Scag Power Equipment STTII-52V-26CH-EFI User manual

PART NO. 03407
PRINTED 1/2016
PRINTED IN USA
© 2016
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.
Congratulations on owning a Scag mower! This manual contains the operating
instructions and safety information for your Scag mower. Reading this manual
can provide you with assistance in maintenance and adjustment procedures to
keep your mower performing to maximum efciency. The specic models that
this book covers are listed on the inside cover. Before operating your machine,
please read all the information enclosed.
OPERATOR’S
MANUAL
Models: STTII-52V-26CH-EFI
STTII-61V-25KA
STTII-61V-26CH-EFI
STTII-61V-26DFI
STTII-61V-31DFI
STTII-61V-35BV
STTII-72V-26CH-EFI
STTII-72V-26DFI
STTII-72V-31DFI
STTII-72V-35BV

WARNING
FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT IN
SERIOUS INJURY OR DEATH.
• Readthismanualcompletelyaswellasothermanualsthatcamewithyourmower.
• DONOToperateonsteepslopes.Tocheckaslope,attempttobackupit(withthe
cutterdeckdown).Ifthemachinecanbackuptheslopewithoutthewheelsslipping,
reducespeedanduseextremecaution.
• Undernocircumstancesshouldthemachinebeoperatedonslopesgreaterthan15
degrees.ALWAYSFOLLOWOSHAAPPROVEDOPERATION.
• Staytwocutwidthsawayfromslopes,dropoffs,ditchesandretainingwalls.
• DONOTmowonwetgrass.Wetgrassreducestractionandsteeringcontrol.
• Keepallshieldsinplace,especiallythegrassdischargechute.
• Beforeperforminganymaintenanceorservice,stopthemachineandremovethe
sparkplugwireandignitionkey.
• Ifamechanismbecomesclogged,stoptheenginebeforecleaning.
• Keephands,feetandclothingawayfrompower-drivenparts.
• Keepothersoffthemower (only one person at a time)
REMEMBER - YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR!
HAZARD CONTROL AND ACCIDENT PREVENTION ARE DEPENDENT UPON THE AWARENESS,
CONCERN, PRUDENCE, AND PROPER TRAINING OF THE PERSONNEL INVOLVED IN THE
OPERATION, TRANSPORT, MAINTENANCE, AND STORAGE OF THE EQUIPMENT.
This manual covers the operating instructions and illustrated parts list for:
STTII-52V-26CH-EFI with a serial number of L9900001 to L9999999
STTII-61V-25KA with a serial number of M0100001 to M0199999
STTII-61V-26CH-EFI with a serial number of M0300001 to M0399999
STTII-61V-26DFI with a serial number of M0400001 to M0499999
STTII-61V-31DFI with a serial number of M2600001 to M2699999
STTII-61V-35BV with a serial number of M0500001 to M0599999
STTII-72V-26CH-EFI with a serial number of M0700001 to M0799999
STTII-72V-26DFI with a serial number of M0800001 to M0899999
STTII-72V-31DFI with a serial number of M2700001 to M2799999
STTII-72V-35BV with a serial number of M0900001 to M0999999
Always use the entire serial number listed on the serial number tag when referring to this product.

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Table of Contents
Table of Contents
SECTION 1 - GENERAL INFORMATION...................................................................................1
1.1 INTRODUCTION...........................................................................................................................................1
1.2 DIRECTION REFERENCE ...........................................................................................................................1
1.3 SERVICING THE ENGINE AND DRIVE TRAIN COMPONENTS.................................................................1
1.4 SYMBOLS ....................................................................................................................................................2
SECTION 2 - SAFETY INFORMATION ......................................................................................3
2.1 INTRODUCTION...........................................................................................................................................3
2.2 SIGNAL WORDS ..........................................................................................................................................3
2.3 BEFORE OPERATION CONSIDERATIONS................................................................................................3
2.4 OPERATION CONSIDERATIONS................................................................................................................4
2.5 ROLL-OVER PROTECTION SYSTEM.........................................................................................................6
2.6 MAINTENANCE CONSIDERATIONS & STORAGE ....................................................................................8
2.7 USING A SPARK ARRESTOR.....................................................................................................................8
2.8 SPARK IGNITION SYSTEM .........................................................................................................................8
2.9 SAFETY AND INSTRUCTIONAL DECALS.................................................................................................9
SECTION 3 - SPECIFICATIONS ..............................................................................................10
3.1 ENGINE ......................................................................................................................................................10
3.2 ELECTRICAL .............................................................................................................................................10
3.3 POWER HEAD ...........................................................................................................................................11
3.4 CUTTER DECK ..........................................................................................................................................11
3.5 HYDRAULIC SYSTEM ...............................................................................................................................12
3.6 WEIGHTS AND DIMENSIONS ...................................................................................................................12
3.7 PRODUCTIVITY .........................................................................................................................................12
SECTION 4 - OPERATING INSTRUCTIONS ...........................................................................13
4.1 TIGER EYE INSTRUMENT IDENTIFICATION ...........................................................................................13
4.2 CONTROLS IDENTIFICATION ..................................................................................................................15
4.3 SAFETY INTERLOCK SYSTEM ................................................................................................................16
4.4 INITIAL RUN-IN PROCEDURES................................................................................................................16
4.5 STARTING THE ENGINE ...........................................................................................................................16
4.6 GROUND TRAVEL AND STEERING .........................................................................................................17
4.7 ENGAGING THE DECK DRIVE (CUTTER BLADES)................................................................................18
4.8 HILLSIDE OPERATION..............................................................................................................................18
4.9 PARKING THE MOWER.............................................................................................................................18
4.10 AFTER OPERATION ................................................................................................................................19
4.11 REMOVING CLOGGED MATERIAL ........................................................................................................19
4.12 MOVING MOWER WITH ENGINE STOPPED..........................................................................................19
4.13 RECOMMENDATIONS FOR MOWING ....................................................................................................19
4.14 ADJUSTING CUTTING HEIGHT..............................................................................................................20
4.15 ADJUSTING THE STEERING LEVERS...................................................................................................21
4.16 ADJUSTING THE HEIGHT ADJUST PEDAL ..........................................................................................21
4.17 TOWING (OPTIONAL HITCH ACCESSORY)...........................................................................................21

