MTD 11B 439Q755 User Manual LAWN MOWER Manuals And Guides 1108108L

User Manual: MTD 11B-439Q755 11B-439Q755 MTD LAWN MOWER - Manuals and Guides View the owners manual for your MTD LAWN MOWER #11B439Q755. Home:Lawn & Garden Parts:MTD Parts:MTD LAWN MOWER Manual

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Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty

21=inch Rotary Mower-

Model Series 430

iMPORTANT
READ SAFETY

RULES AND iNSTRUCTiONS

CAREFULLY

BEFORE

OPERATION

Warning: This unit is equippedwithan internalcombustionengineand shouldnot be usedon or nearany unimprovedforest-covered,brushcoveredor grass-coveredland unlesstheengine'sexhaustsystemis equippedwith a sparkarrestermeetingapplicablelocalor statelaws(if any).
If a sparkarresteris used,it shouldbe maintainedin effectiveworkingorder by the operator.In theState of Californiathe aboveis requiredbylaw
(Section4442 of the CaliforniaPublicResourcesCode). Otherstatesmay havesimilarlaws.Federallaws applyon federallands.A sparkarrester
for the muffleris availablethroughyour nearestengineauthorizedservicedealeror contactthe servicedepartment,RO. Box361131Cleveland,
Ohio 44136-0019.

PRINTEDIN U.S.A.

MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019

FORMNO.769-01638C
10/12/2006

This Operator's Manual is an important part of your new lawn mower, it will help you assemble,
prepare and maintain the unit for best performance.
Please read and understand what it says.

Table of Contents
Slope Gauge ........................................................
Safe Operation Practices ...................................
Setup and Adjustment .......................................
Operating Your Lawn Mower ..............................
Maintaining Your Lawn Mower .........................

3
4
6
8
10

Troubleshooting ................................................
Safety Labels ....................................................
Parts List ...........................................................
Warranty .............................................

12
13
14

Back Cover

MTDLLCreservesthe rightto changeproductspecifications,designs,and equipmentwithoutnoticeand withoutincurring
obligation.

Finding and Recording Model Number
BEFOREYOU BEGINTO ASSEMBLEYOUR NEW

EQUIPMENT,pleaselocate the model plateon the
equipmentand copy the information
to the sample
model plateprovidedto the right. You can locate the
model plate by standing at the operatingposition and
lookingdown at the rear of the deck. This information
will be necessaryto use the manufacturer'sweb
site, to obtain assistancefrom the CustomerSupport Department,or when contactingan authorized
service dealer.

Model Number

Serial Number

MTD LLC
P.O. BOX
CLEVELAND,
330-220-4683
, www.mtdproducts.com

361131
OH 44136

800-800-731

Customer Support
Please do NOTreturn
purchased,

without

the unit to the retailer from
first

contacting

Customer

which it was
Support.

If you havedifficulty assemblingthis productor have any questionsregardingthe controls,operation,or
maintenanceof this unit, you can seek help from the experts. Choosefrom the options below:
= Visit www.mtdproducts.com
• Call a CustomerSupport Representativeat 1-800-800-7310.
• The engine manufacturer is responsiblefor all engine-relatedissueswith regardsto performance,powerrating,specifications,warrantyand service. Please refer to the enginemanufacturer'sOwner's/Operator's
Manual,packedseparatelywith your unit, for more information.

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WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to State of Californiato cause cancer and
birth defects or other reproductiveharm.
DANGER: This machine was built to be operated according to the rules for safe operation in this
manual. As with any type of powerequipment, carelessness or error on the part of the operator
can result in serious injury. This machine is capable of amputating hands and feet and throwing
objects. Failure to observe the following safety instructions could result in serious injury or death.

Children

WARNING
This symbol points
out importantsafety
instructionswhich, if
not followed,could
endangerthe personal
i safety and/or property
I ofyourselfand others.
Read and follow all
instructionsin this
manual beforeattemptingto operate
i this machine. Failure
I to complywith these
instructionsmay result
i in personalinjury.When
you see this symbol.
i HEED ITS WARNING!

i Your Responsibility
Restrict the use
of this power machine
to personswho read.
i understand
and follow the warnings
and instructions
I.
=nthis manual
and on the machine.

Tragicaccidentscan occur if operatoris not alert to presence
of children.Childrenare oftenattractedto mowerand mowing
activity.Theydo not understandthe dangers.Neverassume
thatchildrenwill remainwhereyou lastsawthem.
1. Keepchildrenout of the mowingareaand underwatchful
careof a responsibleadultotherthanthe operator.
2. Be alert andturn moweroff if a childentersthe area.
3. Beforeand whilemovingbackwards,look behindanddown
forsmallchildren.
4. Useextremecare when approachingblind corners,
doorways,shrubs,trees,or otherobjectsthat may obscure
yourvisionof a child whomay run intothe mower.
5. Keepchildrenawayfrom hot or runningengines.Theycan
sufferburnsfrom a hot muffler.
6. Neverallowchildrenunder14 yearsoldto operatea power
mower.Children14 yearsoldand overshouldreadand
understandoperationinstructionsandsafetyrulesinthis
manualandshouldbe trainedandsupervisedbya parent.

