RemovingtheSparkPlug
1.DisengagethePTOandengagetheparking
brake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
g027478
Figure70
Note:Duetothedeeprecessaroundthespark
plug,blowingoutthecavitywithcompressedair
isusuallythemosteffectivemethodforcleaning.
Thesparkplugismostaccessiblewhenthe
blowerhousingisremovedforcleaning.
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithas:a
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inch).
g027479
Figure71
InstallingtheSparkPlug
Tightenthesparkplug(s)to25to30N∙m(19to22
ft-lb).
g027735
Figure72
CleaningtheCoolingSystem
Cleantheair-intakescreenfromgrassanddebris
beforeeachuse.
1.Disengagetheblade-controlswitchandengage
theparkingbrake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Removetheairlterfromtheengine.
4.Removetheengineshroud.
5.Topreventdebrisenteringtheairintake,install
theairltertothelterbase.
6.Cleandebrisandgrassfromtheparts.
7.Removetheairlterandinstalltheengine
shroud.
8.Installtheairlter.
54