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Table of Contents
SECTION 5 - TROUBLESHOOTING CUTTING CONDITIONS ...............................................22
SECTION 6 - ADJUSTMENTS .................................................................................................25
6.1 TRAVEL ADJUSTMENTS ..........................................................................................................................26
6.2 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ............................................................................27
6.3 BELT ADJUSTMENT .................................................................................................................................27
6.4 BELT ALIGNMENT.....................................................................................................................................28
6.5 CUTTER DECK ADJUSTMENTS ..............................................................................................................28
6.6 CUSTOM-CUT BAFFLE ADJUSTMENT ...................................................................................................30
6.7 ELECTRIC CLUTCH ADJUSTMENT.........................................................................................................31
SECTION 7 - MAINTENANCE..................................................................................................32
7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS ......................................................32
7.2 LUBRICATION............................................................................................................................................33
7.3 HYDRAULIC SYSTEM ...............................................................................................................................35
7.4 ENGINE OIL ...............................................................................................................................................36
7.5 ENGINE FUEL SYSTEM ............................................................................................................................36
7.6 ENGINE AIR CLEANER.............................................................................................................................37
7.7 BATTERY....................................................................................................................................................38
7.8 DRIVE BELTS.............................................................................................................................................39
7.9 CUTTER BLADES......................................................................................................................................39
7.10 TIRES........................................................................................................................................................41
7.11 CUTTER DECK GEARBOX .....................................................................................................................41
7.12 COOLING SYSTEM .................................................................................................................................41
7.13 BODY, DECK, AND UPHOLSTERY .........................................................................................................42
SECTION 8 - ILLUSTRATED PARTS LIST ..............................................................................43
STTII 52V CUTTER DECK ...............................................................................................................................44
STTII 61V & 72V CUTTER DECKS..................................................................................................................46
STTII CUTTER DECK CONTROLS .................................................................................................................48
STTII SHEET METAL COMPONENTS ............................................................................................................50
STTII ROLL-OVER PROTECTION SYSTEM ...................................................................................................52
STTII SUSPENSION SEAT ..............................................................................................................................54
NOTES..............................................................................................................................................................55
STTII DECK DRIVE COMPONENTS ...............................................................................................................56

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Table of Contents
STTII ENGINE AND ATTACHING PARTS - AIR COOLED..............................................................................58
STTII ENGINE & ATTACHING PARTS - LIQUID COOLED.............................................................................60
STTII BRAKE COMPONENTS.........................................................................................................................62
STTII STEERING COMPONENTS ...................................................................................................................64
STTII HYDRAULIC SYSTEM ...........................................................................................................................66
STTII FUEL SYSTEM .......................................................................................................................................68
BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN ................................................................70
STTII ELECTRICAL SYSTEM..........................................................................................................................72
REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................74
ELECTRICAL SCHEMATIC - KAWASAKI 25KA ............................................................................................76
ELECTRICAL SCHEMATIC - KAWASAKI 26DFI............................................................................................77
ELECTRICAL SCHEMATIC - KOHLER 26EFI ................................................................................................78
ELECTRICAL SCHEMATIC - KAWASAKI 31DFI............................................................................................79
ELECTRICAL SCHEMATIC - BRIGGS & STRATTON 35BV ..........................................................................80
NOTES..............................................................................................................................................................81
LIMITED WARRANTY - COMMERCIAL EQUIPMENT................................................... INSIDE BACK COVER

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Table of Contents

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Section 1
1.1 INTRODUCTION
Yourmowerwasbuilttothehigheststandardsinthe
industry.However,theprolongedlifeandmaximum
efficiencyofyourmowerdependsonyoufollowingthe
operating,maintenanceandadjustmentinstructionsin
thismanual.
Ifadditionalinformationorserviceisneeded,contactyour
ScagPowerEquipmentDealer.
Weencourageyoutocontactyourdealerforrepairs.
AllScagdealersareinformedofthelatestmethodsto
servicethisequipmentandprovidepromptandefficient
serviceinthefieldorattheirserviceshop.Theycarrya
fulllineofScagserviceparts.
- IMPORTANT -
The replacement of any part on this product
by other than the manufacturer's authorized
replacement part may adversely affect the
performance, durability or safety of this
product.
Use of other than original Scag replacement
parts will void the warranty.
Whenorderingparts,alwaysgivethemodelandserial
numberofyourmower.Theserialnumberplateislocated
betweentheseatandthecontrolswhereshowninFigure
1-1.
SERIAL NUMBER
LOCATION
Figure 1-1. Mower Serial Number Plate Location
GENERAL INFORMATION
USE ONLY SCAG APPROVED ATTACHMENTS AND
ACCESSORIES.
Attachmentsandaccessoriesmanufacturedbycompanies
otherthanScagPowerEquipmentarenotapprovedfor
useonthismachine.SeeSection8-1.
WARNING
For pictorial clarity, some illustrations and figures
in this manual may show shields, guards or plates
open or removed. Under no circumstances should
your mower be operated without these devices
in place.
Allinformationisbaseduponproductinformationavailable
atthetimeofapprovalforprinting.ScagPowerEquipment
reservestherighttomakechangesatanytimewithout
noticeandwithoutincurringanyobligation.
1.2 DIRECTION REFERENCE
The“Right”and“Left”,“Front”and“Rear”ofthemachine
arereferencedfromtheoperator’srightandleftwhen
seatedinthenormaloperatingpositionandfacingthe
forwardtraveldirection.
1.3 SERVICING THE ENGINE AND DRIVE
TRAIN COMPONENTS
Thedetailservicingandrepairoftheengine,hydraulic
pumpsandgearboxesarenotcoveredinthismanual;
onlyroutinemaintenanceandgeneralserviceinstructions
areprovided.Forserviceofthesecomponentsduringthe
limitedwarrantyperiod,itisimportanttocontactyour
Scagdealerorfindalocalauthorizedservicingagent
ofthecomponentmanufacturer.Anyunauthorizedwork
doneonthesecomponentsduringthewarrantyperiod
mayvoidyourwarranty.

