Spark Plug; Air Cleaner; General Recommendations; Engine Maintenance - Craftsman 247.37031 Operator's Manual

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.
f
Electrode
Figure15
NOTE: Replacewith a Champion®RJ2YXLEspark plug.
3. Checkthegap with a wire gauge.See Figure15.Sparkplug gap
shouldbe 0.020in (0.51ram). 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.
Figure16
NOTE:Do notuse pressurizedair or solventsto cleanthe filter.Pres-
surizedair can damagethefilter and solventswill dissolvethefilter.
1. Loosenthe fastenerthat holdsthe coverand tilt plastichousing
coveron sideof enginedown. See Figure16.
2. Removeair filter from plastichousingcover.
3. Toloosendebris,gentlytap the filter on a hard surface,if the filter
is excessively dirty, replacewith a newfilter.
4. insert cover'stabs into slotsin bottomof base.
5. Tilt cover up into placeand securewithfastener.
15