Lawn-Boy 10640, 10640C, 10641, 10641C, 10642 Operator's Manual

FormNo.3361-328RevB

20inMulching/RearBaggingLawn
Mower

ModelNo.10640—SerialNo.290000001andUp

ModelNo.10640C—SerialNo.290000001andUp

ModelNo.10641—SerialNo.290000001andUp

ModelNo.10641C—SerialNo.290000001andUp

ModelNo.10642—SerialNo.290000001andUp

ModelNo.10642C—SerialNo.290000001andUp

ModelNo.10643C—SerialNo.290000001andUp

ModelNo.10644C—SerialNo.290000001andUp

ModelNo.10645—SerialNo.290000001andUp

ModelNo.10646—SerialNo.290000001andUp

ModelNo.10647—SerialNo.290000001andUp

Operator'sManual

Introduction

Readthisinformationcarefullytolearnhowtooperate
andmaintainyourproductproperlyandtoavoidinjury
andproductdamage.Youareresponsibleforoperating
theproductproperlyandsafely.

YoumaycontactLawn-Boydirectlyat
www.Lawn-Boy.comforproductandaccessory
information,helpndingadealer,ortoregisteryour
product.

Wheneveryouneedservice,genuineLawn-Boyparts,
oradditionalinformation,contactanAuthorized
ServiceDealerorLawn-BoyCustomerServiceandhave
themodelandserialnumbersofyourproductready .
Figure1identiesthelocationofthemodelandserial
numbersontheproduct.Writethenumbersinthe
spaceprovided.

Figure1

1.Modelandserialnumberplate

ModelNo.

SerialNo.

Thismanualidentiespotentialhazardsandhas
safetymessagesidentiedbythesafetyalertsymbol
(Figure2),whichsignalsahazardthatmaycauseserious
injuryordeathifyoudonotfollowtherecommended
precautions.

Figure2

1.Safetyalertsymbol

Thismanualusestwowordstohighlightinformation.
Importantcallsattentiontospecialmechanical
informationandNoteemphasizesgeneralinformation
worthyofspecialattention.

Warning

CALIFORNIA

Proposition65Warning

Theengineexhaustfromthisproduct

containschemicalsknowntotheStateof

Californiatocausecancer,birthdefects,

orotherreproductiveharm.

Important:Thisengineisnotequippedwitha
sparkarrestermufer.ItisaviolationofCalifornia

©2008—Lawn-Boy®Inc.
8111LyndaleAvenueSouth
Bloomington,MN55420

Registeratwww.Lawn-Boy .com.

OriginalInstructions(EN)

PrintedintheUSA

AllRightsReserved

PublicResourceCodeSection4442touseoroperate
theengineonanyforest-covered,brush-covered,or
grass-coveredland.Otherstatesorfederalareas
mayhavesimilarlaws.

ThissparkignitionsystemcomplieswithCanadian
ICES-002.

Theenclosed

Engine Owner’ s Man ual

issupplied
forinformationregardingtheUSEnvironmental
ProtectionAgency(EPA)andtheCalifornia
EmissionControlRegulationofemissionsystems,
maintenance,andwarranty.Replacementsmaybe
orderedthroughtheenginemanufacturer.

Formodelswithstatedenginehorsepower,thegross
horsepoweroftheenginewaslaboratoryratedbythe
enginemanufacturerinaccordancewithSAEJ1940.
Asconguredtomeetsafety ,emission,andoperating
requirements,theactualenginehorsepoweronthisclass
oflawnmowerwillbesignicantlylower.

Donottamperwiththeenginecontrolsoralterthe
governorspeed;doingsomaycreateanunsafecondition
resultinginpersonalinjury.

Safety

ThislawnmowermeetsorexceedstheCPSCblade
safetyrequirementsforwalk-behindrotarylawnmowers
andtheB71.1specicationsoftheAmericanNational
StandardsInstituteineffectatthetimeofproduction.

Readandunderstandthecontentsofthismanual
beforeyoustarttheengine.

Thesafetyalertsymbol(Figure2)isusedtoalertyou
topotentialpersonalinjuryhazards.Obeyallsafety
messagesthatfollowthissymboltoavoidpossibleinjury
ordeath.Improperlyusingormaintainingthismower
couldresultininjuryordeath.Toreducethispotential,
complywiththefollowingsafetyinstructions.

Thefollowinginstructionshavebeenadaptedfromthe
ANSI/OPEIstandardB71.1-2003.

Thiscuttingmachineiscapableofamputating
handsandfeetandofthrowingobjects.Failure
toobservethefollowingsafetyinstructionscould
resultinseriousinjuryordeath.

GeneralOperation

•Read,understand,andfollowallinstructionsonthe
machineandinthemanual(s)beforestarting.

•Donotputhandsorfeetnearorunderthemachine.
Keepclearofthedischargeopeningatalltimes.

•Onlyallowresponsibleadults,whoarefamiliarwith
theinstructions,tooperatethismachine.