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Section 1
1.4 SYMBOLS
SYMBOL DESCRIPTION SYMBOL DESCRIPTION

Choke

Transmission

ParkingBrake

48071S
SpinningBlade

On/Start

SpringTensiononIdler

Off/Stop

Oil

FallingHazard

ThrownObjectHazard

Fast

Slow

ContinuouslyVariable-Linear

CuttingElement-BasicSymbol

481039S
PinchPoint

CuttingElement-Engage

Hourmeter/ElapsedOperatingHours

CuttingElement-Disengage

KeepBystandersAway

ReadOperator'sManual

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Section 2
2.1 INTRODUCTION
Yourmowerisonlyassafeastheoperator.Carelessness
or operator error may result in serious bodily injury
or death. Hazard control and accident prevention are
dependentupontheawareness,concern,prudence,and
propertrainingofthepersonnelinvolvedintheoperation,
transport,maintenanceandstorageoftheequipment.Make
sure every operator is properly trained and thoroughly
familiar with all of the controls before operating the
mower.Theowner/usercanpreventandisresponsiblefor
accidentsorinjuriesoccurringtothemselves,otherpeople
orproperty.
READ THIS OPERATOR’S MANUAL BEFORE
ATTEMPTING TO START YOUR MOWER.
Areplacementmanualisavailablefromyourauthorized
Scag Service Dealer or by contacting Scag Power
Equipment,ServiceDepartmentatP.O.Box152,Mayville,
WI53050orcontactusviatheInternetatwww.scag.com.
Themanualforthismachinecanbedownloadedbyusing
themodelandserialnumberorusethecontactformto
makeyourrequest.Pleaseindicatethecompletemodel
andserialnumberofyourScagproductwhenrequesting
replacementmanuals.
2.2 SIGNAL WORDS
This symbol means “Attention! Become Alert! Your
Safety is Involved!"Thesymbolisusedwiththefollowing
signalwordstoattractyourattentiontosafetymessages
foundonthedecalsonthemachineandthroughoutthis
manual.The message that follows the symbol contains
important information about safety.To avoid injury and
possibledeath,carefullyreadthemessage!Besuretofully
understandthecausesofpossibleinjuryordeath.
SIGNAL WORD:
Itisadistinctivewordfoundonthesafetydecalsonthe
machineandthroughoutthismanualthatalertstheviewer
totheexistenceandrelativedegreeofthehazard.
DANGER
The signal word“DANGER” denotes that an extremely
hazardous situation exists on or near the machine that
couldresultinhighprobabilityofdeathorirreparableinjury
ifproperprecautionsarenottaken.
WARNING
Thesignalword“WARNING”denotesthatahazardexists
onornearthemachinethatcanresultininjuryordeathif
properprecautionsarenottaken.
CAUTION
Thesignalword“CAUTION”isareminderofsafetypractices
onornearthemachinethatcouldresultinpersonalinjury
ifproperprecautionsarenottaken.
Yoursafetyandthesafetyofothersdependssignificantly
upon your knowledge and understanding of all correct
operatingpracticesandproceduresofthismachine.
2.3 BEFORE OPERATION
CONSIDERATIONS
WARNING
Check all hydraulic connections for tightness.
Inspect all hydraulic hoses and / or lines to insure
they are in good condition before operating.
1. NEVERallowchildrentooperatethisridingmower.
Donotallowadultstooperatethismachinewithout
properinstructions.
2. Donotmowwhenchildrenand/orothersare
present.Keepchildrenoutofthemowingareaand
inthewatchfulcareofaresponsibleadultotherthan
theoperator.Bealertandturnmachineoffifachild
entersthearea.
SAFETY INFORMATION