General Operation
1. Readthis operator'smanualcarefullyin its entiretybefore
attemptingto assemblethis machine.Read,understand,
andfollowall instructionson the machineandin the
manual(s)beforeoperation.Be completelyfamiliar with
the controls andthe proper useof this machinebefore
operatingit. Keepthis manualin a safe place forfuture
and regularreferenceand for orderingreplacementparts.
2. This machineis a precision pieceof powerequipment,
not a plaything.Therefore,exerciseextremecautionat all
times.Yourunit has beendesignedto performonejob: to
mowgrass. Do not use it for any otherpurpose.
3. Neverallow childrenunder 14yearsold to operatethis
machine.Children 14yearsold and overshould readand
understandthe instructionsinthis manualandshould
be trainedand supervisedby a parent.Onlyresponsible
individualswho arefamiliar withthese rulesof safe
operationshould be allowedto usethis machine.
4. Thoroughlyinspectthe area wherethe equipmentis to
be used. Removeall stones,sticks,wire, bones,toys
andotherforeignobjects, whichcould be trippedover or
picked up andthrown bythe blade.Thrownobjects can
causeseriouspersonalinjury.Plan your mowingpattern
to avoid dischargeof materialtoward roads,sidewalks,
bystandersandthe like.Also,avoid dischargingmaterial
againsta wall or obstruction,whichmay causedischarged
materialto ricochetback towardthe operator.
5. Tohelp avoid bladecontact or a thrown objectinjury,
stay inoperatorzone behindhandlesand keepchildren,
bystanders,helpersand pets at least 75 feetfrom mower
whileit is inoperation.Stop machineif anyoneenters
area.

6. Alwayswearsafetyglasses or safetygogglesduringoperation andwhile performingan adjustmentor repairto protect
youreyes. Thrownobjectswhich ricochetcan causeserious
injury to the eyes.
7. Wearsturdy, rough-soledworkshoesand close-fitting
slacksandshirts. Shirtsand pantsthatcoverthe arms and
legs andsteel-toedshoesare recommended.Neveroperate
this machinein bare feet,sandals, slipperyor light-weight
(e.g. canvas)shoes.
8. Do not put hands or feet near rotatingparts or undercutting
deck. Contactwithblade can amputatehands andfeet.
9. A missingor damageddischargecovercan cause blade
contactor thrownobject injuries.
10. Manyinjuriesoccuras a resultof the mowerbeing pulled
overthe foot duringa fall causedby slippingor tripping.
Do not hold on to the mower if you are falling; releasethe
handle immediately.
11. Neverpullthe mowerback towardyou whileyou are
walking.If you must backthe mowerawayfrom a wall or
obstructionfirst look down and behindto avoid trippingand
thenfollowthese steps:
a. Stepback from mowerto fully extend yourarms.
b. Be sure youare well balancedwithsurefooting.
c. Pullthe mowerback slowly,no morethan half way
toward you.
d. Repeatthesesteps as needed.
12. Do not operatethe mowerwhileunderthe influenceof
alcoholor drugs.
13. Do not engagethe self-propelledmechanismon unitsso
equippedwhilestartingengine.
14. The bladecontrol handle is a safetydevice.Neverattempt
to bypassits operation.Doingso makesthe safetydevice
inoperativeandmay result in personalinjurythrough
contactwiththe rotatingblade. The bladecontrol handle
mustoperateeasily in bothdirectionsandautomatically
returnto the disengagedpositionwhen released.
15. Neveroperate the mowerinwet grass. Alwaysbe sure of
yourfooting. A slip and fall can causeseriouspersonal
injury.If you feel you are losing yourfooting,releasethe
bladecontrol handle immediatelyand the bladewill stop
rotatingwithinthreeseconds.
16. Mowonly in daylightor good artificial light. Walk,never run.
17. Stopthe bladewhen crossinggraveldrives, walksor roads.
18. If the equipmentshouldstartto vibrateabnormally,stop the
engineand check immediatelyfor the cause.Vibrationis
generallya warningof trouble.

19.Shutthe engine off and waituntil the bladecomesto a
completestop beforeremovingthe grasscatcheror unclogging the chute.
The cutting bladecontinuesto rotatefora few secondsafter
the engine is shut off. Neverplace any partof the body in
the bladearea until you are surethe bladehas stopped
rotating.
20. Neveroperate mowerwithoutpropertrail shield, discharge
cover,grasscatcher,bladecontrol handle or othersafety
protectivedevices in placeand working.Neveroperate
mowerwith damagedsafetydevices.Failureto do so can
result in personalinjury.
21. Mufflerand engine becomehot andcan causea burn.Do
not touch.

6. Extinguishall cigarettes,cigars, pipesand othersources
of ignition.
7. Neverfuel machineindoorbecauseflammablevapors will
accumulatein the area.
8. Neverremovegas cap or add fuel whileengine is hot or
running. Allow engineto cool at least two minutesbefore
refueling.
9. Neveroverfill fuel tank. Filltank to no morethan Y2inch
below bottomof filler neckto providefor fuel expansion.
10. Replacegasoline cap andtighten securely.
11. If gasolineis spilled,wipe it off the engine and equipment.
Moveunit to another area.Wait 5 minutesbeforestarting
engine.
12. Neverstorethe machineor fuel containernear an open
flame,sparkor pilot light as on a water heater,space
heater,furnace, clothesdryeror othergas appliances.
13. Toreducefire hazard,keepmowerfree of grass, leaves,
or other debrisbuild-up.Clean up oil or fuel spillage and
removeany fuel soakeddebris.
14. Allow a mowerto cool at least5 minutesbeforestoring.

22. Only use parts andaccessoriesmade forthis machineby
manufacturer.Failureto do so can resultin personalinjury.
23. Ifsituationsoccur whichare not coveredinthis manual,
use care and goodjudgment.Contactyour dealerfor
assistance.

