Toro 37772 - Maintenance; Replacing the Spark Plug

9.Installthebackcoverandreturnthemachinetothe
operatingposition.
ReplacingtheSparkPlug
ServiceInterval:Yearly—Replacethesparkplug.
UseaChampionQC12YCorequivalentsparkplug.
Note:Toaccessthesparkplug,youmustrstremovethe
uppersnowhood(Figure45).
Figure45
1.Chokeknob
3.Ignitionkey
2.Uppersnowhood
4.Screw(2)
1.Removethechokeknobandtheignitionkey(Figure
45).
2.Removethe2screwsthatsecuretheuppersnowhood
tothemachine(Figure45).
3.Slowlyremovetheuppersnowhood,ensuringthat
theprimer-bulbhoseandtheignitionwireremain
connected.
4.Removethebracketthumbscrewandthebracket
(Figure46).
Figure46
1.Spark-plugwire
3.Thumbscrew
2.Bracket
5.Cleanaroundthebaseofthesparkplug(Figure46).
6.Removeanddiscardtheoldsparkplug.
Note:Youwillneedaratchetwrenchextensionto
removethesparkplug.
7.Setthegapbetweentheelectrodesonanewsparkplug
at0.76mm(0.030inch)asshowninFigure47.
Figure47
1.0.76mm(0.030inch)
8.Installthenewsparkplug,tightenitrmly,andattach
theignitionwiretothesparkplug.
9.Installthebracketwiththethumbscrewthatyou
removedinstep4.
10.Ensurethattheprimer-bulbhoseandtheignitionwire
areconnectedandclearofthecarburetorbracket.
11.Securetheuppersnowhoodtothemachinewiththe2
screwsthatyoupreviouslyremoved.
12.Alignthetabonthechoke-controlknobwiththeslot
ontheuppersnowhood.
13.Connectthechoke-controlknobtothechokeshafton
thecarburetor.
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