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Section 2
3. DONOTallowchildrentorideorplayonthe
machine,itisnotatoy.
4. Cleartheareatobemowedofobjectsthatcouldbe
pickedupandthrownbythecutterblades.
5. DONOTcarrypassengers.
6. DONOToperatethemachineundertheinfluenceof
alcoholordrugs.
7. Iftheoperator(s)ormechanic(s)cannotread
English, itistheowner'sresponsibilitytoexplain this
materialtothem.
8. DONOTwearloosefittingclothing.Looseclothing,
jewelryorlonghaircouldgettangledinmoving
parts.Donotoperatethemachinewearingshorts;
alwayswearadequateprotectiveclothingincluding
longpants.Wearingsafetyglasses,safetyshoesand
ahelmetisadvisableandisrequiredbysomelocal
ordinancesandinsuranceregulations.
WARNING
Always wear hearing protection. Operating this
machine over prolonged periods of time can
cause loss of hearing.
9. Keepthemachineandattachmentsingood
operatingcondition.Keepallshieldsandsafety
devicesinplace.Ifashield,safetydeviceordecal
isdefectiveordamaged,repairorreplaceitbefore
operatingthemachine.
WARNING
This machine is equipped with an interlock system
intended to protect the operator and others from
injury. This is accomplished by preventing the
engine from starting unless the deck drive is
disengaged, the parking brake is on, the steering
control levers are in the neutral position and the
operator is in the seat. The system shuts off the
engine if the operator leaves the seat with the deck
drive engaged and/or the steering control levers
are not in the neutral position and the parking
brake is not engaged. Never operate equipment
with the interlock system disconnected or
malfunctioning.
10. Besuretheinterlockswitchesarefunctioning
correctly.
11. Fuelisflammable;handleitwithcare.Fillthefuel
tankoutdoors.Neverfillitindoors.Useafunnelor
spouttopreventspillage.Cleanupanyspillage
beforestartingtheengine.
12. DONOTaddfueltoarunningorhotengine.Allow
theenginetocoolforseveralminutesbeforeadding
fuel.Neverfuelindoorsorinsideenclosedtrailers.
13. Keepflammableobjects(cigarettes,matches,etc.),
openflamesandsparksawayfromthefueltankand
fuelcontainer.Useonlyapprovedcontainers.
14. SeeSection7.5ENGINEFUELSYSTEMforfueling
procedure.
15. Equipmentmustcomplywiththelatestrequirements
perSAEJ137and/orANSI/ASAES279whendriven
onpublicroads.
- NOTE -
If the mower is driven on public roads, it must
comply with state and local ordinances as well as
SAE J137 and/or ANSI / ASAE S279 requirements.
Contact your local authorities for regulations and
equipment requirements.
16. Donotoperatewithoutthesidedischargechute
installedandinthedownpositionorwithanoptional
grasscatcherormulchplatecompletelyinstalled.
17. Checktheblademountingboltsatfrequentintervals
forpropertightness.
18. Makesureallhydraulicfluidconnectionsaretight
andallhydraulichosesandlinesareingood
conditionbeforestartingthemachine.
2.4 OPERATION CONSIDERATIONS
1. Knowthefunctionofallcontrolsandhowtostop
quickly.
WARNING
DO NOT operate on steep slopes.To check a slope,
attempt to back up it (with the cutter deck down).
If the machine can back up the slope without the
wheels slipping, reduce speed and use extreme
caution. Under no circumstances should the
machine be operated on slopes greater than 15
degrees. See Figure 2-4, Page 7 to determine
approximate slope of area to be mowed. ALWAYS
FOLLOW OSHA APPROVED OPERATION.

5
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Section 2
2. Reducespeedandexerciseextremecautionon
slopesandinsharpturnstopreventtippingorloss
ofcontrol.Beespeciallycautiouswhenchanging
directionsonslopes.
3. Staytwocutwidthsawayfromslopes,dropoffs,
ditchesandretainingwalls.
4. Topreventtippingorlossofcontrol,startandstop
smoothly,avoidunnecessaryturnsandtravelat
reducedspeed.
5. Immediatelyapplytheparkingbrakeifyoulose
steeringcontrolwhileoperating.Inspectthemachine
andcorrecttheproblembeforecontinuingtooperate.
6. Whenusinganyattachment,neverdirectthe
dischargeofmaterialtowardbystandersorallow
anyonenearthemachinewhileinoperation.
7. Beforeattemptingtostarttheengine,withthe
operatorintheseat,disengagepowertothecutter
deck,placethesteeringcontrolleversintheneutral
positionandengagetheparkingbrake.
8. Ifthemowerdischargeeverplugs,shutoffthe
engine,removetheignitionkey,andwaitforall
movementtostopbeforeremovingtheobstruction.
WARNING
DO NOT use your hand to dislodge the clogged
discharge chute. Use a stick or other device to
remove clogged material after the engine has
stopped running and the blades have stopped
turning.
9. Bealertforholes,rocks,rootsandotherhidden
hazardsintheterrain.Keepawayfromanydrop-
offs.Bewareofoverheadobstructions(lowlimbs,
etc.),undergroundobstacles(sprinklers,pipes,tree
roots,etc.).Cautiouslyenteranewarea.Bealertfor
hiddenhazards.
10. Disengagepowertocutterdeckbeforebackingup.
Donotmowinreverseunlessabsolutelynecessary
andthenonlyafterobservationoftheentirearea
behindthemower.Ifyoumustmowinreverse,
maintainaconstantlookouttotherearofthe
machineandmowslowly.
11. DONOTturnsharply.Usecarewhenbackingup.
12. Disengagepowertocutterdeckbeforecrossing
roads,walksorgraveldrives.
13. Mowonlyindaylightorgoodartificiallight.
14. NEVERraisethedeckwiththebladesengaged.
15. Takeallpossibleprecautionswhenleavingthe
machineunattended,suchasdisengagingthe
mower,loweringtheattachments,settingtheparking
brake,stoppingtheengine,andremovingthekey.
16. Disengagepowertotheattachmentswhen
transportingorwhennotinuse.
17. Themachineandattachmentsshouldbestopped
andinspectedfordamageafterstrikingaforeign
object,anddamageshouldberepairedbefore
restartingandoperatingthemachine.
CAUTION
Do not touch the engine or the muffler while the
engine is running or immediately after stopping.
These areas may be hot enough to cause a
burn.
DANGER
DO NOT run the engine inside a building or
a confined area without proper ventilation.
Exhaust fumes are hazardous and contain
carbon monoxide which can cause brain injury
and death.
18. Keephandsandfeetawayfromcutterbladesand
movingparts.Contactcaninjure.
19. Transportthemowerusingaheavydutytrailer
ortruck.Insurethetrailerortruckhasallofthe
necessarylightingandmarkingsasrequiredby
laws,codes,andordinances.Secureatrailerwitha
safetychain.
20. Becautiouswhenloadingandunloadingontotrailers
ortrucks.Useonlyafullwidthramp.Rampangle
shouldbenomorethan15degrees.SeeFigure2-4,
Page7todetermineapproximateslopeoftheramp.
Backuptherampanddrivedownforward.
21. Whentransportingthemower,makesurethepark
brakeisengaged,thesteeringcontrolleversarein
theneutralposition,theengineisoffwiththekey
removed,andthewheelshavebeenblocked.
22. Tiethemowerdownsecurelyusingstraps,chains,
cable,orropes.Bothfrontandrearstrapsmustbe
directeddownandoutwardfrommachine.