•Cleartheareaofobjectssuchasrocks,wire,toys,
etc.,whichcouldbethrownbytheblade.Stay
behindthehandlewhentheengineisrunning.

•Besuretheareaisclearofbystandersbefore
operating.Stopmachineifanyoneentersthearea.

•Donotoperatemachinebarefootedorwhilewearing
sandals.Alwayswearsubstantialfootwear.

•Donotpullmachinebackwardunlessabsolutely
necessary.Alwayslookdownandbehindbeforeand
whilemovingbackward.

•Neverdirectdischargedmaterialtowardanyone.
Avoiddischargingmaterialagainstawallor
obstruction.Materialmayricochetbacktoward
theoperator.Stopthebladewhencrossinggravel
surfaces.

•Donotoperatemachinewithouttheentiregrass
catcher,dischargeguard,rearguard,orothersafety
protectivedevicesinplaceandworking.

•Neverleavearunningmachineunattended.

•Stoptheengineandwaituntilthebladecomes
toacompletestopbeforecleaningthemachine,
removinggrasscatcher,oruncloggingthedischarge
guard.

•Operatemachineonlyindaylightorgoodarticial
light.

•Donotoperatemachinewhileundertheinuence
ofalcoholordrugs.

•Neveroperatemowerinwetgrass.Alwaysbesure
ofyourfooting;walk;neverrun.

•Disengagethedrivesystem,ifsoequipped,before
startingtheengine.

•Ifthemachineshouldstarttovibrateabnormally,
stoptheengineandcheckforthecauseimmediately.
Vibrationisgenerallyawarningoftrouble.

•Alwaysweareyeprotectionwhenoperatingmachine.

•Seemanufacturer’sinstructionsforproperoperation
andinstallationofaccessories.Onlyuseaccessories
approvedbythemanufacturer.

SlopeOperation

Slopesareamajorfactorrelatedtoslipandfallaccidents,
whichcanresultinsevereinjury.Operationonallslopes
requireextracaution.Ifyoufeeluneasyonaslope,do
notmowit.

2

•Mowacrossthefaceofslopes;neverupanddown.
Exerciseextremecautionwhenchangingdirection
onslopes.

•Watchforholes,ruts,bumps,rocks,orotherhidden
objects.Uneventerraincouldcauseaslipandfall
accident.Tallgrasscanhideobstacles.

•Donotmowonwetgrassorexcessivelysteepslopes.
Poorfootingcouldcauseaslipandfallaccident.

•Donotmowneardrop-offs,ditches,or
embankments.Youcouldloseyourfootingor
balance.

Children

Tragicaccidentscanoccuriftheoperatorisnotalertto
thepresenceofchildren.Childrenareoftenattractedto
themachineandthemowingactivity.Neverassume
thatchildrenwillremainwhereyoulastsawthem.

•Keepchildrenoutofthemowingareaandunder
thewatchfulcareofaresponsibleadultotherthan
theoperator.

•Bealertandturnmoweroffifachildentersthearea.

•Neverallowchildrentooperatethemachine.

•Useextracarewhenapproachingblindcorners,
shrubs,trees,orotherobjectsthatmayblockyour
viewofachild.

Service

SafeHandlingofGasoline

Toavoidpersonalinjuryorpropertydamage,use
extremecareinhandlinggasoline.Gasolineis
extremelyammableandthevaporsareexplosive.

•Extinguishallcigarettes,cigars,pipes,andother
sourcesofignition.

•Useonlyanapprovedgasolinecontainer.

•Neverremovegascaporaddfuelwiththeengine
running.Allowenginetocoolbeforerefueling.

•Neverrefuelthemachineindoors.

•Neverstorethemachineorfuelcontainerwhere
thereisanopename,spark,orpilotlightsuchas
onawaterheateroronotherappliances.

•Neverllcontainersinsideavehicleoronatruck
ortrailerbedwithaplasticliner.Alwaysplace
containersonthegroundawayfromyourvehicle
beforelling.

•Removegas-poweredequipmentfromthetruck
ortrailerandrefuelitontheground.Ifthisisnot

possible,thenrefuelsuchequipmentwithaportable
container,ratherthanfromagasolinedispenser
nozzle.

•Keepthenozzleincontactwiththerimofthefuel
tankorcontaineropeningatalltimesuntilfuelingis
complete.Donotuseanozzlelock-opendevice.

•Iffuelisspilledonclothing,changeclothing
immediately.

•Neveroverllfueltank.Replacegascapandtighten
securely.

Exhaustcontainscarbonmonoxide,an
odorless,deadlypoisonthatcankillyou.

Donotruntheengineindoorsorinanenclosed
area.

GeneralService

•Neveroperatemachineinaclosedarea.

•Keepallnutsandboltstighttobesuretheequipment
isinsafeworkingcondition.

•Nevertamperwithsafetydevices.Checktheir
properoperationregularly.

•Keepmachinefreeofgrass,leaves,orotherdebris
build-up.Cleanupoilorfuelspillageandremove
anyfuel-soakeddebris.Allowmachinetocool
beforestoring.

