Exmark QUEST E Series - Spark Plug and Blower Housing Maintenance

Maintenance
RemovingtheSparkPlug
1.Parkmachineonlevelground,disengagetheblade
controlswitch,engagetheparkingbrake,stop
engine,andremovekey.Waitforallmovingparts
tostopbeforeleavingtheoperator’sposition.
2.Disconnectthewirefromthesparkplug.
g027478
Figure50
Duetothedeeprecessaroundthesparkplug,
blowingoutthecavitywithcompressedairis
usuallythemosteffectivemethodforcleaning.
Thesparkplugismostaccessiblewhentheblower
housingisremovedforcleaning.
InstallingtheSparkPlug
1.Installthesparkplug.Makesurethattheairgap
issetcorrectly.
2.Tightenthesparkplugto18to22ft-lb(25to29
N-m).
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Figure51
CheckingtheSparkPlug
1.Inspectthesparkplug
Note:Ifyouseelightbrownorgrayonthe
insulator,theengineisoperatingproperly.A
blackcoatingontheinsulatorusuallymeansthe
aircleanerisdirty.
Important:DoNotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:
ablackcoating,wornelectrodes,anoilylm,
orcracks.
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Figure52
1.Centerelectrode
insulator
3.Airgap(nottoscale)
2.Sideelectrode
2.Checkthegapbetweenthecenterandside
electrodes.
3.Setthegapto0.030inch(.76mm).
CleaningtheBlowerHousing
ServiceInterval:Every100hours/Yearly
(whichevercomesrst)
Moreoftenunderdirty
conditions.
Toensurepropercooling,makesurethegrassscreen,
coolingns,andotherexternalsurfacesoftheengine
arekeptcleanatalltimes.
1.Removetheblowerhousingandanyothercooling
shrouds.
2.Cleanthecoolingnsandexternalsurfacesas
necessary.
3.Makesurethecoolingshroudsarereinstalled
Important:Operatingtheenginewithablocked
grassscreen,dirtyorpluggedcoolingns,
and/orcoolingshroudsremoved,willcause
enginedamageduetooverheating.
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