Toro 74909TE - Servicing the Spark Plug

ServicingtheSparkPlug
ServiceInterval:Every100hours
Makesuretheairgapbetweenthecenterandsideelectrodes
iscorrectbeforeinstallingthesparkplug.Useasparkplug
wrenchforremovingandinstallingthesparkplug(s)anda
gappingtool/feelergaugetocheckandadjusttheairgap.
Installanewsparkplug(s)ifnecessary.
TypeofSparkPlug:NGK
®
BPR4ESorequivalent
AirGap:0.76mm(0.030inch)
RemovingtheSparkPlugs
Important:Thefastenersonthecoversofthismachine
aredesignedtoremainonthecoverafterremoval.
Loosenallofthefastenersoneachcoverafewturns
sothatthecoverisloosebutstillattached,thengo
backandloosenthemuntilthecovercomesfree.This
preventsyoufromaccidentallystrippingtheboltsfree
oftheretainers.
1.Shutofftheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
2.Disengagetheblade-controlswitch(PTO),movethe
motion-controlleverstotheNEUTRAL-LOCKposition,
andsettheparkingbrake.
3.Removethehydraulic-unitshroudbyremovingthe2
nutsshowninFigure60.
Note:Thisgivesyouaccesstothefrontsparkplug.
1
g035172
Figure60
1.Removethese2nuts
4.Removethesparkplugs.
g035393
B
A
g027478
Figure61
5.Installtheleft-handhydraulic-unitshroud(Figure60).
CheckingtheSparkPlug
Important:Nevercleanthesparkplug(s).Always
replacethesparkplug(s)whenithas:ablackcoating,
wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,theengineis
operatingproperly.Ablackcoatingontheinsulatorusually
meanstheaircleanerisdirty.
Setthegapto0.76mm(0.030inches).
B
A
g027479
Figure62
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