•Ifyoustrikeaforeignobject,stopandinspectthe
machine.Repair,ifnecessary,beforestarting.

•Nevermakeanyadjustmentsorrepairswiththe
enginerunning.Disconnectthesparkplugwire
andgroundagainstenginetopreventunintended
starting.

•Checkgrasscatchercomponentsandthedischarge
guardfrequentlyandreplacewithmanufacturer’s
recommendedparts,whennecessary.

•Mowerbladesaresharp.Wrapthebladeorwear
gloves,anduseextracautionwhenservicingthem.

•Donotchangetheenginegovernorsettingor
overspeedtheengine.

•Maintainorreplacesafetyandinstructionlabels,as
necessary.

3

SafetyandInstructionalDecals

Important:Safetyandinstructiondecalsarelocatednearareasofpotentialdanger.Replacedamaged

decals.

94-8072

108-4791

117-4143

1.Warning—readtheOperator’sManual.

2.Thrownobjecthazard—keepbystandersasafedistance
fromthemachine.

3.Cutting/dismembermenthazardofhandorfoot,mower
blade—disconnectthesparkplugwireandreadthe
instructionsbeforeservicingorperformingmaintenance.

4.Cutting/dismembermenthazardofhandorfoot,mower
blade—stayawayfrommovingpartsandkeepallguards
andshieldsinplace.

5.Cutting/dismembermenthazardofhandorfoot,mower
blade—donotmowupanddownslopes,onlymowacross;
stopthemowerandengine,pickupdebrisbeforeoperating;
lookbehindanddownwhenreversing.

104-7953

Electric-startmodelsonly

1.Warning—readtheOperator’sManualforinformationonchargingthebattery;containslead;donotdiscard.

2.ReadtheOperator’sManual.

4

Setup

Important:Removeanddiscardtheprotective

plasticsheetthatcoverstheengine.

1.UnfoldingtheHandle

Procedure

Foldingorunfoldingthehandleimproperlycan
damagethecables,causinganunsafeoperating
condition.

•Donotdamagethecableswhenfoldingor
unfoldingthehandle.

•Ifacableisdamaged,contactanAuthorized
ServiceDealer.

1.Removethehandleknobsfromthemowerhousing
(Figure3).

Important:Routethecablestotheoutsideof
thehandleasyouinstallthehandle.

Figure3

1.Handleknob(2)

2.Movethehandletotheoperatingposition.

3.Installandtightenthehandleknobsthatyou
removedinstep1(Figure3).

2.FillingtheEnginewithOil

Procedure

Yourmowerdoesnotcomewithoilintheengine,butit
doescomewithabottleofoil.

1.Removethedipstick(Figure4).

Figure4

2.Slowlypouroilintotheoillltubeuntiltheoillevel
reachestheFulllineonthedipstick(Figure4).Do
notoverll.(Max.ll:20oz.(0.59l),type:SAE30
detergentoilwithanAPIserviceclassicationofSF,
SG,SH,SJ,SL,orhigher.)

Note:Ifyouoverlltheengine,poursomeoilout
ofitasdirectedinChangingtheEngineOil.

3.Installthedipsticksecurely.

Important:

Change the engine oil after the r st

5 operating hour s

;changeityearlythereafter.

RefertoChangingtheEngineOil.

3.InstallingtheFuse

Procedure

Electric-startmodelsonly

Yourmowercomeswitha40-ampfusethatprotectsthe
electricstarter.

Important:Youcannotstartthemowerwiththe
electricstarterorchargethebatteryunlessyou
installthefuse.

1.Unclipbothendsofthebatterycoverandremoveit
(Figure5).

5

Figure5

2.Insertthefuseintothefuseholder(Figure6).

Figure6

3.Installthebatterycover.

4.ChargingtheBattery

Procedure

Electric-startmodelsonly

RefertoChargingtheBatteryintheMaintenance
section.

ProductOverview

Figure7

Self-propelmodelshown

1.Sparkplug8.Self-propeldrivebar
(self-propelmodelsonly)

2.Primer(models10643C

and10644Conly)

9.Ignitionkey(electric-start
modelsonly)

3.Airlter10.Grassbag

4.Fueltankcap

11.Battery(electric-start
modelsonly)

5.Oilll/Dipstick12.Cuttingheightlevers(4)

6.Recoilstarthandle13.Batterycharger
(electric-startmodels
only)

7.Bladecontrolbar

Operation

Attachments/Accessories

AselectionofLawn-Boyapprovedattachmentsand
accessoriesareavailableforusewiththemachine
toenhanceandexpanditscapabilities.Contact
yourAuthorizedServiceDealerorDistributoror
gotowww .Lawn-Boy .comforalistofallapproved
attachmentsandaccessories.

6

FillingtheFuelTank

Gasolineisextremelyammableandexplosive.
Areorexplosionfromgasolinecanburnyou
andothers.

•Topreventastaticchargefromignitingthe
gasoline,placethecontainerand/ormower
directlyonthegroundbeforelling,notina
vehicleoronanobject.

