General Recommendations; Engine Maintenance - Craftsman 247.374330 Operator's Manual

Alwaysstop engine,disconnectsparkplug wire, andground againstengine
before performing anytype of maintenanceon your machine.
GENERAL RECOMMENDATIONS
Always observe safetyruleswhenperforminganymaintenance.
Thewarrantyonthislawnmowerdoesnotcoveritems that 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 or every100hours.
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 QC12YC sparkplug.
3. Check thegapwitha wiregauge. S eeFigure 15.Spark plug gapshouldbe
0.030in(0.76mm).If necessary, resetthe gap.
4. Installandtightenthe sparkplugto the recommended t orque(20ft. lb. [27
am]).
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 or every50hours.
Neverstart or run the engine with the air cleanerassemblyor the air filter
removed.
flOTE: D onot usepressurized a iror solvents to cleanthe filter. Pressurized air can
damage thefilter andsolvents will dissolve the filter.
1. Loosen knobandremove air cleaner c over. S eeFigure 16.
2. Remove p recleaner ( If Equipped) andair filter from base.
3. Replace o r washprecleaner i nwarmwaterwith detergent.Rinse andallow
toairdry.
f
Electrode
Porcelain
1
Figure15
.J
f
6.
7.
Predeaner
Air Filter
J
Figure 16
Toloosendebrisinair filter,gentlytap the filter on ahardsurface. I f thefilter
isexcessively dirty,replace with a newfilter.
Installelement w ith pleatedsideout andseatrubbersealontoedges of
base.
Reinstall predeaner i ntocover, a ligningholeinprecleaner with coverknob.
Reinstall aircleaner c overandsecure with knob.
15