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Removethespark plug bootanduse a sparkplug wrenchto
removethe plug.See Figure20.
Figure20
2. Visuallyinspectthe sparkplug.Discardthe sparkplugif thereis
apparentwear,orif the insulatoris crackedor chipped.Cleanthe
sparkplugwitha wirebrush if it is to be reused.
3. Measurethe plug gap with a feelergauge.Correctas necessary
by bendingsideelectrode.SeeFigure21.The gapshouldbeset
to 0.030in.
Electrode
0.02-0.03 in.
===_ 4=======0.60-0.80 mm
Servicing the Air Cleaner
Neverusegasolineor lowflashpoint solventsfor cleaningtheair
cleanerelement.A fireor explosioncould result.
The air cleanerpreventsdamagingdirt, dust,etc.,fromenteringthe
carburetorandbeing forcedintothe engineand is importantto engine
lifeand performance.Neverrunthe enginewithoutanair cleaner
completelyassembled.Checkthe air cleanerbeforeeachuse.
Paperfilterscannotbecleanedand mustbe replacedoncea year
or every100operatinghours;moreoftenif usedinextremelydusty
conditions.
1. Pressthetab on the air filtercover,lift the coverand removethe
air filter.See Figure22.
Air Filter
Cover
Filter
_Foam .....................
Element ............
Figure22
2. Discardoldair filter.
3. installnewair filter.
4. Closethe cover.
NOTE:If the filteris tornor damagedinany way,replaceit.
Do notsprayenginewithwaterto cleanbecausewatercould
contaminatefuel.Usinga gardenhoseor pressurewashingequip-
mentcan alsoforcewaterintothe muffleropening.Waterthatpasses
throughthe mufflercan enterthe cylinder,causingdamage.
Cleaning the Engine
Figure21
4. Checkthatthe sparkplugwasheris in good conditionand thread
the sparkplug in by handto preventcross-threading.
5. After thesparkplugis seated,tightenwith a spark plugwrenchto
compressthe washer.
NOTE:Wheninstallinga newsparkplug,tighten 1/2turn afterthe
sparkplugseatsto compressthe washer.Whenreinstallinga used
sparkplug,tighten 1/8-1/4turnafterthe spark plug seatsto compress
the washer.
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.Cleanwitha brushor compressedair.
18
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