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1. Removethespark plug bootanduse a sparkplugwrenchto
removethe plug.See Figure21.
Figure21
2. Visuallyinspectthe sparkplug.Discardthe sparkplugif thereis
apparentwear,orif the insulatoris crackedor chipped.Cleanthe
sparkplugwitha wirebrush if it is to be reused.
3. Measurethe pluggapwitha feelergauge.Correctas necessaryby
bendingsideelectrode.SeeFigure22.Thegapshouldbe0.030".
F
Figure22
4. Checkthatthe sparkplugwasheris in good conditionandthread
the sparkplug in by handto preventcrossthreading.
5. After thesparkplugis seated,tightenwitha sparkplugwrenchto
compressthe washer.
NOTE:Wheninstallinga newsparkplug,tighten1/2turnafterthe spark
plugseatstocompressthewasher.Whenreinstallinga usedsparkplug,
tighten1/8-1/4turnafterthesparkplugseatsto compressthewasher.
Servicing the Air Cleaner
Neverusegasolineor lowflashpoint solventsfor cleaningtheair
cleanerelement.A fireor explosioncould result.
The air cleanerpreventsdamagingdirt, dust,etc.,fromenteringthe
carburetorandbeingforcedintothe engineandis importantto engine
lifeand performance.Neverrunthe enginewithoutan air cleaner
completelyassembled.Checkthe air cleanerbeforeeachuse.
Paperfilterscannotbecleanedand mustbereplacedoncea year
or every100operatinghours;moreoftenif usedin extremelydusty
conditions.
1. Pressthetab on the air filtercover,lift the coverand removethe
air filter.See Figure23.
.............
Air Filter
Cover
Filter
Figure23
2. Discardoldair filter.
3. Installnewair filter.
4. Closethe cover.
NOTE:ifthe filter is tornor damagedin any way,replaceit.
Cleaning the Engine
Do notsprayenginewithwaterto cleanbecausewatercould
contaminatefuel.Usinga gardenhoseor pressurewashingequip-
mentcan alsoforcewaterintothe muffleropening.Waterthatpasses
throughthe mufflercan enterthe cylinder,causingdamage.
Accumulationof debrisaroundmufflercouldcausea fire. Inspectand
clean beforeevery use.
Ifthe enginehas beenrunning,allow it to coolfor at leasthalf an hour
beforecleaning.Periodicallyremovedirt build-upfrom the engine.
Cleanaroundthe muffler.Cleanwith a brushor compressedair.
17
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