General Recommendations; Engine Maintenance - Sears Craftsman 247.887760 Manual Del Operador

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Alwaysstopengine,disconnectspark plugwire, and groundagainst
enginebeforeperformingany type of maintenance on yourmachine.
GENERAL
RECOMMENDATIONS
*
Alwaysobservesafetyruleswhenperformingany maintenance.
*
Thewarrantyon this lawnmowerdoesnot coveritemsthat have
been subjectedto operatorabuseor negligence. T o receivefull
valuefromwarranty,operatormustmaintaintheequipmentas
instructedhere.
*
Changingof engine-governed speedwill voidenginewarranty.
*
All adjustmentsshouldbe checkedat least onceeach season.
*
Periodically checkall fastenersand makesuretheseare tight.
f
Electrode
Porcelain
--*
.030 (.76 mm) gap
',_
.j
Figure13
ENGINE
MAINTENANCE
Checking
the Spark
Plug
Cleansparkplug and reset theelectrodegap to 0.030"at least oncea
season;replaceevery 100hoursof operation.
*
Cleanareaaroundthe spark plug base.Do not sandblastspark
plug.Sparkplug shouldbe cleanedby scrapingor wire brushing
and washingwith a commercialsolvent.
*
Removeand inspectthe spark plug.Checkgap to makesureit is
set at .030".See Figure13.
*
Replacethe spark plug if electrodesare pitted,burned,or the
porcelainis cracked.
Servicing
the Air Cleaner
Do notuse pressurized air or solventsto cleanthe air cleaner
cartridge.
Theair cleanerpreventsdamagingdirt, dust,etc.,from enteringthe
carburetorand beingforced intothe engineand is importantto engine
lifeand performance. N everrun the enginewithoutan air cleaner
completelyassembled.
Cleanor replacetheair cleanerevery 25 hoursof operation.
1.
Loosenscrewthat holdsthe air filter cover.
2.
Opencover and removecartridge.See Figure14.
3.
Installnewair cleanercartridge.Cartridgemustfit securelyin
base.
4.
Placecoveroverair cleaner.
5.
Tightenscrew.
f
Screw
Cover
Air Cleaner
Cartridge
Base
\
_t
Figure14
After servicingtheair cleaner,be sureall the removedparts are
reinstalledproperlyin place.Failureto securelyfastentogetherair
cleanercase and air cleanerbodymay causedirt or otherforeign
materialsto enterthe enginewhile it is running,resultingin engine
troublesor failures.
16

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