Toro 74538 - Servicing the Spark Plug

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Figure47
Note:Ensuretheoilltergaskettouchestheengine
andthenanextra3/4turniscompleted.
4.Fillthecrankcasewiththepropertypeofnewoil;
refertoChangingtheOil.
ServicingtheSparkPlug
ServiceInterval:Every100hours
Makesuretheairgapbetweenthecenterandside
electrodesiscorrectbeforeinstallingthesparkplug.
Useasparkplugwrenchforremovingandinstalling
thesparkplug(s)andagappingtool/feelergaugeto
checkandadjusttheairgap.Installanewsparkplug(s)
ifnecessary.
TypeforallEngines:NGK
®
BPR4ESorequivalent
AirGap:0.030inch(0.75mm)
RemovingtheSparkPlug
1.DisengagethePTO,movethemotioncontrollevers
totheneutrallockedpositionandsettheparking
brake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
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Figure48
CheckingtheSparkPlug
Important:Nevercleanthesparkplug(s).Always
replacethesparkplug(s)whenithas:ablack
coating,wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingonthe
insulatorusuallymeanstheaircleanerisdirty.
Setthegapto0.030inches(0.75mm).
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Figure49
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