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Alwaysstopengine,disconnectsparkplugwire,andgroundagainst
enginebeforeperformingany typeof maintenanceon yourmachine.
GENERAL RECOMMENDATIONS
• Alwaysobservesafetyruleswhenperformingany maintenance.
• Thewarrantyon thislawnmowerdoesnot coveritemsthathave
beensubjectedto operatorabuseor negligence.To receivefull
valuefromwarranty,operatormustmaintainthe equipmentas
instructedhere.
• Changingof engine-governedspeedwill voidenginewarranty.
• Alladjustmentsshouldbecheckedat leastonceeach season.
• Periodicallycheckall fastenersand make suretheseare tight.
ENGINE MAINTENANCE
Spark Plug
NOTE:incorrectsparkplugscan causeenginedamage.
f
Electrode
SealingWasher
0.028-.030 in. Gap
(0.70-0.80mm)
Figure12
Forgoodperformance,the sparkplugmustbeproperlygappedand
freeof deposits.Checkthe sparkplugevery50 hoursor oncea
season.Replacethe sparkplugevery200 hoursof operation.
1. Disconnectthe cap fromthe spark plug,and removeanydirt from
the sparkplugarea.
2. Use the propersize sparkplug wrenchto removethe spark plug.
3. inspectthe sparkplug. Replaceit if damaged,badlyfouled,if the
sealingwasheris in poorcondition,or if theelectrodeis worn.
4. Measurethe electrodegap with a suitablegauge.Thecorrectgap
is 0.028- 0.030in. (0.70- 0.80 ram).See Figure12.If adjustment
is needed,correctthe gapby carefullybendingthe side electrode.
5. install the sparkplug carefully,by hand,to avoidcross-threading.
6. After thespark plug is seated,tightenwith the propersize spark
plugwrenchto compressthe washer.
Wheninstallinga newsparkplug,tighten1/2turn afterthe sparkplug
seatsto compressthe washer.
Whenreinstallingthe originalsparkplug,tighten1/8-1/4turn afterthe
sparkplugseatsto compressthe washer.
NOTE:Properlytightenthe sparkplug.A loosesparkplugcan become
veryhotandcan damagethe engine.Overtighteningthesparkplug
candamagethethreadsin the cylinderhead.
7. Attachthe sparkplug capto thespark plug.
Air Cleaner
A dirtyaircleanerwill restrictairflowto the carburetorandcausepoor
engineperformance,inspectthe filter eachtime theengine is oper-
ated.Youwill needto cleanthe filtermorefrequentlyif youoperatethe
enginein verydusty areas.
Cleantheair cleanerevery25hoursof operationoronce a season.
Replacetheaircleanerevery200 hoursof operation.
NOTE:Operatingthe enginewithoutafilter,or with damagedfilter,will
allowdirt to enterthe engine,causingrapidenginewear.
Inspection
1. Pressthe latchtabs on the top of the air cleanercover,and
removethe cover.Checkthe filter to be sureit is cleanand in
goodcondition.SeeFigure13.
2. Reinstallthe filterandaircleanercover.
Cleaning
1. Tapthe filter severaltimeson a hard surfaceto removedirt, or
blowcompressedair notexceeding30 psithroughthefilter from
the cleanside thatfacestheengine.Nevertryto brushoff dirt.
Brushingwill forcedirt intothe fibers.
2. Wipedirt from the air cleanerbodyand cover usinga moist rag.
Becarefulto preventdirt fromenteringthe airductthatleadsto
the carburetor.
17
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