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Removethespark plug bootand use a sparkplug wrenchto
removethe plug.See Figure22.
Figure22
2.
Visuallyinspectthe spark plug.Discardthe spark plug if thereis
apparentwear,or if the insulatoris crackedor chipped.Cleanthe
sparkplug with a wirebrush if it is to be reused.
3.
Measurethe plug gap with a feelergauge.Correctas necessary
by bendingsideelectrode.See Figure23. Thegap shouldbe set
to 0.030in.
Servicing
the Air Cleaner
Neverusegasolineor lowflash point solventsfor cleaningtheair
cleanerelement.A fireor explosioncould result.
The air cleanerpreventsdamagingdirt, dust,etc., from enteringthe
carburetorand being forcedintothe engineand is importantto engine
lifeand performance.Neverrunthe enginewithoutan air cleaner
completelyassembled.Checkthe air cleanerbeforeeachuse.
Paperfilterscannot be cleanedand mustbe replacedoncea year
or every 100operatinghours;moreoften if usedin extremelydusty
conditions.
1.
Pressthetab on the air filtercover,lift the coverand removethe
air filter.See Figure24.
Air Filter
Cover
Filter
._._Foam
...............
Figure23
4.
Checkthatthe sparkplug washeris in good conditionand thread
the sparkplug in by handto preventcross-threading.
5.
After thespark plug is seated,tightenwith a spark plugwrenchto
compressthe washer.
NOTE:Wheninstallinga newspark plug,tighten 1/2turn after the
sparkplug seatsto compressthe washer.Whenreinstalling a used
sparkplug,tighten 1/8-1/4 turnafter the spark plug seatsto compress
the washer.
Figure24
2.
Discardold air filter.
3.
Installnewair filter.
4.
Closethe cover.
NOTE:If the filter is tornor damagedin any way,replaceit.
Cleaning
the Engine
Do notsprayengine with waterto cleanbecausewater could
contaminatefuel. Usinga gardenhoseor pressurewashingequip-
mentcan alsoforce waterintothe muffleropening.Waterthat passes
throughthe mufflercan enterthe cylinder,causingdamage.
Accumulationof debrisaround mufflercouldcausea fire. Inspectand
clean beforeevery use.
If the enginehas been running,allow it to coolfor at leasthalf an hour
beforecleaning.Periodically removedirt build-upfrom the engine.
Cleanaroundthe muffler.Cleanwith a brushor compressed air.
18
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