6
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Section 2
Lowertherollbaronlywhenabsolutelynecessary.
1. Tolowertherollbar,removethehairpincotterpins
andremovethetwo(2)lockpins.SeeFigure2-2.
2. Lowertherollbartothedownposition.
3. Toraisetherollbar,liftthebartotheupright
position.
4. Installthetwo(2)lockpinsthroughthehole,secure
withthetwo(2)hairpincotterpins.SeeFigure2-2.
UPRIGHT AND
LOCKED POSITION
Figure 2-1. Foldable Roll-Over Protection System
HAIR PIN
LOCK PIN
Figure 2-2. ROPS Hinge
The potential exposure of the seat belt to severe
environmentalconditionsmakeitcrucialtoinspecttheseat
beltsystemregularly.
Itis recommendedthat theseat beltbe inspected ona
dailybasisforsignsofdamage.Anyseatbeltsystemthat
showscuts,fraying,extremeorunusualwear,significant
discolorationduetoUVexposure,dirtorstiffness,abrasion
totheseatbeltwebbing,ordamagetothebuckle,latch
plate,hardwareoranyotherobviousproblemshouldbe
replacedimmediately.
23. Usecarewhenapproachingblindcorners,shrubs,
trees,orotherobjectsthatmayobscurevision.
24. NEVERleavethemachinerunningunattended.
2.5 ROLL-OVER PROTECTION SYSTEM
WARNING
Keep the roll bar in the raised and locked position
and the seat belt securely fastened during
operation. Failure to do so could cause serious
injury or loss of life.
This mower has been designed for good traction and
stabilityundernormalmowingconditions.However,caution
mustbeusedwhentravelingonslopes,especiallywhenthe
grassiswet.Donotmowonwetgrass.Wetgrassreduces
tractionandsteeringcontrol.
AnyorallpartsoftheRoll-OverProtectionSystemMUST
NOTberemoved.Failuretoadheretothisguidelinecould
resultininjuryordeath.
WARNING
There is no roll-over protection when the roll bar
is in the down position.
Lower the roll bar only when absolutely
necessary.
Raise the roll bar as soon as clearance permits.
DO NOT wear the seat belt when the roll bar is in
the down position.
ALWAYS wear seat belt when roll bar is in the up
position.
Operate the machine smoothly, no sudden turns,
starts or stops.
Check the area carefully before mowing for proper
overhead clearance (i.e. branches, doorways,
etc.).
DO NOT contact any overhead object with the
roll bar.

7
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Section 2
WARNING
Failure to properly inspect and maintain the seat
belt can cause serious injury or loss of life.
1. Checkthefulllengthoftheseatbeltwebbingfor
cuts,wear,fraying,dirtandstiffness.SeeFigure2-3.
2. Checktheseatbeltwebbinginareasexposedto
ultravioletraysfromthesunorextremedustor
dirt.Iftheoriginalcolorofthewebbinginthese
areasisextremelyfadedand/orispackedwithdirt,
thephysicalstrengthofthiswebbingmayhave
deteriorated.Ifthisconditionexists,replacetheseat
beltsystem.
3. Checkthebuckleandlatchforproperoperation
anddetermineifthelatchplateisexcessivelyworn,
deformed,orifthebuckleisdamagedorcracked.
SeeFigure2-3.
INSPECT WEBBING
INSPECT BUCKLE
& LATCH
Figure 2-3. Seat Belt Inspection
5o
10o
15o
20o
Figure 2-4. Slope Angle Graph
WARNING
Reduce speed when turning, operating on slopes,
slick or wet surfaces. Allow extra distance to
stop.
Stay off of slopes too steep for safe operation.
To check a slope, attempt to back up it (with the
cutter deck down). If the machine can not back
up the slope without the wheels slipping, do not
operate the machine on this slope. Under no
circumstances should the machine be operated
on slopes greater than 15 degrees. See Figure 2-4
to determine approximate slope.
DO NOT mow near drop-offs, ditches or
embankments. The machine could suddenly roll
over if a wheel goes over the edge or if the edge
caves in.
Operate the machine smoothly, no sudden turns,
starts or stops on a slope.
NEVER tow on slopes. The weight of the towed
equipment may cause loss of traction and loss
of control.
DO NOT permit untrained personnel to operate
the machine.
Be cautious when loading and unloading onto
trailers or trucks.
Use only a full width ramp.
Ramp angle should be no more than 15 Degrees.
See Figure 2-4 to help determine approximate
slope.
Back up the ramp and drive down forward.

