General Recommendations; Engine Maintenance - Craftsman 247.37116 Operator's Manual

21" lawn mower
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Alwaysstop engine,disconnectspark plugwire, and groundagainst
enginebeforeperforming any type of maintenance on yourmachine.
GENERAL
RECOMMENDATIONS
Alwaysobservesafetyruleswhenperformingany maintenance.
Thewarrantyon this lawnmowerdoesnot coveritemsthat have
been subjectedto operatorabuseor negligence. T o receivefull
valuefromwarranty,operatormustmaintainthe equipment a s
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 Champion®RC12YCsparkplug.
3.
Checkthegap with a wire gauge.See Figure15.Sparkplug 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.
f
Electrode
Figure15
Figure 16
NOTE:Do notuse pressurizedair or solventsto cleanthe filter.Pres-
surizedair can damagethefilter and solventswill dissolvethefilter.
1.
Loosenscrewand tilt plastichousingcoveron sideof engine
down.See Figure16.
2.
Removeair filter from plastichousingcover and replacewith
cleanor newfilter.
3.
insert cover'stabs into slotsin bottomof base.
4.
Tilt cover up into placeand tighten screw.
17

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