnewoiltotherubbergasketon
thereplacementlter(Figure30).
6.Installthereplacementoilltertothelteradapter,
turntheoillterclockwiseuntiltherubbergasket
contactsthelteradapter,thentightenthelteran
additional2/3to1turn(Figure30).
7.Fillthecrankcasewiththepropertypeofnewoil;
refertoServicingtheEngineOil.
8.Runtheengineforabout3minutes,stoptheengine,
andcheckforoilleaksaroundtheoillter.
9.Checktheengineoillevelandaddoilifneeded.
ServicingtheSparkPlugs
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstallingthe
sparkplugsandagappingtool/feelergaugetocheckand
adjusttheairgap.Installanewsparkplugsifnecessary.
Type:Champion®RC12YC,Champion®Platinum
3071orequivalent
AirGap:0.030inch(0.76mm)
CheckingtheSparkPlugs
ServiceInterval:Every200hours
1.Lookatthecenterofthesparkplugs(Figure31).
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeansthattheaircleanerisdirty.
Figure31
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
Important:Alwaysreplacethesparkplugs
whenithasablackcoating,wornelectrodes,
anoilylm,orcracks.
2.Checkthegapbetweenthecenterandsideelectrodes
(Figure31).Bendthesideelectrode(Figure31)if
thegapisnotcorrect.
RemovingtheSparkPlugs
1.DisengagethePTOandsettheparkingbrake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Disconnectthewiresfromthesparkplugs
(Figure32).
Figure32
1.Spark-plugwire/sparkplug
4.Cleanaroundthesparkplugstopreventdirtfrom
fallingintotheengineandpotentiallycausing
damage.
5.Removethesparkplugsandthemetalwashers.
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