General Recommendations; Engine Maintenance - Craftsman 247.370000 Operator's Manual

Alwaysstop engine,disconnectsparkplug wire, andground againstengine
before performing anytype of maintenanceon your machine.
GENERAL RECOMMENDATIONS
Always observe safetyruleswhenperforminganymaintenance.
Thewarrantyonthislawnmowerdoesnotcoveritemsthat havebeen
subjected to operatorabuse or negligence. Toreceive full valuefrom
warranty, o peratormustmaintainthe equipment a s
instructed here.
Changing of engine-governed s peed will voidengine warranty.
All adjustments shouldbe checked a t leastonceeachseason.
Periodically c heck all fasteners andmakesurethesearetight.
ENGINE MAINTENANCE
SparkPlug
Forgoodperformance, the sparkplug mustbe properly gapped andfreeof
deposits. R eplace t he sparkplug annually.
1. Disconnect the capfrom the sparkplug,andremove anydirt from the spark
plugarea.
2. Use the propersizesparkplug wrench to remove the sparkplug.
NOTE: Replace w ith aChampion RC12YC sparkplug.
3. Check thegapwitha wiregauge. S eeFigure 12.Spark plug gapshouldbe
0.020in(0.51mm).If necessary, reset t he gap.
4. Installandtightenthe sparkplugto the recommended t orque(180Ib-in [20
Nm]).
5. Attachthe sparkplug capto the sparkplug.
Air Cleaner
Adirty air cleaner w ill restrictairflow to thecarburetorandcause poorengine
performance. Inspect t he filter eachtime the engineisoperated. Y ouwill needto
cleanthe filter morefrequentlyif youoperate the engineinverydustyareas.
Clean the air cleaner e very25hoursofoperationor oncea season. R eplace t he air
cleaner a nnually.
f
Electrode
> < 0.020 in. (.51ram)
Figure12
.J
Figure13
Neverstart or run the engine with the air cleanerassemblyor the air filter
removed.
NOTE: Donot usepressurized a iror solvents to cleanthe filter. Pressurized air can
damage thefilter andsolvents will dissolve the filter.
Theaircleaner s ystemuses afoamelement t hat canbewashedandreused.
1. Openthecover(B)andremove the foamelement ( C).SeeFigure 13.
2. Wash the foamelementinliquiddetergent a ndwater.Squeeze d ry the foam
element i n acleancloth.
3. Saturate the foamelementwith clean engineoil.Toremove the excess
engineoil,squeeze t he foamelementinacleancloth.
4. Installthefoamelement a ndclose the cover.
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