Exmark QSS708GEM42200 - Page 47

Maintenance
Every500hours—Replace
thesparkplug(Kohler
engine).
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstalling
thesparkplugandagappingtoolorfeelergaugeto
checkandadjusttheairgap.Installanewsparkplug
ifnecessary.
ThesparkplugisRFIcompliant.Equivalentalternate
brandplugscanalsobeused.
Type:ChampionXC12YCorequivalent
AirGap:0.030inch(.76mm)
RemovingtheSparkPlug–Kohler
engine
1.DisengagethePTOandensuretheparkingbrake
isengaged.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Disconnectthewirefromthesparkplug.
B
A
g027478
Figure45
4.Cleanaroundthesparkplugtopreventdirtfrom
fallingintotheengineandpotentiallycausing
damage.
5.Removethesparkplugandmetalwasher.
CheckingtheSparkPlug–Kohler
Engine
1.Inspectthesparkplug
Note:Ifyouseelightbrownorgrayonthe
insulator,theengineisoperatingproperly.A
blackcoatingontheinsulatorusuallymeansthe
aircleanerisdirty.
Important:DoNotcleanthesparkplug.
Alwaysreplacethesparkplugwhenithasa
blackcoating,wornelectrodes,anoilylm,
orcracks.
B
A
g027479
Figure46
1.Centerelectrode
insulator
3.Airgap(nottoscale)
2.Sideelectrode
2.Checkthegapbetweenthecenterandside
electrodes.
3.Setthegapto0.030inch(.76mm).
InstallingtheSparkPlug–Kohler
Engine
1.Installthesparkplug.Makesurethattheairgap
issetcorrectly.
2.Tightenthesparkplugto18to22ft-lb(25to29
N-m).
Figure47
3.Pushthewireontothesparkplug.
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