•Fillthetankoutdoorswhentheengineis
cold.Wipeupspills.

•Donothandlegasolinewhensmokingor
aroundanopenameorsparks.

•Storegasolineinanapprovedfuelcontainer,
outofthereachofchildren.

Fillthefueltankwithfreshunleadedregulargasoline
fromamajorname-brandservicestation(Figure8).

Important:Toreducestartingproblems,add
fuelstabilizertothefuelallseason,mixingitwith
gasolinelessthan30daysold.

Figure8

CheckingtheEngineOilLevel

ServiceInterval:Beforeeachuseordaily

1.Removethedipstick,wipeitclean,andfullyinstall
thedipstick(Figure9).

Figure9

2.Removethedipstickandchecktheoillevel
(Figure9).IftheoillevelisbelowtheAddmarkon
thedipstick,slowlypouroilintotheoillltubeto
raisetheoilleveltotheFullmarkonthedipstick.
Donotoverll.(Max.ll:20oz.(0.59l),type:SAE
30detergentoilwithanAPIserviceclassicationof
SF,SG,SH,SJ,SL,orhigher.)

Note:Ifyouoverlltheengine,poursomeoilout
ofitasdirectedinChangingtheEngineOil.

3.Installthedipstick.

AdjustingtheCuttingHeight

Adjustingthecuttingheightmaybringyouinto
contactwiththemovingblade,causingserious
injury.

•Stoptheengineandwaitforallmovingparts
tostop.

•Donotputyourngersunderthehousing
whenadjustingthecuttingheight.

Iftheenginehasbeenrunning,themuferwill
behotandcanseverelyburnyou.Keepaway
fromthehotmufer.

Adjustthecuttingheightasdesired.Setallfourwheels
tothesameheight.

7

Note:Toraisethemower,moveallthecuttingheight
leversforward;tolowerthemower,movetheallthe
cuttingheightleversrearward(Figure10).

Figure10

1.Raisethemower2.Lowerthemower

Note:Thecuttingheightsettingsare1inch(25mm);
1-1/2inch(38mm);2inches(51mm);2-1/2inches
(64mm);3inches(76mm);3-1/2inches(89mm);and
4inches(102mm).

StartingtheEngine

1.Firmlypushintheprimer3timeswithyourthumb,
holdingtheprimerinforasecondbeforereleasing
iteachtime(models10643Cand10644Conly)
(Figure11).

Figure11

Note:Iftheairtemperatureisbelow55°F(13°C),

rmlypushtheprimerin5times.

2.Holdthebladecontrolbar(Figure12)againstthe
handle.

Figure12

1.Bladecontrolbar

3.Turntheignitionkey(Figure13)(electric-start
modelsonly)orpullrecoilstarthandle(Figure14).

Figure13

Figure14

Note:Ifthemowerdoesnotstartafterseveral

attempts,contactanAuthorizedServiceDealer.

8

UsingtheSelf-propelDrive

Self-propelmodelsonly

Tooperatetheself-propeldrive,squeezetheself-propel
drivebar(Figure15)towardthehandleandholdit.

Figure15

1.Self-propeldrivebar

Todisengagetheself-propeldrive,releasetheself-propel
drivebar.

Note:Themaximumself-propelgroundspeedisxed.
Toreducethegroundspeed,increasethespacebetween
theself-propeldrivebarandthehandle.

StoppingtheEngine

ServiceInterval:Beforeeachuseordaily

Tostoptheengine,releasethebladecontrolbar
(Figure16).

Note:Removetheignitionkeywhenyouleavethe
mower(electric-startmowersonly).

Important:Whenyoureleasethebladecontrol
bar,boththeengineandbladeshouldstopwithin
3seconds.Iftheydonotstopproperly,stopusing
yourmowerimmediatelyandcontactanAuthorized
ServiceDealer.

Figure16

MulchingtheClippings

Yourmowercomesfromthefactoryreadytomulchthe
grassandleafclippingsbackintothelawn.

Ifthegrassbagisonthemower,removeit(referto
RemovingtheGrassBag)beforemulchingtheclippings.

BaggingtheClippings

Usethegrassbagwhenyouwanttocollectgrassand
leafclippingsfromthelawn.

Aworngrassbagcouldallowsmallstones
andothersimilardebristobethrowninthe
operator’sorbystander’sdirectionandresultin
seriouspersonalinjuryordeathtotheoperator
orbystanders.

Checkthegrassbagfrequently.Ifitisdamaged,
installanewLawn-Boyreplacementbag.

Thebladeissharp;contactingthebladecan
resultinseriouspersonalinjury.

Stoptheengineandwaitforallmovingpartsto
stopbeforeleavingtheoperatingposition.

InstallingtheGrassBag

1.Liftupthereardeector(Figure17).

Figure17

1.Reardeector

2.Insertthegrassbaghandleontothenotchesonthe
handlebrackets(Figure17).

9

RemovingtheGrassBag

1.Liftupthereardeector(Figure17).