Slope Operation

Practices

General Service:

Slopesare a majorfactor relatedto slip andfall accidents,which
can result insevereinjury.Operationon slopes requiresextra
caution.If youfeel uneasyon a slope,do not mowit. Foryour
safety,use the slope gaugeincludedas part of this manualto
measureslopes beforeoperatingthis uniton a slopedor hilly
area.Ifthe slope is greaterthan 15 degrees,do not mow it.

1. Neverrun an engine indoorsor in a poorlyventilatedarea.
Engineexhaustcontainscarbonmonoxide,an odorless
anddeadlygas.
2. Beforecleaning,repairing,or inspecting,makecertainthe
bladeandall movingparts havestopped.Disconnectthe
sparkplug wire andgroundagainstthe engineto prevent
unintendedstarting.
3. Checkthe bladeandengine mountingbolts atfrequent
intervalsfor propertightness.Also,visuallyinspectblade
fordamage(e.g.,bent,cracked,worn) Replacebladewith
the originalequipmentmanufacture's(O.E.M.)bladeonly,
listedin this manual."Useof partswhichdo not meetthe
originalequipmentspecificationsmay leadto improper
performanceand compromisesafety!"
4. Mowerbladesare sharp andcan cut.Wrap the bladeor
weargloves,anduse extracautionwhen servicingthem.
5. Keepall nuts,bolts, andscrewstight to be surethe equipmentis insafe workingcondition.
6. Nevertamperwithsafetydevices.Checktheir proper
operationregularly.
7. After strikinga foreignobject,stop the engine,disconnect the sparkplug wire andgroundagainstthe engine.
Thoroughlyinspectthe mowerfor any damage.Repairthe
damagebeforestartingandoperatingthe mower.
8. Neverattemptto makea wheel or cuttingheightadjustmentwhilethe engine is running.
9. Grasscatchercomponents,dischargecover,andtrail
shield aresubjectto wear anddamagewhichcould
exposemovingparts or allowobjectsto be thrown.For
safetyprotection,frequentlycheck componentsand replace immediatelywithoriginal equipmentmanufacturer's
(O.E.M.)parts only, listedin this manual."Use of parts
whichdo not meetthe originalequipmentspecifications
may lead to improperperformanceand compromise
safety!"
10. Do not changethe enginegovernorsettingor over-revthe
engine.The governorcontrolsthe maximumsafe operating
speedof the engine.
11. Maintainor replacesafetylabels,as necessary.
12. Observeproperdisposallawsand regulations.Improper
disposalof fluidsand materialscan harmthe environment.

Do:
1. Mow acrossthe face of slopes;neverupand down.Exercise
extremecautionwhen changingdirectionon slopes.
2. Watchfor holes,ruts, rocks,hidden objects,or bumps
which can causeyouto slip or trip. Tallgrasscan hide
obstacles.
3. Alwaysbe sure of yourfooting.A slip and fallcan cause
serious personalinjury.If youfeel you are losingyour
balance,releasethe bladecontrol handle immediately,and
the bladewill stop rotatingwithin3 seconds.

Do Not:
1. Do not mow near drop-offs,ditchesor embankments,you
could loseyourfooting or balance.
2. Do not mow slopes greaterthan 15degreesas shown on
the slope gauge.
3. Do not mow on wet grass. Unstablefooting could cause
slipping.

Service
Safe Handling Of Gasoline:
1. Toavoid personalinjury or propertydamageuse extreme
care in handlinggasoline. Gasolineis extremelyflammable
and the vapors are explosive.Serious personalinjury can
occur when gasolineis spilled on yourselfor your clothes,
which can ignite.Washyourskin andchangeclothes
immediately.
2. Use onlyan approvedgasolinecontainer.
3. Neverfill containersinside a vehicleor on a truck or trailer
bed witha plasticliner.Alwaysplacecontainerson the
ground awayfrom yourvehicle beforefilling.
4. Removegas-poweredequipmentfrom the truckor trailer
and refuel it on the ground. If this is not possible,then refuel
such equipmenton atrailer witha portable container,rather
than from a gasolinedispensernozzle.
5. Keepthe nozzle in contactwiththe rim of the fuel tank or
containeropeningat all times untilfueling is complete.Do
not use a nozzle lock-opendevice.

WARNING
This symbol points
out important safety
instructions, which if
not followed, could
endangerthe personal
safety and/or property
of yourselfand others.
Read and follow all
instructions in this manual before attempting to
operate this machine.
Failureto comply with
these instructions may
result in personal injury.
When you see this
symbol.
HEED

iT'S WARNING!

Your Responsibility
Restrictthe use
of this power machine
to persons who read.
understand
and follow the warnings
and instructions
in this manua
and on the machine.

This OperatorsManualcoversa rangeof product
specificationsfor variousmodels.Characteristicsand featuresdiscussedand/orillustratedin this manualmay not
be applicableto all models.MTDLLCreservesthe right
to changeproductspecifications,designs,and equipment
withoutnotice and withoutincurringobligation.
1. Removeanypackingmaterialwhich may be between
upperand lowerhandles.
a. Pull up and backon upperhandleas shownin
Figure3-1.Makecertain the lowerhandleis seated
securelyintothe handle mountingbrackets.
b. Tightenstar knobssecuringupperhandleto lower
handle,Figure3-1.Makesurethat eachcarriage
bolt is seatedproperlyin the handle.
2. Locatethe hairpinclipon the weldpin on eachside
lowerhandle.