8
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Section 2
2.6 MAINTENANCE CONSIDERATIONS &
STORAGE
1. Nevermakeadjustmentstothemachinewiththe
enginerunningunlessspecificallyinstructedtodo
so.Iftheengineisrunning,keephands,feet,and
clothingawayfrommovingparts.
2. Disengagedrives,lowerimplement,setparking
brake,stopengineandremovekeyordisconnect
sparkplugwiretopreventaccidentalstartingofthe
enginewhenservicingoradjustingthemachine.
Waitforallmovementtostopbeforeadjusting,
cleaningorrepairing.
3. Disconnectbatteryorremovesparkplugwirebefore
makinganyrepairs.Disconnectthenegativeterminal
firstandthepositivelast.Reconnectthepositivefirst
andthenegativelast.
4. Keepallnuts,boltsandscrewstight,toensurethe
machineisinsafeworkingcondition.Checkblade
mountingboltsfrequentlytobesuretheyaretight.
5. Donotchangetheenginegovernorsettingsor
overspeedtheengine.Seetheengineoperator's
manualforinformationonenginesettings.
6. Toreducefirehazard,keepthecuttingunits,drives,
mufflerandenginefreeofgrass,leaves,excessive
grease,oilanddirt.
7. Parkthemachineonlevelgroundandengagethe
parkingbrake.
8. NEVERallowuntrainedpersonneltoservicethe
machine.
9. Usecarewhencheckingblades.UseaBladeBuddy,
wraptheblade(s)orwearglovesandUSECAUTION
whenservicingblades.Onlyreplaceblades.NEVER
straightenorweldblades.
10. Keepallpartsingoodworkingcondition.Replaceall
wornordamageddecals.
11. Usejackstandstosupportcomponentswhen
required.
12. Carefullyreleasepressurefromcomponentswith
storedenergy.
WARNING
Hydraulic fluid is under high pressure and can
penetrate skin causing injury. If hydraulic fluid
is injected into the skin, it must be surgically
removed within a few hours by a doctor or
gangrene may result.
Keep body and hands away from pinholes or
nozzles that eject hydraulic fluid under high
pressure.Use paper or cardboard and not hands
to search for leaks.
Safely relieve all pressure from the hydraulic
system by placing the control levers in the neutral
lock position and shutting off the engine before
performing any work on the hydraulic system.
If you need service on your hydraulic system,
please see your authorized Scag dealer.
13. Lettheenginecoolbeforestoring.
14. DONOTstorethemachinenearanopenflame.
15. Shutofffuelwhilestoringortransporting.
16. DONOTstorefuelnearflamesordrainindoors.
17. Chargebatteriesinanopen,wellventilatedarea,
awayfromsparkandflames.Unplugchargerbefore
connectingordisconnectingfrombattery.Wear
protectiveclothinganduseinsulatedtools.
2.7 USING A SPARK ARRESTOR
Theengineinthismachine(excludingthe35BVAC)isnot
equippedwithasparkarrestormuffler.Itisinviolationof
CaliforniaPublicResourceCodeSection4442touseor
operatethisengineonornearanyforestcovered,brush
coveredorgrasscoveredlandunlesstheexhaustsystem
isequippedwithasparkarrestormeetinganyapplicable
localorstatelaws.Otherstatesorfederalareasmayhave
similarlaws.Checkwithyourstateorlocalauthoritiesfor
regulationspertainingtotheserequirements.
2.8 SPARK IGNITION SYSTEM
This spark ignition system complies with Canadian
ICES-002.

9
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Section 2
2.9 SAFETY AND INSTRUCTIONAL DECALS
WARNING
INSTALL BELT COVER BEFORE
OPERATING MACHINE
READ OPERATOR'S MANUAL 483402
390S0150J
481568
FORWARD
REVERSE
FR
484281
483406
483407 483402
484320
483407
483633
483425
483300
WARNING
Operation of this equipment
may create sparks that can
start res around dry
vegetation. A spark
arrestor may be required.
The operator should contact
local re agencies for laws
or regulations relating to
re prevention requirements.
483900
483900
(suppliedwithCalifornia
modelsonly)
484293
485664/485964

