Toro TITAN ZX 4800 - Spark Plug and Cooling System

B
A
C D
E
F
3/4
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Figure47
Note:Ensuretheoilltergaskettouchestheengine
andthenanextra3/4turniscompleted.
3.Fillthecrankcasewiththepropertypeofnewoil.
ServicingtheSparkPlug
ServiceInterval:Every100hours—Checkthesparkplug(s).
Makesuretheairgapbetweenthecenterandsideelectrodes
iscorrectbeforeinstallingthesparkplug.Useasparkplug
wrenchforremovingandinstallingthesparkplug(s)anda
gappingtool/feelergaugetocheckandadjusttheairgap.
Installanewsparkplug(s)ifnecessary.
Type:NGKBPR4ES
AirGap:0.76mm(0.03inch)
RemovingtheSparkPlug
1.DisengagethePTO,movethemotion-controllevers
totheNEUTRAL-LOCKposition,andsettheparking
brake.
2.Shutofftheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Removethesparkplug(Figure48).
B
A
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Figure48
CheckingtheSparkPlug
Important:Nevercleanthesparkplug(s).Always
replacethesparkplug(s)whenithas:ablackcoating,
wornelectrodes,anoilylm,orcracks.
Ifyouseelightbrownorgrayontheinsulator,theengineis
operatingproperly.Ablackcoatingontheinsulatorusually
meanstheaircleanerisdirty.
Setthegapto0.03inches(0.76mm).
B
A
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Figure49
InstallingtheSparkPlug
Tightenthesparkplug(s)to22N•m(16ft-lb)asshownin
Figure50.
B
A
16 ft-lb
22 N-m
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C
D
Figure50
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