2.Liftthegrassbaghandleoutfromthenotchesonthe
handlebracketsandremovethebagfromthemower.

3.Closethereardeector.

OperatingTips

GeneralMowingTips

•Cleartheareaofsticks,stones,wire,branches,and
otherdebristhatthebladecouldhit.

•Avoidstrikingsolidobjectswiththeblade.Never
deliberatelymowoveranyobject.

•Ifthemowerstrikesanobjectorstartstovibrate,
immediatelystoptheengine,disconnectthewire
fromthesparkplug,andexaminethemowerfor
damage.

•Forbestperformance,installanewbladebeforethe
cuttingseasonbegins.

•ReplacethebladewhennecessarywithaLawn-Boy
replacementblade.

CuttingGrass

•Cutonlyaboutathirdofthegrassbladeatatime.
Donotcutbelowthe2inch(51mm)settingunless
thegrassissparseoritislatefallwhengrassgrowth
beginstoslowdown.RefertoAdjustingtheCutting
Height.

•Whencuttinggrassover6inches(15cm)tall,mow
atthehighestcuttingheightsettingandwalkslower;
thenmowagainatalowersettingforthebestlawn
appearance.Ifthegrassistoolong,themowermay
plugandcausetheenginetostall.

•Mowonlydrygrassorleaves.Wetgrassandleaves
tendtoclumpontheyardandcancausethemower
toplugortheenginetostall.

Wetgrassorleavescancauseseriousinjuryif
youslipandcontacttheblade.Mowonlyindry
conditions.

•Alternatethemowingdirection.Thishelpsdisperse
theclippingsoverthelawnforevenfertilization.

•Ifthenishedlawnappearanceisunsatisfactory,try
oneormoreofthefollowing:

–Replacethebladeorhaveitsharpened.

–Walkataslowerpacewhilemowing.

–Raisethecuttingheightonyourmower.

–Cutthegrassmorefrequently.

–Overlapcuttingswathsinsteadofcuttingafull

swathwitheachpass.

–Setthecuttingheightonthefrontwheelsone

notchlowerthantherearwheels.Forexample,
setthefrontwheelsat2inches(51mm)andthe
rearwheelsat2-1/2inches(64mm).

CuttingLeaves

•Aftercuttingthelawn,ensurethathalfofthelawn
showsthroughthecutleafcover.Youmayneedto
makemorethanonepassovertheleaves.

•Iftherearemorethan5inches(13cm)ofleaves
onthelawn,setthefrontcuttingheightoneortwo
notcheshigherthantherearcuttingheight.

•Slowdownyourmowingspeedifthemowerdoes
notcuttheleavesnelyenough.

10

Maintenance

Note:Determinetheleftandrightsidesofthemachinefromthenormaloperatingposition.

RecommendedMaintenanceSchedule(s)

MaintenanceService

Interval

MaintenanceProcedure

Aftertherst5hours

•Changetheengineoil.

Beforeeachuseordaily

•Checktheengineoillevel.

•Ensurethattheenginestopswithin3secondsafterreleasingthebladecontrolbar.

•Cleangrassclippingsanddirtfromunderthemower.

Every25hours

•Replacetheairlter;replaceitmorefrequentlyindustyoperatingconditions.

•Chargethebatteryfor24hours(electric-startmodelsonly).

Beforestorage

•Emptythefueltankbeforerepairsasdirectedandbeforeannualstorage.

Yearly

•Changetheengineoil.

•Replacethebladeorhaveitsharpened(morefrequentlyiftheedgedullsquickly).

•RefertoyourEngineOperator’sManualforanyadditionalyearlymaintenance
procedures.

Important:Refertoyour

Engine Operator’ s Man ual

foradditionalmaintenanceprocedures.

PreparingforMaintenance

1.Stoptheengineandwaitforallmovingpartstostop.

2.Disconnectthesparkplugwirefromthesparkplug
(Figure18)beforeperforminganymaintenance
procedure.

Figure18

1.Sparkplugwire

3.Afterperformingthemaintenanceprocedure(s),
connectthesparkplugwiretothesparkplug.

Important:Beforetippingthemowertochange
theoilorreplacetheblade,allowthefueltank
torundrythroughnormalusage.Ifyoumust
tipthemowerpriortorunningoutoffuel,usea
handfuelpumptoremovethefuel.Alwaystip
themowerontoitssidewiththedipstickdown.

Tippingthemowermaycausethefueltoleak.
Gasolineisammable,explosiveandcancause
personalinjury.

Runtheenginedryorremovethegasolinewith
ahandpump;neversiphon.

11

ReplacingtheAirFilter

ServiceInterval:Every25hours

1.Useascrewdrivertoopentheairltercover
(Figure19).

Figure19

2.Replacetheairlter(Figure20).

Figure20

3.Installthecover.

ChangingtheEngineOil

ServiceInterval:Aftertherst5hours

Yearly

Changetheengineoilaftertherst5operating
hours;changeityearlythereafter.

