Engine Maintenance - Craftsman 247.79651 Operator's Manual

Alwaysstop engine,disconnectspark plugwire, and groundagainst
enginebeforeperforming any type of maintenance on yourmachine.
GENERAL RECOMMENDATIONS
• Alwaysobservesafetyruleswhenperformingany maintenance.
• Thewarrantyon this edger/trencherdoesnotcover itemsthat
havebeensubjectedto operatorabuseor negligence. T o receive
full valuefrom warranty,operatormustmaintaintheequipmentas
instructedhere.
• Changingof engine-governed speedwill voidenginewarranty.
• All adjustmentsshouldbe checkedat leastonceeach season.
• Periodically checkall fastenersand make suretheseare tight.
ENGINE MAINTENANCE
Spark Plug
Forgood performance, t he spark plug mustbe properlygappedand
freeof deposits.Replacethe spark plug annually.
1. Disconnectthe cap fromthe spark plug,and removeanydirt from
the sparkplug area.
2. Use the propersize sparkplug wrenchto removethe spark plug.
NOTE: Replacewith a ChampionRJ19LMspark plug.
3. Checkthegap (A) with a wiregauge(B). See Figure11.Spark
plug gap shouldbe 0.030in (0.76ram). if necessary,resetthe
gap.
4. install and tightenthe sparkplug to the recommended torque(180
Ib-in[20 Nm]).
5. Attachthe sparkplug capto thespark plug.
Air Cleaner
A dirty air cleanerwill restrictair flow to the carburetorand causepoor
engineperformance, i nspectthe filter eachtime theengine is oper-
ated.You will needto cleanthe filter morefrequentlyif youoperatethe
enginein verydusty areas.
Cleantheair cleanerevery 25 hoursof operationor once a season.
Replacetheair cleanerannually.
Neverstartor run the enginewith the air cleanerassemblyor theair
filter removed.
NOTE:Do notuse pressurizedair or solventsto cleanthe filter.Pres-
surizedair can damagethefilter and solventswill dissolvethefilter.
1. Removethescrew(A) from the top of the air filter cover(B). See
Figure12.
2. Topreventdebrisfrom fallingintothe carburetor,carefullyremove
the air filter cover.
3. Removethefoam element(C)from the air filter base.
Figure11
Figure12
4. Washthe foam elementin liquid detergentand water.Squeeze
dry the foam elementin a cleancloth.
5. Saturate the foam elementwith clean engineoil.To removethe
excessengineoil, squeezethe foam elementin a cleancloth.
6. installthe foamelementinto theair filter base.
7. installthe air filter coveronto theair filter baseand securewith
screw.
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