Handle MountingB

NOTE:ThisOperatorls
ManUal
COvers
severaimodelSl
Lawn
Mowerfeatures
varyby
model: Notallfeatures
discussed
(orengines
piCtured)
in thismanual
are aPpliCable
toall

Figure3-1:Unfoldhandleandtightenhardware.

b. Inserta carriagebolt fromthe hardwarepack into
the upperhole on the handle mountingbracket,
Figure3-2.Securewith one plasticwing nut, also
includedthe hardwarepack.Repeaton otherside.
.

i NOTE:Standbehind
i themoweras ifyou
: weregoingtooperate
i it.Yourrighthandcorresponds
totheright
sideofthemower;your
lefthandcorresponds
totheleftsideofthe
mower.

Removehairpinclipfrom this hole.Usinga pair
of pliers,insert hairpinclip into the holeon pin
closestto the bracket,Figure3-2. Repeaton other
side.

The ropeguide is attachedto the right sideof the
upperhandle.Loosenthe wingnut which securesthe
rope guide,Figure3-3.
a. Holdblade controlhandleagainstupper handle.
b. Pull starterropeout of the engine.Releaseblade
controlhandle.
c. Slip starterrope into ropeguide.
d. Tightenwingnut.

Figure3-2:Securelowerhandleto mountingbrackets.

Insertpost on cable ties intoholes providedon the
lowerhandle.Pull cabletie tight and trim excess,
Figure3-4.

NOTE:Yourmower
i isshippedwiththe
handleinthehigher
i heightposition.
iMPORTANT
Thisunitisshipped
withoutgasolineor
oilintheengine.Fil
upgasoline
andoil
asinstructed
inthe
accompanying
engine
manualBEFORE
operating
yourmower.
Figure3-3: Pullrecoilstarterthrough ropeguide andtighten.

Figure3-4:Securecableto handle usingcableties.

5. Followstepsbelowto assemblethe grasscatcher

(if needed).Makecertain bag is turnedrightside
out beforeassembling(warninglabelwill be on the
outside).
a. Placebag overframe sothat its black plasticside
is at the bottom.
b. Slip plasticchannelof grass bagoverhooks on the
frame,Figure3-5.All the plasticchannelsexcept
centertop of bag attachfrom outsideof bag.
c. Attachcentertop of bag from insideof bag.
6. Followstepsbelowto attachthe grass catcher:
a. Lift rear dischargedoor.
b. Placegrass catcheron thepivot rod. Letgo
of dischargedoor sothat it restson thegrass
catcher,Figure3-6.
Figure3-5:Assemble
thegrasscatcher.

7. Yourmoweris shippedas a mulcher.Toconvertto
side discharge,makesuregrasscatcheris off of the
unit and rear dischargedoor is closed.
a. On the sideof the mower,lift the mulchingplug.
b. Slide chute hooksunder hingepin on mulching
plug assembly.Lowerside mulchingplug,Figure
3-7.Do not removesidemulchingplugat anytime,
evenwhenyou are not mulching.
_

WARNING: Neveroperate mowerunless the
hookson the grass catcherare firmly seated
on the pivotrod and the rear dischargedoor rests
firmly against top of the grass catcher.

Adjustments
An adjustingplateand thumb leverat each wheel
providescuttingheightadjustment.
1. Depresslevertowardswheel.
2. Moveitto anyone of the positionsfordesiredcutting
height, Figure3-8. Makesurethat eachwheelis
positionedat the sameheight.

Figure3-6:Attachthe grasscatcher.

3. Releaselevertowardsmowerdeck.
f

Fig

Figure3-7:Liftmulchplugandinstallsidedischarge
chute.
7

CUTTING HEIGHT:
All wheels must be
positioned at the same
height.

Know Your Lawn Mower
Blade Control

You r LaWn

Mowe

RecoilStarter_

GrassCatcher

:WARN

ING

The blade control
is a safety device.
DO NOT bypass its
operations.
Use extreme care
when handling
gasoline. Gasoline is
extremely flammable
and the vapors are
explosive. Never fuel
i the machine indoors
i

CuttingHeightAdjustment
Levers(front and rear,for
eachwheel)

or whilethe engine
is hotor running.
Extinguishcigarettes,
cigars, pipes and
other sources of
ignition.

i
i Keep handsand feet
away fromthechute
i areaon cutting
deck.
Refer to warning
labelon theunit.

Mulch Plug
Side DischargeChute_

Figure4-1:The maincomponentson the mower.(Model435Ashown)

Now thatyou havesetupyour lawnmower,its importantto becomeacquaintedwith its controlsand features.

Blade Control

Recoil Starter

Theblade controlis attachedto the upperhandleof
the mower.Depressand squeezeit againstthe upper
handleto operatethe unit. Releaseit to stop engineand
blade.

The recoilstarteris attachedto the rightupper handle.
Standbehindthe unitand pullthe recoilstarterropeto
startthe unit.

Gas and Oil Fill-Up
Refer to the enginemanualfor instructions.

WARNING:
Thisblade
control
isa
device.
Never
attempt to
bypass
itssafety
operalions.

1. Checkoil leveland add oil if necessary.Followengine
manualfor this.

Cutting Height Adjustment Levers

2. Servicethe enginewith gasolineas instructedin the
enginemanual.

One adjustmentleveris locatedat eachwheeland is
usedto adjustthe cuttingheight.All fourwheelsmust
be positionedat the sameheightto ensurea uniform
cut.

care
handling
_l_il&WARNING: Useextreme
when
gasoline.
Gasoline
isextremely
flammable
andthevaporsareexplosive.
Neverfuel
themachine
indoors
orwhiletheengineishotorrunning.
Extinguishcigarettes,
cigars,
pipesandothersourcesof
ignition.

