Toro TimeCutter SS 4200 74720 - Installing the Spark Plug; Checking the Spark Plug

B
A
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Figure33
1.Spark-plugwire
4.Cleanaroundthesparkplugtopreventdirtfromfalling
intotheengineandpotentiallycausingdamage.
5.Removethesparkplugandmetalwasher.
CheckingtheSparkPlug
1.Inspectthesparkplug(Figure34).
Note:Ifyouseelightbrownorgrayontheinsulator,
theengineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeansthattheaircleanerisdirty.
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Figure34
1.Centerelectrodeinsulator3.Airgap(nottoscale)
2.Sideelectrode
Important:Donotcleanthesparkplug.Always
replacethesparkplugwhenithasablackcoating,
wornelectrodes,anoilylm,orcracks.
2.Checkthegapbetweenthecenterandsideelectrodes
(Figure34).Bendthesideelectrodeifthegapisnot
correct.
InstallingtheSparkPlug
Tightenthesparkplugto20N-m(15ft-lb).
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A
15 ft-lb
20 N-m
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C
D
Figure35
ServicingtheSparkPlug
ServiceInterval:Every50hours—Checkthesparkplug.
Every100hours—Replacethesparkplug.
Ensurethattheairgapbetweenthecenterandsideelectrodes
iscorrectbeforeinstallingthesparkplug.Useasparkplug
wrenchforremovingandinstallingthesparkpluganda
gappingtoolorfeelergaugetocheckandadjusttheairgap.
Installanewsparkplugifnecessary.
Type:ChampionRC12YC,Autolite3924,NGKBCPR6ES
orequivalent
AirGap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.Disengagetheblade-controlswitch,movethemotion
controlsoutwardtotheparkposition,stoptheengine,
andremovethekey.
2.Beforeremovingthesparkplug(s),cleanthearea
aroundthebaseoftheplugtokeepdirtanddebrisout
oftheengine.
3.Removethesparkplug(Figure36).
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