Toro 74722 - Cleaning the Cooling System

RemovingtheSparkPlug
1.Disengagetheblade-controlswitch(PTO).
2.Stoptheengine,waitforallmovingpartstostop,and
removethekeybeforeleavingtheoperatingposition.
3.Removethesparkplug(Figure35).
B
A
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Figure34
CheckingtheSparkPlug
Important:Donotcleanthesparkplug.Always
replacethesparkplugwhenithasablackcoating,worn
electrodes,anoilylm,orcracks.
Note:Ifyouseelightbrownorgrayontheinsulator,the
engineisoperatingproperly.Ablackcoatingontheinsulator
usuallymeansthattheaircleanerisdirty.
Setthegapto0.76mm(0.030).
B
A
g027479
Figure35
InstallingtheSparkPlug
Tightenthesparkplugto22N-m(16ft-lb).
B
A
16 ft-lb
22 N-m
g027661
C
D
Figure36
CleaningtheCoolingSystem
Cleantheair-intakescreenfromgrassanddebrisbeforeeach
use.
1.Disengagetheblade-controlswitch,movethecontrol
leverstotheneutral-lockedposition,andapplythe
parkingbrake.
2.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
3.Removetheair-intakescreen,theair-cleanercover,and
thefanhousing.
4.Cleandebrisandgrassfromtheparts.
5.Installtheair-intakescreen,air-cleanercover,andthe
fanhousing.
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