Runtheengineafewminutesbeforechangingtheoil
towarmit.Warmoilowsbetterandcarriesmore
contaminants.

1.Performthepre-maintenanceprocedures;referto
PreparingforMaintenance.

2.Removethedipstick(Figure21).

Figure21

3.Tipthemowerontoitsside,withthedipstickdown,
todraintheusedoiloutthroughtheoillltube
(Figure22).

Figure22

4.Slowlypouroilintotheoillltubeuntiltheoillevel
reachestheFulllineonthedipstick(Figure21).Do
notoverll.(Max.ll:20oz.(0.59l),type:SAE30
detergentoilwithanAPIserviceclassicationofSF,
SG,SH,SJ,SL,orhigher.)

Note:Ifyouoverlltheengine,poursomeoilout
ofitasdirectedinstep3above.

5.Installthedipsticksecurely.

6.Disposeoftheusedoilproperlyatalocalrecycling
center.

12

ChargingtheBattery

ServiceInterval:Every25hours

Electric-startmodelsonly

Warning

CALIFORNIA

Proposition65Warning

Batteryposts,terminals,andrelated

accessoriescontainleadandleadcompounds,

chemicalsknowntotheStateofCalifornia

tocausecancerandreproductiveharm.

Washhandsafterhandling.

Chargethebatteryfor24hoursinitially ,thenmonthly
(every25starts)orasneeded.Alwaysusethecharger
inashelteredareaandchargethebatteryatroom
temperature(70°or22°C)wheneverpossible.

1.Connectthechargertothemowerwireharness
locatedbelowtheignitionkey(Figure23).

Figure23

2.Plugthechargerintoawalloutlet.

Note:Whenthebatterynolongerholdsacharge,
recycleordisposeofthelead-acidbatteryaccording
tolocalcodes.

ReplacingtheFuse

Electric-startmodelsonly

Ifthebatterydoesnotchargeortheenginedoesnotrun
withtheelectricstarter,thefusemaybeblown.Replace
itwitha40-ampplug-intypefuse.RefertoInstalling
theFuse.

ReplacingtheBlade

ServiceInterval:Yearly

Important:

Y ou will need a torque wr ench to install

the blade pr oper l y

.Ifyoudonothaveatorque
wrenchorareuncomfortableperformingthis
procedure,contactanAuthorizedServiceDealer.

Examinethebladewheneveryourunoutofgasoline.If
thebladeisdamagedorcracked,replaceitimmediately.
Ifthebladeedgeisdullornicked,haveitsharpenedor
replaceit.

Thebladeissharp;contactingthebladecan
resultinseriouspersonalinjury.

Weargloveswhenservicingtheblade.

1.Disconnectthesparkplugwirefromthesparkplug.
RefertoPreparingforMaintenance.

2.Tipthemowerontoitsside,withtheairlterup.

3.Useablockofwoodtoholdthebladesteady .

4.Removetheblade(turnthebladebolt
counterclockwise),savingallthemountinghardware.

5.Installthenewblade(turnthebladeboltclockwise)
andallmountinghardware(Figure24).

Figure24

Important:Positionthecurvedendsofthe

bladetopointtowardthemowerhousing.

6.Useatorquewrenchtotightenthebladeboltto
60ft-lb(82N⋅ ⋅⋅m).

Important:Abolttorquedto60ft-lb(82N⋅ ⋅⋅m)
isverytight.Whileholdingthebladewitha
blockofwood,putyourweightbehindthe
ratchetorwrenchandtightentheboltsecurely.
Thisboltisverydifculttoovertighten.

13

AdjustingtheSelf-propelDrive
Cable

Self-propelmodelsonly

Wheneveryouinstallanewself-propelcableorif
theself-propeldriveisoutofadjustment,adjustthe
self-propeldrivecable.

1.Loosenthecablesupportnut(Figure25).

Figure25

1.1to1-1/2inches(25to38
mm)

4.Cablesupportnut

2.Self-propeldrivebar5.Cablesupport

3.Cablejacket

2.Holdtheself-propelbail1to1-1/2inches(25to38
mm)fromthehandle(Figure25).

3.Pulldownthecablejacket(towardthemower)until
thereisnoslackinthecable(Figure25).

4.Tightenthenutonthecablesupport.

5.Releasetheself-propeldrivebarandensurethatthe
cableisloose.

Note:Thecablemustbeloosewiththeself-propel
drivebarinthereleasedposition;otherwise,the
mowermaycreepwhenthebarisdisengaged.

CleaningtheMower

ServiceInterval:Beforeeachuseordaily

Themowermaydislodgematerialfromunder
themowerhousing.

•Weareyeprotection.

•Stayintheoperatingposition(behindthe
handle).

•Donotallowbystandersinthearea.

1.Withtheenginerunningonaatpavedsurface,
sprayastreamofwaterinfrontoftherightrear
wheel(Figure26).

Thewaterwillsplashintothepathoftheblade,
cleaningouttheclippings.

Figure26

2.Whennomoreclippingscomeout,stopthewater
andmovethemowertoadryarea.