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Section 3
SPECIFICATIONS
3.1 ENGINE
GeneralType................................................................................................HeavyDutyIndustrial/CommercialGasoline
Model:
ScagModelSTTII-61V-25KA......................................................................................................... KawasakiFD750D
ScagModelSTTII-52V-26CH-EFI,STTII-61V-26CH-EFI,STTII-72V-26CH-EFI..............KohlerCommandECH749
ScagModelSTTII-61V-26DFI,STTII-72V-26DFI........................................................................... KawasakiFD791D
ScagModelSTTII-61V-31DFI,STTII-72V-31DFI........................................................................... KawasakiFD851D
ScagModelSTTII-61V-35BV,STTII-72V-35BV.................................................................Briggs&StrattonVanguard
Displacement:
Kohler26CH-EFI(ECH749)............................................................................................................................... 747cc
Kawasaki25KA(FD750D)and26DFI(FD791D)............................................................................................... 745cc
Kawasaki31DFI(FD851D)................................................................................................................................. 824cc
Briggs&Stratton35BV...................................................................................................................................... 993cc
Type:
Kawasaki(FD750D).............................................................4-Cycle,Air-Cooled,NaturallyAspiratedGasoline,OHV
Kohler(ECH749).......................................................... 4-Cycle,AirCooled,ElectronicFuelInjectionGasoline,OHV
Kawasaki(FD791D,FD851D)...................................... 4-Cycle,Liquid-Cooled,DigitalFuelInjectionGasoline,OHV
Briggs&Stratton.................................................................................4-Cycle,Air-Cooled,NaturallyAspirated,OHV
Cylinders..................................................................................................................................... 2withCastIronSleeves
Governor........................................................................MechanicalTypewithVariableSpeedControlSetAt3800RPM
IdleSpeed:
Kohler.......................................................................................................................................................... 1400RPM
Kawasaki..................................................................................................................................................... 1400RPM
Briggs&Stratton......................................................................................................................................... 1750RPM
Carburation:
Kawasaki(FD750D)................................................................................................... FixedJetDowndraftCarburetor
Kohler(ECH749)....................................................................................................................ElectronicFuelInjection
Kawasaki(FD791D).....................................................................................................................DigitalFuelInjection
Kawasaki(FD851D).....................................................................................................................DigitalFuelInjection
Briggs&Stratton.......................................................................................................... FixedJetSidedraftCarburetor
FuelPump:
Kohler.................................................................................................................... MechanicalwithIn-LineFuelFilter
Kawasaki.............................................................................................. HighPressureElectricwithIn-LineFuelFilter
Briggs&Stratton................................................................................................... MechanicalwithIn-LineFuelFilter
Fuel...................................................................................... Non-LeadedGasolinewithaMinimumOctaneRatingof87
OilPump...........................................................................................................................FullPressurew/Full-FlowFilter
Starter........................................................................................................................ ElectricStartingwithSolenoidShift
Belts................................................................................................................ Kevlarcord,Self-adjusting,Self-tightening
3.2 ELECTRICAL
Battery.................................................................................................................................................................... 12Volt
ChargingSystem............................................................................................................................................... Alternator
ChargingOutput:
Kohler(ECH749)................................................................................................................................. 12Volt,20Amp
Kawasaki(FD750D,FD791D).............................................................................................................12Volt,20Amp
Kawasaki(FD851D)............................................................................................................................12Volt,30Amp
Briggs&Stratton.................................................................................................................................12Volt,20Amp
SystemPolarity.......................................................................................................................................NegativeGround
InterlockSwitches....................................................... Seat,NeutralControl,MowerEngagement(BBC),ParkingBrake
InstrumentPanel....................................................TigerEyeAdvancedMonitoringSystem,KeySwitch,ThrottleLever,
......................ManualChoke(Non-EFI),PTOSwitch,FusesandCheckEngineIndicator(ECH749,FD791D,FD851D)
Fuses........................................................................ One(1)20Amp(26EFI)orTwo(2)20Amp(FD750D,FD851D)or
.............................................................................................................. Three(3)20Amp(FD791D)andOne(1)5Amp

11
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Section 3
3.3 POWER HEAD
DriveSystem............... HydraulicDrivewithTwoVariableDisplacementPumpsandTwoCast-IronHighTorqueMotors
HydrostaticPumps.....................................................................TwoHydro-Gear™16cc/rev.PumpswithDumpValves
DriveWheelMotors:......................................................TwoParkerModelTG15cu.inchCast-IronHighTorqueMotors
Steering/TravelControl...........................................................................................TwinLeverFingertipSteeringControl
 withIndividualControltoEachWheelwithGasSpringDampers
ParkingBrake...................................................................LeverActuatedLinkagetoBrakesonBothDriveWheelAxles
Wheels:
(2)FrontCaster-(52"Deck).......................................................................................... 13X5.00Four-Ply,FlatFree
(2)FrontCaster-(61"&72"Deck)................................................................................ 13X6.50FourPly,FlatFree
(2)Drive-(52"Deck)...................................................... 26X9.50X12Four-PlyPneumaticTubeless,RadiusEdge
(2)Drive-(61"&72"Deck)................................................ 26x12x12Four-PlyPneumaticTubeless,RadiusEdge
TirePressure:
FrontCaster....................................................................................................................................................FlatFree
Drive.................................................................................................................................................................. 12PSI
FuelTank....................................12-GallonSeamlessPolyethyleneTankwithLargeOpening,FuelGaugeandFillCap
Seat...........................................................................................................................................PaddedSuspensionSeat
TravelSpeed........................................................................................................... 750KA/26CH-EFI........ 791DFI/35BV
Forward..................................................................................................................................................... 0upto12MPH
Reverse...................................................................................................................................................... 0upto6MPH
-NOTE-Themachinewilltravelupto12mphfortransportpurposes.Forbestcuttingperformancetheforwardtravel
speedshouldbeadjusteddependinguponthecuttingconditions.
3.4 CUTTER DECK
Type......................... Floating,Adjustable,Anti-Scalping,HybridDesignCombinesOut-FrontandBelly-MountDesigns
Construction............................................................................................................................Tri-Platedeckconstruction
 Topofdeckconsistsofthreesteelplatestotalingnearly1/2"ofsteel.,7-gauge(3/16")deckskirt.
TrueCuttingWidth:
52V........................................................................................................................................................52"(132.0cm)
61V........................................................................................................................................................61"(155.0cm)
72V.....................................................................................................................................................71.5"(181.6cm)
CuttingHeightAdjustment...........Foot-OperatedLeverAdjustmentfromOperator'sSeat,1.0"to6.0"in1/4"increments
CutterBlades.........................................................................197or.250Thick,MilledEdge,WearResistantMarbain™
52V.............................................................................................................................................. Three(3)18"blades
61V.............................................................................................................................................. Three(3)21"blades
72V........................................................................................................................................... Three(3)24.5"blades
BladeEngagement............................................................ElectricBladeEngagementClutchwithControlPanelSwitch
 ConnectedtotheCutterDeckGearboxthroughaDriveShaft.
DischargeOpening....................Extra-WideDischargeOpeningwithSpring-LoadedDischargeChuteandTurboBafe
DischargeChute...................................................................................................Black,Polypropylene(Plastic),Flexible
Spindles......................................Heavy-Duty1-1/8"TopDimensionSpindleShaft,CastHousing,TaperRollerBearing,
 LowMaintenancewithTopAccessGreaseFittingandGreaseOverllReliefPoppet
SpindlePulleys............................................................................................ SplitSteelwithEasilyRemovedTaperHubs
CutterDeckBelts..................................................................B-SectionwithKevlarCord,Self-Adjusting,Self-Tightening
ElectricClutchType................................................................................................OguraHeavyDutyPTOClutchBrake
DriveShaft............................................................................................ClampYokeShaftWithTwoHigh-SpeedU-Joints