Mulch Plug
Themulch plug is usedonly for mulchingpurposes.
Insteadof collectingthe grassclippings in a grass
catcher,some mowermodelshavethe optionof
recirculatingthe clippingsback to the lawn.This is
calledmulching.

Starting Engine
_

ARNING:Be sure no one otherthan the
operatorisstanding near the lawn mower
while starting engine or operatingmower. Never
run engineindoorsor in enclosed,poorly ventilated
areas. Engine exhaust contains carbon monoxide, an
odorless and deadly gas. Keep hands, feet, hair and
looseclothing away from any moving partson engine
and lawn mower.

Your Lawn

Follow the set of instructionspertainingto your unit.
Refer to engine manual for help with the engine.

Briggs

& Stratton/Tecumseh

Engine:

1. Pushprimerthreetimes.Wait abouttwo seconds
betweeneachpush, Figure4-2. In temperature
around550F or below,primefive times.Do not prime
to restarta warm engine.

Figure4-2:Startingthe Briggs& Strattonengine.

2. Standingbehindthe mower,squeezethe bladecontrol
againstupper handle,Figure4-2.

WARNING

3. Holdingthesetwo handlestogetherfirmly,grasp recoil
starterhandleand pull ropeout with a rapid,continuous, full arm stroke,Figure4-2. Keepinga firm grip on
the starterhandle,letthe roperewindslowly.Repeat
until enginecranks.Letthe rope rewindeachtime
slowly.

Honda

The operationof any lawn
mower can result in foreign
objectsbeing thrown into
the eyes, which can damage
your eyes severely. Always
wear safety glasseswhile
operatingthe mower or
while performingany
adjustments or repairs on it.

Engine:

1. Placethe fuel valveleverfoundon the left sideof the
engine intothe ON (OPEN)position,Figure4-3.
2. Movethechoke leverall the way backwardintothe
choke position.
3. Standingbehindthe mower,squeezethe bladecontrol
againstupper handle,Figure4-3.The chokewill now
begin to slowlyreturnto the off chokepositionafter
activatingthe bladecontrol.Therefore,quicklymove
Figure4-3:Startingthe Hondaengine.
onto stepfour below.
4. Holdingthesetwo handlestogetherfirmly,grasp recoil anydirectionand cause seriouspersonalinjuryto the
starterhandleand pull ropeout with a rapid,continu- operatorand others.
ous, full arm stroke,Figure4-3. Keepinga firm grip on
the starterhandlelet the rope rewindslowly.Repeat
until enginecranks.Letthe rope rewindeachtime
slowly.

ARNING:If you strike a foreign object,
stop the engine. Removewire from the
spark plug,thoroughly inspectmower for
any damage, and repair damage before restarting
and operating. Extensive vibration of mower during
operation is an indicationof damage. The unit
should be promptlyinspectedand repaired.

WARNING:Wait for the blade to stop completelybefore performingany work on the
mower or to removethe grass catcher.

Stopping Engine

Using as IVlulcher

1. Releasebladecontrol to stop theengineand blade.

Formulchinggrass,removethe grasscatcherand side
dischargechutefrom the mower.Foreffectivemulching,
do notcut wet grass.If the grass hasbeen allowedto
growin excessof fourinches,mulchingis not recommended.Usethe grass catcherto bag clippingsinstead.
UsingGrassCatcher
Youcan usethe grass catcherto collectclippingswhile
youare operatingthe mower.Referto setup sectionfor
instructionson attachingthe grasscatcher.

2. Disconnectsparkplug wirefrom spark plug and
groundagainstthe engine.

Using Your Lawn Mower
Be surelawnis clearof stones,sticks,wire,or other
objectswhich coulddamagelawnmoweror engine.
Such objectscouldbe accidentlythrownby the mowerin

Be sure no one other than
the operator is standing
near the lawn mower while
startingengineor operating
mower. Never run engine
indoors or in enclosed,
poorlyventilatedareas.
Engine exhaust contains
carbonmonoxide, an
odorless and deadly gas.
Keephands, feet, hair and
loose clothingaway from
any moving parts on engine
and lawn mower.

Never operate yourmower
withouteither the rear door
or the entiregrass catcher
assembly firmly secured.

Deck Care
Cleanundersideof the mowerdeck after eachuse to
preventbuild-upof grass clippingsor otherdebris.
1. Disconnectsparkplug wire. Draingasolinefrom lawn
mower,or placea pieceof plasticunderthe gas cap.
2. Tip mowersothat it restson the housing.Keepthe
sidewith the air cleanerfacingup. Hold mowerfirmly.

Your Lawn

_lb

ARNING:Never tip the mower more than 90°
in any direction and do not leavethe mower
tipped for any lengthof time. Oil can drain intothe
upper partof the engine causing a starting problem.

3. Scrapeand cleanthe undersideof the deck with a
suitabletool. Do notspraywith water.

General Recommendations

4. Putthe mowerback on its wheelson the ground,if
youhad putplasticunderthe gas capearlier,make
sureto removeit now.

• Alwaysobservesafetyruleswhen performing
anymaintenance.

Engine Care

Figure5-1:Areas of lubrication.

WARNING
Always stop engine,
disconnect spark
plug,

and ground

against engine before
performing any type o!
maintenance on your
machine.
Never tip the mower
more than 900 in

anyd rect and
on

A list of key enginemaintenancejobs requiredfor good
performanceby the moweris given below.Followthe
accompanyingengine manualfor a detailedlist and
instructions.