3.Runtheengineforafewminutestodrythehousing
topreventitfromrusting.

14

Storage

Storethemowerinacool,clean,dryplace.

PreparingtheMowerfor
Storage

Gasolinevaporscanexplode.

•Donotstoregasolinemorethan30days.

•Donotstorethemowerinanenclosurenear
anopename.

•Allowtheenginetocoolbeforestoringit.

1.Onthelastrefuelingoftheyear,addfuelstabilizer
tothefuelasdirectedbytheenginemanufacturer.

2.Runthemoweruntiltheenginestopsfromrunning
outoffuel.

3.Primetheengineandstartitagain.

4.Allowtheenginetorununtilitstops.Whenyoucan
nolongerstarttheengine,itissufcientlydry.

5.Disconnectthewirefromthesparkplugandconnect
thewireontotheretainingpost.

6.Removethesparkplug,add1oz.(30ml)ofoil
throughthesparkplughole,andpullthestarterrope
slowlyseveraltimestodistributeoilthroughoutthe
cylindertopreventcylindercorrosionduringthe
off-season.

7.Looselyinstallthesparkplug.

8.Tightenallnuts,bolts,andscrews.

9.Chargethebatteryfor24hours,thenunplugthe
batterychargeranstorethemowerinanunheated
area.Ifyoumuststorethemowerinaheated
area,youmustchargethebatteryevery90days
(electric-startmodelsonly).

FoldingtheHandle

Foldingorunfoldingthehandleimproperlycan
damagethecables,causinganunsafeoperating
condition.

•Donotdamagethecableswhenfoldingor
unfoldingthehandle.

•Ifacableisdamaged,contactanAuthorized
ServiceDealer.

1.Loosenthehandleknobsuntilyoucanmovethe
handlefreely(Figure27).

Figure27

1.Handleknob(2)

2.MovethehandleforwardasshowninFigure27.

RemovingtheMowerfrom
Storage

1.Removethesparkplugandspintheenginerapidly
usingthestartertoblowtheexcessoilfromthe
cylinder.

2.Installthesparkplugandtightenitwithatorque
wrenchto15ft-lb(20N⋅m).

3.Chargethebatteryfor24hours(electric-startmodels
only).

4.Connectthewiretothesparkplug.

15

TheLawn-BoyNo-WorryWarranty

ATwo-YearFullWarranty(45dayLimitedWarrantyforCommercialUse)

AThree-YearPowerTrainFullWarrantyforResidentialUse(LimitedWarrantyforCommercialuse)

20in.
Mulching/
RearBagging
LawnMower

TheLawn-BoyTru-StartCommitment

AThree-YearFullWarranty(NotapplicableforCommercialUse)

ConditionsandProductsCovered

undertheNo-WorryWarranty

Lawn-Boy®Inc.anditsafliate,Lawn-BoyWarrantyCompany ,pursuant
toanagreementbetweenthem,jointlypromisetorepairanyLawn-Boy
Productusedforresidentialpurposes*,ifdefectiveinmaterialsor
workmanshiporifitstopsfunctioningduetothefailureofacomponent
fortheperiodslistedbelow.

ThisWarrantyappliestoall20in.Lawn-Boylawnmowersandtheir
accessories.Thiswarrantycoversthecostofpartsandlabor ,butyou
mustpaytransportationcosts.

Thefollowingtimeperiodsapplyfromthedateofpurchase:

ProductsWarrantyPeriod

ProductandAttachments

2yearfullwarranty
PowerTrain**(EngineandTransmission)3yearfullwarranty
Batteries1year
WearItems(Belts,blades,bladeadaptors,
grassbags,cables,andwheels)

90days

LimitedWarranty

undertheNo-WorryWarrantyforCommercialUse

Gas-poweredLawn-BoyProductsusedatmorethanonelocation,orused
forinstitutionalorrentaluse,arewarrantedfor45daysagainstdefects
inmaterialsorworkmanship.Componentsfailingduetonormalwear
arenotcoveredbythiswarranty .

CoverageundertheTru-StartCommitment

Lawn-Boy®Inc.anditsafliate,Lawn-BoyWarrantyCompany ,pursuant
toanagreementbetweenthem,jointlypromisethatyourTru-Startengine,
whenusedforresidentialpurposes*,willstartontherstorsecondpull
forthree(3)yearsfromthedateofpurchase,ifyouprovidetheroutine
maintenanceitrequires,orwewillxitfreeofcharge.

ThisWarrantyappliestoall20in.Lawn-Boylawnmowers.Thiswarranty
coversthecostofpartsandlabor ,butyoumustpaytransportationcosts.

ThisLawn-BoyCommitmentdoesnotapplywhentheproductisused
commercially.*

Thefollowingappliestoboth

theNo-WorryWarrantyandtheTru-StartCommitment

OwnerResponsibilities

YoumustmaintainyourLawn-BoyProductbyfollowingthemaintenance
proceduresdescribedintheOperator’sManual.Suchroutine
maintenance,whetherperformedbyadealerorbyyou,isatyourexpense.

