Figure47
1.Air-cleanerclamps
3.Primaryairlter
2.Air-cleanercover
4.Secondaryairlter
ServicingthePrimaryFilter
1.Donotcleanthepaperlter,replaceit(Figure47).
2.Inspecttheelementfortears,anoilylm,ordamageto
therubberseal.
3.Replacethepaperelementifitisdamaged.
ServicingtheSecondaryFilter
Donotcleanthesecondarylter,replaceit.
Important:Donotattempttocleanthesecondarylter.
Ifthesecondarylterisdirty,thentheprimarylteris
damagedandyoushouldreplacebothlters.
InstallingtheFilters
Important:Topreventenginedamage,alwaysoperate
theenginewithbothairltersandthecoverinstalled.
1.Ifinstallingnewlters,checkeachlterforshipping
damage.
Note:Donotuseadamagedlter.
2.Ifthesecondarylterisbeingreplaced,carefullyslide
itintothelterbody(Figure47).
3.Carefullyslidetheprimarylteroverthesecondary
lter(Figure47).
4.Ensurethatitisfullyseatedbypushingontheouter
rimofthelterwhileinstallingit.
Important:Donotpressonthesoftinsidearea
ofthelter.
5.Installtheair-cleanercoverwiththebreathercapdown,
androtatesothattheretainingclampslockthecover
inplace(Figure47).
ServicingtheEngineOil
OilType:Detergentoil(APIserviceSG,SH,SJ,orhigher)
OilCapacityfor74923,74925,and74927engines:witha
lterchange,2.3L(77oz);withnolterchange,2.1L(70oz)
OilCapacityfor74922,78922,and78924engines:witha
lterchange,2.1L(71oz);withnolterchange,1.8L(61oz)
Viscosity:Seethetablebelow.
Figure48
Note:Useofmulti-gradeoils(5W-20,10W-30,or10W-40)
increaseoilconsumption.Checktheoillevelmorefrequently
whenusingthem.
CheckingtheEngine-OilLevel
ServiceInterval:Beforeeachuseordaily
Note:Checktheoilwhentheengineiscold.
WARNING
Contactwithhotsurfacesmaycausepersonal
injury.
Keepyourhands,feet,face,clothing,andother
bodypartsawayfromthemuferandotherhot
surfaces.
Important:Donotoverllthecrankcasewithoil
becausedamagetotheenginemayresult.Donotrun
enginewithoilbelowtheLowmarkbecausetheengine
maybedamaged.
1.Disengagetheblade-controlswitch(PTO),movethe
motion-controlleverstotheNEUTRAL-LOCKposition,
andsettheparkingbrake.
2.Shutofftheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position(Figure49).
36