• Thewarrantyon this lawnmowerdoesnot cover
itemsthat havebeen subjectedto operatorabuse
or negligence.To receivefull valuefromwarranty,
operatormustmaintainthelawn moweras
instructedhere.

1. Maintainoil levelas instructedin enginemanual.

• Changingof engine-governedspeedwill void
enginewarranty.
• All adjustmentsshouldbe checkedat leastonce
eachseason.
• Periodicallycheckall fastenersand makesurethese
are tight.

notleavethemower

tipped

for any length

of time: Oil can drain
into the upper part of

WARNING:Alwaysstop engine,disconnect
sparkplug,and groundagainst engine
before performingany type of maintenance on your
machine.

Lubrication

NOTE:Wedo not recommendthe use of a pressure
washeror gardenhoseto cleanyour unit. Thesemay
causedamageto bearingsor the engine.The useof
waterwill resultin shortenedlife and reduceserviceability.

* Lubricatepivot pointson theblade controlat least
oncea seasonwith lightoil. The bladecontrol must
operatefreely in both directions.See Figure5-1.
,

Lubricatethe wheelsat least oncea seasonwith
lightoil (or motoroil). if wheelsare removedfor any
reason,lubricatesurfaceof the pivotarm and inner
surfaceof thewheelwith light oil. See Figure5-1.

Lubricatethe torsionspringand pivot pointon the
rear dischargedoor and side mulchplug periodically
with lightoil to preventrust.See Figure5-1.

Followtheaccompanyingengine manualfor lubrication scheduleand instructionfor engine lubrication.

pressure washer or

garden hoseto clean
your unit. These may
cause damage to beaF
ings; or the enginel The
used water Willresult

3. Cleansparkplug and resetthegap once a season.
Sparkplug replacementis recommendedat the start
of eachmowingseason.Checkenginemanualfor
correctplugtype and gap specifications.
4. Cleanengineregularlywith a cloth or brush. Keepthe
coolingsystem(blowerhousingarea) cleanto permit
properair circulation.Removeall grass,dirt and
combustibledebrisfrom mufflerarea.

startingproblem:

2. Serviceair cleanerevery25 hoursundernormal
conditions.Cleaneveryfew hoursunderextremely
dustyconditions.Poorengineperformanceand
floodingusuallyindicatesthat the air cleanershould
be serviced.Toservicethe air cleaner,referto the
enginemanual.

BladeCare

-._

ARNING:Whenremovingthe cuttingblade
for sharpening or replacement, protectyour
hands with a pairof heavy gloves or use a heavy rag
to hold the blade.

J
/

Periodicallyinspectthe bladeadapterfor cracks,
especiallyif youstrikea foreignobject. Replacewhen
necessary.Followthe stepsbelowfor blade service.
1. Disconnectsparkplug wirefrom spark plug.Turn
moweron its side makingsurethat the air filter and
the carburetorare up.

Maintaining
YourLaWn

2. Removethe boltand the bladebell supportwhich
hold the bladeand the bladeadapterto the engine
crankshaft.See Figure5-2.
3. Removebladeand adapterfromthe crankshaft.See
Figure5-2.

Figure5-2:Remove
thebolt,support,andadaptertoaccess
theblade.

4. The bladecan be sharpenedwith a fileor on a grinding wheel.Do notattemptto sharpenthe blade while
it is still on the mower.Whensharpeningthe blade,
followthe originalangle of grind.Grind eachcutting
edge equallyto keepthe bladebalanced.

WARNING
When removing the
cutting blade for
sharpening or replacement, protect your
hands with a pair of
heavy gloves or use a
heavy rag to hold the
blade.

5. Removebladefrom the adapterfor testingbalance.
Balancethe bladeon a roundshaftscrewdriverto
check. Removemetalfrom the heavysideuntil it
balancesevenly.

_ii

ARNING:An unbalanced bladewill cause
excessivevibration when rotating at high
speeds. It may cause damageto mower and could
break causing personalinjury.

6. Lubricatetheenginecrankshaftand the inner surface
of the blade adapterwith lightoil. Slide the blade
adapteronto the enginecrankshaft.
7. Placethe bladeon the adaptersuch that the side
of the blade marked"Bottom"(or with part number)
facesthe groundwhenthe moweris in theoperating
position.Makesurethat the blade is alignedand
seatedon the bladeadapterflanges.
8. Placeblade bell supporton the blade.Align notches
on the bladebell supportwith smallholesin blade.

Figure5-3:Removerearflap.

Off-Season Storage
Thefollowingstepsshouldbe takento prepareyour
lawnmowerfor storage.
• Cleanand lubricatemowerthoroughlyas described
in the lubricationinstructions.
• Do not usea pressurewasheror garden hoseto
cleanyourunit.
Referto engine manualforcorrectengine
storageinstructions.

9. Replacehex boltand tightenhex boltto torque:450
in. Ibs. rain.,600 in. Ibs.max.

Coat mower'scuttingblade with chassisgreaseto
preventrusting.

Toensuresafe operationof yourmower,periodically
checkthe blade boltfor correcttorque.

Storemowerin a dry, cleanarea. Donot storenext
to corrosivematerials,suchas fertilizer.

Replacing Rear Flap
1. To removerear flap, lift reardoor,and pressflap in on
eitherside to removefrom hole. See Figure5-3.
2. Removeflap fromoppositehole and replacewith new
flap in theoppositeorder and mannerof removal.

Whenstoringanytype of powerequipmentin a poorly
ventilatedor metal storageshed, careshouldbe taken
to rust-prooftheequipment.Usinga lightoil or silicone,
coat theequipment,especiallycablesand all moving
parts of yourlawnmowerbeforestorage.

