Toro XLS 420T - Fuel System Maintenance; Replacing the Fuel Filter

usuallythemosteffectivemethodforcleaning.The
sparkplugsaremostaccessiblewhentheblower
housingisremovedforcleaning.
7.Removethesparkplugs.
CheckingtheSparkPlugs
1.Inspectthesparkplugs(Figure22).
Note:Ifyouseelightbrownorgrayonthe
insulator,theengineisoperatingproperly.Ablack
coatingontheinsulatorusuallymeansthattheair
cleanerisdirty.
Figure22
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
Important:Donotcleanthesparkplugs.
Alwaysreplaceasparkplugwhenithasablack
coating,wornelectrodes,anoilylm,orcracks.
2.Checkthegapbetweenthecenterandsideelectrodes
(
Figure22).Bendthesideelectrodeifthegapisnot
correct.
InstallingtheSparkPlugs
1.Installthesparkplugs.
Note:Ensurethattheairgapofeachsparkplug
issetcorrectly.
2.Tightenthesparkplugsto16ft-lb(22N-m).
3.Connectthewiretoeachsparkplug.
4.Installtheshieldoverthesparkplugs.
5.Closethehood.
FuelSystem
Maintenance
ReplacingtheFuelFilter
ServiceInterval:Every100hours—Replacethefuel
lter.
Important:Donotinstalladirtylterifitis
removedfromthefuelline.
1.Parkthemachineonalevelsurfaceanddisengage
thebladecontrol(PTO).
2.Stoptheengine,waitforallmovingpartstostop,and
removethekeybeforeleavingtheoperatingposition.
3.Raisethehoodandlocatethefuellterbetweenthe
fueltankandtheengine(
Figure23).
Figure23
1.Fuellinefromfueltank
4.Fuellinetoengine
2.Hoseclamp5.Flowdirectionarrow
3.Fuellter
4.Squeezetheendsofthehoseclampstogetherand
slidethemawayfromthelter(Figure23).
5.Removethelterfromthefuellines.
22