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.
Measurethe pluggapwith a feelergauge.Correctas necessary
by bendingthe side electrode,Figure19.The gapshouldbeset
to .02-.03inches(0.60-0.80ram).
Electrode
.02-.03in.
(0.60-0.80ram)
Figure19
4. Checkthat thespark plug washeris in good conditionandthread
the sparkplugin by handto preventcross-threading.
5. Afterthe sparkplug is seated,tightenwith a sparkplugwrenchto
compressthe washer.
NOTE:Wheninstallinga newsparkplug,tighten1/2-turnafterthe spark
plugseatsto compressthe washer.Whenreinstallingausedsparkplug,
tighten1/8-to 1/4-turnafterthe sparkplugseatsto compressthe washer.
Thesparkplugmustbetightenedsecurely.A loosesparkplug can
becomeveryhotand can damagethe engine.
Cleaning the Engine
Ifthe enginehasbeenrunning,allowit to cool for at leasthalfan hour
beforecleaning.Periodicallyremovedirt build-upfromengine.Before
servicingthe engine,removethecarburetorcover and/orblower
housing.Cleandirt and debrisfrom thefollowingareas:
• CoolingFins
• AirIntakeScreenor RecoilStarter/FlywheelGuardAreas
• SparkPlugConnection
• Levers
• LinkageArea
• Guards
• Carburetor
• EngineHead
Removingdebriswillinsureadequatecooling,correctengine speed
and reducethe risk of fire.
Donotspraytheenginewithwatertocleanit becausethewatercould
contaminatethe fuel.Usingagardenhoseor pressurewashingequip-
mentcan alsoforcewaterintothe muffleropening.Waterthatpasses
throughthemufflercanentertheenginecylinderandcausedamage.
Accumulationof debrisaroundthe mufflercouldcausea fire.Inspect
andclean beforeevery_use.
LUBRICATION
Lubricatethe pivotpointson thecontrolhandleand the extension
springat the endof the controlcablewitha light oilonceeveryseason
and beforethe snowthroweris put intostorageat the endof the
season.
ADJUSTMENTS
Shave Plate
Tocheckthe adjustmentof the shaveplate,placethe machineon a
level surface.Thewheels,shaveplateandaugerpaddlesshouldall
contactthe levelsurface.Notethat if the shaveplateis adjustedtoo
high, snowmayblowunderthe augerhousing.If the shaveplatewears
out excessively,or the snowthrowerdoesnot self-propel,the shave
plate maybetoo low the groundand needsto beadjusted.
NOTE: Onnewsnowthrowersor machineswitha newshaveplate
installed,the augerpaddlesmay be slightlyoff the ground.
Toadjustthe shaveplateproceedas follows:
1. Runthe snowthroweruntilthe fueltank is empty.
2. Pullthe startercorduntil resistanceis felt.Then tip the snow
throwerbackuntilit restsonthe handles.To ensurethat the snow
throwerdoesnot tip forward,it maybe necessaryto securethe
handleto the groundwitha blockor other object.
3. Loosenthefourflangelocknutsandcarriagescrewswhichsecurethe
shaveplatetothehousing.SeeFigure20.Movetheshaveplatetothe
appropriatepositionandretightenthenutsandscrewssecurely.
ReversibleShavePlate
J
16 ``.¸
Figure20
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