An unbalanced blade
will cause excessive
vibration when rotatingat high speeds, it
may cause damage
to mower, and could
break causing personal injury.

Problem

Cause

Remedy

Eng=nefalls to start

Biadecontroldlsengaged.
21 spark plug Wiredisconnected.

1, Engagebladecontrol.
2, Connect wiretOspark plug.

Fue!tank empty 0r sta!e!ueL

Fil!tank with C!eanl!resh gaso!inel

Enginenot choked.
I

& ,Chokeengine as instructedinthe
Operatingyour Lawn Mower section,
5. Clean adjustgap orreplace.
61 clean fue!iinel

I
5. Faultyspark p!ug,
Blockedfuel iinel

i i i_iii

_i_'i__ii i/

7 EngineflOoded:
.

1. Sparkplug wire loose.
2. Blockedfuel lineor stale fuel.

1. Connect andtighten sparkplug wire.
2. Clean fuel line; fill tank withclean,
fresh gasoline.
3. Clear vent.
4. Drainfuel tank. Refillwithfresh fuel.

ii _i_

Enginerunserratic

3.
4.
5.
6.

Ventingas cap plugged.
Wateror dirt infuel system.
Dirtyair cleaner.
Carburetorout of adjustment.

watafewmnutestOrestart
not prime.

butdo

5. Referto engine manual.
6. Referto engine manual.
I

Eng ne overheats

1. Engineoil levellow.
2. Air flow restricted.
3. Car buretornot adjustedproperly.

1. Fillcrankcasewith proper oil.
2. Removeblowerhousingand clean.
3. Referto engine manual

Occasional skips
(hesitates) at high speed

1. Sparkplug gap too close.
2. Carburetoridlemixtureadjustment
improperlyset.

1. Adjustgap to .030-inch.
2. Referto engine manual.

Idles poorly

1. Sparkplug fouled, faulty or gaptoo wide.

1. Resetgapto .030-inchor replace
spark p ug.
2. Referto engine manual.
3. Referto engine manual•

For repairsbeyond

the minoradjustments
listedhere; contact
an authorized service

dealer'

2 Carburetorimproperlyadjusted
3. Dirtyair cleaner.
Excessive Vibration

Mower will not mulch grass
ii ii

_i i

iii

i !i_ ii

1. Cuttingbladeloose or unbalanced.

1. Tighten bladeandadapter.Balance
blade.

2. Bentcutting blade.

2. See an authorizedservicedealer.

1 Wetgrass•

1. Donot mowwhen grass is wet wait

2. Excessivelyhigh grass.

Uneven cut

3. Dullblade.
1. Wheelsnot positionedcorrectly.
2. Dull blade.

Subject to changewithout
notificationor obligation,
Images my not reflect your
exact model and are for
refe[ence purposes oniyl

until laterto cut.
2. Mowonce at a high cutting height,
then mowagainat desirecJheight or
makea narrowercurt ng path.
3. Sharpenor replaceblade.
1. Placeall four wheelsin same
heightposition.
2. Sharpenor replaceblade.

Safety Labels Found On Your Lawn Mower

Model Series 430

WGSBar

Fief.
No.

PartNo.

Description

Fief.
No.

PartNo.

Description

747-1161A

BladeControlHandle

787-01290

FrontAdjustmentPlate

749-1092A

UpperHandle

720-0426

AdjustmentLeverKnob

747-04080

GrassCatcherFrame

732-0404

SpringLeverAssembly

749-0928A

LowerHandle

736-0270

Bell Washer

720-0279

WingNut

734-04213

FrontWheel,7 x 1.8,K2 Bar

710-1205

RopeGuide

734-2004A

FrontWheel,8 x 2.125,Zag

710-1174

CarriageBolt ,5/16-18x 2

734-1988

FrontWheel,7 x 1.8,Bar

664-04027

Grass Bag- Yardman

710-1241

Screw,1/4-15x 1.000

746-1130

ControlCable40"

746-1137

ControlCable53"

664-04034A _ Grass Bag- Gray
9

720-04072

HandKnob

731-1506At

FrontCover

731-04525t

EngineShroud

726-0240

CableTie

731-05642

Trailshield

710-0703

CarriageBolt,I/4-20

732-0700

TrailshieldWire

631-04225

RearDischargeDoor

712-0397

WingNut, 1/4-20

736-0504t

WaveWasher

747-04587

RearDoorPivot Rod

17032A

DeflectorChuteAdaptor

732-04175

SpringLever

732-04090A TorsionSpring- RH

687-02071A PivotArmAssembly- RH

1.,800'800,7310

734-04215

RearWheel,8 x 1.8,K2 Bar

687-02070A* PivotArmAssembly- LH

orvisituson

734-2004A

RearWheel,8 x 2.125,Zag

710-1652

AB Screw

734-1987

RearWheel,8 x 1.8,Bar

712-04065

FlangeLockNut, 3/8-16

731-04150C RearBaffle

714-0104

HairpinClip

710-0599

Screw,1/4-20x.500

710-0654A

TT SeresScrew,3/8-16x 1.0

787-01279

Deck- 21"

687-02099A Ht.Adj. Assy.Front LH(7"wheel)

687-02055

HingedMulchPlugAssembly

687-02100A* Ht.Adj. Assy.Front RH (7"wheel)

782-5002B

FrontBaffle

687-02075A Ht.Adj. Assy.Front LH(8"wheel)

748-04082

BladeAdapter,25ramx2.15

687-02074A* Ht.Adj. Assy.Front RH(8"wheel)

