Toro 74687 - Servicing the Spark Plug; Cleaning the Cooling System

ServicingtheSparkPlug
ServiceInterval:Every100hoursoryearly,
whichevercomesrst—Checkthe
sparkplug(s).
Every200hours/Every2years(whichever
comesrst)—Replacethesparkplug(s).
Ensurethattheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstalling
thesparkplugandagappingtoolorfeelergaugeto
checkandadjusttheairgap.Installanewsparkplug
ifnecessary.
Type:Champion
®
RN9YCorNGK
®
BPR6ES
Airgap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch,andmovethe
motion-controlleversoutwardtothePARK
position.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.Allowtheenginetocool.
3.Cleantheareaaroundthebaseoftheplugto
keepdirtanddebrisoutoftheengine.
4.Removethesparkplug(Figure46).
g027478
Figure46
CheckingtheSparkPlug
Important:Donotcleanthesparkplug(s).
Alwaysreplacethesparkplug(s)whenithasa
blackcoating,wornelectrodes,anoilylm,or
cracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.75mm(0.03inch).
g206628
Figure47
InstallingtheSparkPlug
g027960
Figure48
CleaningtheCooling
System
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch,andmovethe
motion-controlleversoutwardtothePARK
position.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Removetheairlterfromtheengine.
4.Removetheengineshroud.
5.Topreventdebrisenteringtheairintake,install
theairltertothelterbase.
6.Cleandebrisandgrassfromtheparts.
7.Removetheairlterandinstalltheengine
shroud.
8.Installtheairlter.
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