ItemsandConditionsNotCovered

Thereisnootherexpresswarrantyexceptforspecialemissionsystem
coverageonsomeproducts.Thisexpresswarrantydoesnotcoverthe
following:

•Costofregularmaintenanceserviceorparts,suchaslters,fuel,

lubricants,oilchanges,sparkplugs,airlters,bladesharpening/worn
bladeonmowers,cable/linkageadjustments,orbrakeandclutch
adjustments

•Anyproductorpartwhichhasbeenalteredormisusedandrequires

replacementorrepairduetoaccidentsorlackofpropermaintenance

•Repairsnecessaryduetoimproperbatterycare,failuretousefresh

fuel(lessthanonemonthold),orfailuretoproperlypreparetheunit
priortoanyperiodofnon-useoveronemonth

•Pickupanddeliverycharges

•Operationalmisuse,neglect,oraccidents

•RepairsorattemptedrepairsbyanyoneotherthananAuthorized

Lawn-BoyServiceDealer

•Repairsoradjustmentstocorrectstartingdifcultiesduetothe

following:

–Failuretofollowpropermaintenanceprocedures

–Rotarymowerbladestrikinganobject

–Contaminantsinthefuelsystem

–Improperfuel(consultyourOperator’sManualifindoubt)

–Failuretodrainthefuelsystempriortoanyperiodofnon-use

overonemonth

•Specialoperationalconditionswherestartingmayrequiremorethan

twopulls:

–Firsttimestartsafterextendedperiodofnon-useoveronemonth

orseasonalstorage

–Cooltemperaturestartssuchasthosefoundinearlyspringand

lateautumn

–Improperstartingprocedure

Ifyouarehavingdifcultystartingyourunit,pleasechecktheOperator’s
Manualtoensurethatyouareusingthecorrectstartingprocedures.This
cansaveanunnecessaryvisittoaServiceDealer.

InstructionsforObtainingWarrantyService

IfyouthinkthatyourLawn-BoyProductcontainsadefectinmaterialsor
workmanship,orifanormal,able-bodiedadultcannolongerstartyour
product’sengineinoneortwopulls,followthisprocedure:

1.ContactanyAuthorizedLawn-BoyServiceDealertoarrangeservice
attheirdealership.T olocateadealerconvenienttoyou,referto
theYellowPagesofyourtelephonedirectory(lookunder“Lawn
Mowers”)oraccessourwebsiteatwww.Lawn-Boy .com.Youmay
alsocallthenumberslistedinitem#3tousethe24-hourLawn-Boy
Dealerlocatorsystem.

2.Bringtheproductandyourproofofpurchase(salesreceipt)tothe
ServiceDealer.Thedealerwilldiagnosetheproblemanddetermine
ifitiscoveredunderwarranty .

3.IfforanyreasonyouaredissatisedwiththeServiceDealer’s
analysisorwiththeassistanceprovided,contactusat:Customer
CareDepartment,ConsumerDivision,Lawn-BoyWarrantyCompany ,
811 1LyndaleAvenueSouth,Bloomington,MN55420-1 196;orcall
ustollfreeat866-216-6032(U.S.customers)or866-216-6031
(Canadiancustomers).

GeneralConditions

Allrepairscoveredbythesewarrantiesmustbeperformedbyan
AuthorizedLawn-BoyServiceDealerusingLawn-Boyapproved
replacementparts.

NeitherLawn-Boy®Inc.norLawn-BoyWarrantyCompanyisliable
forindirect,incidental,orconsequentialdamagesinconnectionwith
theuseoftheLawn-BoyProductscoveredbythesewarranties,
includinganycostorexpenseofprovidingsubstituteequipment
orserviceduringreasonableperiodsofmalfunctionornon-use
pendingcompletionofrepairsunderthesewarranties.

Somestatesdonotallowexclusionsofincidentalorconsequential
damages,sotheaboveexclusionsmaynotapplytoyou.

Thiswarrantygivesyouspeciclegalrights,andyoumayalsohaveother
rightswhichvaryfromstatetostate.

CountriesOtherthantheUnitedStatesorCanada

CustomerswhohavepurchasedLawn-BoyproductsexportedfromtheUnitedStatesorCanadashouldcontacttheirLawn-BoyDistributor(Dealer)
toobtainguaranteepoliciesforyourcountry ,province,orstate.IfforanyreasonyouaredissatisedwithyourDistributor’sserviceorhavedifculty
obtainingguaranteeinformation,contacttheLawn-Boyimporter.Ifallotherremediesfail,youmaycontactusatLawn-BoyWarrantyCompany .

*Residentialpurposesmeansuseoftheproductonthesamelotasyourhome.Useatmorethanonelocation,orinstitutionalorrentaluse,isconsidered
commercialuseandthecommercialusewarrantywouldapply .
**PowerTraincoverageincludesengineandtransmissiononly.Thetransmissionisdenedasthegearcase,internalcomponents,andaxles.

374-0256RevB