748-0377C

BladeAdapter,#6 x 2.15

742-0741

MulchingBlade

710-1257

Hex Screw, 3/8-24 x 2.5

687-02270

RearHandleBracketAssy. - LH

687-02271"

RearHandleBracketAssy. - RH

732-1014

TorsionSpring

687-02076A PivotArm AssyRH (7"wheel)

731-04177

Side Chute

687-02077A* PivotArm AssyLH (7"wheel)

747-0710

HingePin

687-02077A PivotArm AssyRH (8" wheel)

738-0507B

ShoulderScrew

687-02076A* PivotArm AssyLH (8"wheel)

731-04859t

Bail Cover

736-0524B

731-0981At

HubCap

Blade BellSupport

t If Equipped
* Not Shown

This OperatorsManualmaycovera rangeof productspecificationsfor variousmodels.Characteristicsand features
discussedand/orillustratedin this manualmay not be applicableto all models.

orderrop aOO
¸

www,mtdproducts,corn

MANUFACTURER'S

LiMiTED WARRANTY

The limitedwarrantyset forth belowisgivenby MTDLLCwith respect
to newmerchandisepurchasedand usedin the UnitedStates,its
possessionsand territories.
"MTD"warrantsthis productagainstdefectsin materialand workmanshipfor a periodof two (2) years commencingon the date of original
purchaseand will, at its option,repairor replace,freeof charge,any
part foundto be defectiveinmaterialsor workmanship.This limitedwarranty shallonlyapply if this product hasbeen operatedand maintained
inaccordancewith the Operator'sManualfurnishedwith the product,
and has notbeen subjectto misuse,abuse,commercialuse, neglect,
accident,impropermaintenance,alteration,vandalism,theft, fire, water,
or damagebecauseof otherperil or naturaldisaster.Damageresulting
fromthe installationor useof any part, accessoryor attachmentnot
approvedby MTDfor use with the product(s)coveredbythis manual
willvoid yourwarrantyas to any resultingdamage.
Normalwearparts are warrantedto be free fromdefects in materialand
workmanshipfor a periodof thirty (30) days fromthe dateof purchase.
Normalwearparts include,butare notlimitedto itemssuch as: batteries,belts,blades,blade adapters,grass bags, riderdeck wheels,seats,
snowthrowerskid shoes,shaveplates,auger spiralrubberand tires.
HOW TO OBTAIN SERVICE: Warranty service is available, WITH
PROOF OF PURCHASE, through your local authorized service
dealer. To locate the dealer in your area, check your Yellow Pages,
or contact MTD LLC at RO. Box 361131,Cleveland, Ohio 441360019, or call 1-800-800-7310 or 1-330-220-4683 or log on to our
Web site at www.mtdproducts.com.
This limitedwarrantydoesnot providecoverageinthe followingcases:
a. Theengineor componentparts thereof.These itemsmaycarry a
separatemanufacturer'swarranty.Referto applicablemanufacturer's
warrantyfor termsand conditions.
b. Log splitterpumps,valves,and cylindershavea separateone year
warranty.
c. Routinemaintenanceitemssuch as lubricants,filters, blade
sharpening,tune-ups,brakeadjustments,clutchadjustments,deck
adjustments,and normaldeteriorationof the exteriorfinish due to
useor exposure.

FOR

e. MTDdoesnot extendanywarrantyfor productssoldor exported
outsideof the UnitedStates,its possessionsand territories,except
those soldthroughMTD'sauthorizedchannelsof export distribution.
f. Replacementparts that are notgenuine MTDparts.
g. Transportationchargesand servicecalls.
No impliedwarranty,includingany impliedwarranty of merchantabilityof fitness for a particular purpose,applies after the
applicable periodof express written warranty above as to the
parts as identified.No otherexpresswarranty, whetherwrittenor
oral, except as mentioned above, givenby any personor entity,
includinga dealeror retailer, with respect to any product,shall
bind MTD.Duringthe periodof the warranty,the exclusiveremedy
is repairor replacementof the productas set forth above.
The provisionsas set forth in this warrantyprovidethe sole and
exclusiveremedy arising from the sale. MTDshallnot be liable
for incidentalor consequentialloss or damage including,without
limitation, expensesincurredfor substituteor replacementlawn
careservicesor for rentalexpensesto temporarily replacea
warranted product.
Somestatesdo notallowthe exclusionor limitationof incidentalor
consequentialdamages,or limitationson howlong an impliedwarranty
lasts, sothe aboveexclusionsor limitationsmaynot applyto you.
In no event shallrecoveryof any kindbe greaterthanthe amountof the
purchasepriceof the productsold.Alterationof safety features of
the productshallvoid this warranty. Youassumethe risk and liability
for loss,damage,or injuryto you and yourpropertyand/orto others and
theirpropertyarisingout of the misuseor inabilityto usethe product.
This limitedwarrantyshallnot extendto anyoneotherthan theoriginal
purchaseror to the personfor whomitwas purchasedas a gift.
HOWSTATELAWRELATESTOTHIS WARRANTY: This limited
warrantygivesyou specificlegal rights,and youmay alsohaveother
rightswhich vary from stateto state.
IMPORTANT:OwnermustpresentOriginal Proofof Purchaseto obtain
warrantycoverage.

d. Servicecompletedby someoneotherthanan authorizedservice
dealer.

IViTD LLC, P.O. BOX 361131 CLEVELAND, OHiO 44136-0019;

Phone: 1=800=800-7310, 1-330=220-4683

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MTD 11B 439Q755 User Manual LAWN MOWER Manuals And Guides 1108108L

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