Toro 74391 User Manual

G005177
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1
3
Figure30
1.Oillter
3.Adapter
2.Gasket
15.Slowlypourapproximately80%ofthespeciedoil
intothellertube(Figure27).
16.Installtheoilllcap/dipstickandpushrmlyinto
place(Figure27).
17.Checktheoillevel(Figure27);refertoChecking
theOilLevel.
18.Slowlyaddadditionaloiltobringittothefullmark.
19.Installtheoilllcap/dipstickandpushrmlyinto
place(Figure27).
ServicingtheSparkPlug
ServiceInterval:Every200hours—Checksparkplug
conditionandgap.
Every500hours—Replacethespark
plug.
ThesparkplugisRFIcompliant.Equivalentalternate
brandplugscanalsobeused.Sparkplugreplacementis
recommendedat500hours.
Type:ChampionXC12YC(orequivalent)
AirGap:0.030inch(0.76mm)
RemovingtheSparkPlug
1.Disengagethebladecontrolswitch,movethe
motioncontrolsoutwardtotheparkposition,stop
theengine,andremovethekey.
2.Pullthewireoffofthesparkplug(Figure31).Clean
aroundthesparkplugtopreventdirtfromfalling
intotheengineandpotentiallycausingdamage.
Note:Duetothedeeprecessaroundthespark
plug,blowingoutthecavitywithcompressedair
isusuallythemosteffectivemethodforcleaning.
Thesparkplugismostaccessiblewhentheblower
housingisremovedforcleaning.
3.Removethesparkplugandmetalwasher.
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Figure31
1.Sparkplugandwirelocation
CheckingtheSparkPlug
1.Lookatthecenterofthesparkplug(Figure32).
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Important:Nevercleanthesparkplug.Always
replacethesparkplugwhenithasablack
coating,wornelectrodes,anoilylm,orcracks.
2.Checkthegapbetweenthecenterandsideelectrodes
(Figure32).Bendthesideelectrode(Figure32)if
thegapisnotcorrect.
Figure32
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
InstallingtheSparkPlug
1.Installthesparkplug.Makesurethattheairgapis
setcorrectly.
2.Tightenthesparkplugto30ft-lb(41N-m).
3.Pushthewireontothesparkplug(Figure31).
CleaningtheBlowerHousing
Toensurepropercooling,makesurethegrassscreen,
coolingns,andotherexternalsurfacesoftheengine
arekeptcleanatalltimes.
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Toro 74391 Specifications

General

Brand	Toro
Model	74391
Category	Lawn Mower
Language	English