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Section 3
3.5 HYDRAULIC SYSTEM
HydraulicOilFilter........................................................................................................ 10MicronSpin-onElementType
HydraulicReservoir.....................................................................................................................Nylon;3QuartCapacity
3.6 WEIGHTS AND DIMENSIONS 52V 61V 72V
Length......................................................................................... 83"...............................87.5"...................................90"
TrackingWidth............................................................................ 51"................................ 56"....................................56"
OverallWidthw/chutedown...................................................... 64.5"..............................73.5"...................................83"
OverallWidthw/chuteup............................................................ 53"................................ 62"....................................73"
OverallHeightw/ROPSup........................................................ 67.5"..............................67.5"................................67.5"
OverallHeightw/ROPSdown.................................................... 56.5"..............................56.5"................................56.5"
OperatingWeightw/ROPS(approx.)........................................ 1420#............................ 1520#............................. 1575#
OperatingWeightw/ROPSand35BVEngine.............................NA.............................. 1445#............................. 1495#
3.7 PRODUCTIVITY 52V 61V 72V
CuttingWidth.............................................................................. 52"................................ 61"....................................72"
AcresPerDay.............................................................................20.2.............................. 23.7..................................... 28
TheprecedingchartwillaidyouindetermininghowmanyacresyourScagmowerwillcutperday.Thechartisan
estimatebasedon8hoursperdaycuttingtimeat6MPHwitha20%allowanceforoverlapandturns.

13
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Section 4
CAUTION
Do not attempt to operate this mower unless you
have read this manual. Learn the location and
purpose of all controls and instruments before
you operate this mower.
Beforeoperatingthemower,familiarizeyourselfwithall
mowerandenginecontrols.Knowingthelocation,function
andoperationofthesecontrolsisimportantforsafeand
efficientoperationofthemower.
ThismachineisequippedwiththeTigerEyeAdvanced
MonitoringSystem.Withthekeyintheonposition,before
startingtheengine,thelightsfortheSeatIndicator,PTO
Indicator,NeutralIndicatorandParkBrakeIndicator
shouldbeilluminated.Thisindicatesthereisanoperator
intheseat,thePTOisoff,steeringleversareinneutral,
andtheparkingbrakeisapplied.Whenallthelightsare
illuminated,thekeycanbeturnedtothestartposition
andthemowercanbestarted.SeeSection4.3Safety
InterlockSystem.Ifanyoftheseindicatorlightsarenot
illuminated,theenginewillbepreventedfromstarting.If
additionalinformationorserviceisneeded,contactyour
ScagPowerEquipmentDealer.
4.1 TIGER EYE INSTRUMENT
IDENTIFICATION
1. Service Air Filter Indicator (Figure 4-1). Optional
Accessory.Indicatestheconditionoftheengineair
filter.Iconwilldisplaywhenitistimetochangethe
airfilter.
2. Glow Plug Indicator (Figure 4-1). Used on Diesel
Powered Units Only. Indicatorturnsonwhenthe
keyswitchisturnedtothePREHEATposition.Glow
plugsmustbepreheatedfor5to10secondsbefore
startingtheengine.
3. Oil Pressure Indicator (Figure 4-1). Indicates
engineoilpressure.Referencetheengineoperator's
manualforfurtherinformation.
OPERATING INSTRUCTIONS
4. Service Engine Indicator (Figure 4-1).Indicates
themaintenancereminderfortheengineoilchange.
Haspresetmaintenancereminderandwillstart
flashingscheduledmaintenance2hoursbefore
presettimeandcontinueflashinguntil2hoursafter.
Automaticallyresets.
5. Voltmeter Indicator (Figure 4-1).Indicatesthe
conditionofthechargingsystem.Whentheengine
isrunning,innormaloperatingconditions,thebar
graphshouldbeinthe12to14voltrange.
6. Seat Indicator (Figure 4-1). Lightwillilluminate
whentheoperatorisintheseatengagingtheseat
switch.
7. PTO Indicator (Figure 4-1). Lightwillilluminate
whenthePTO(mowerdeck)switchisintheOFF
position.
8. Hourmeter Indicator (Figure 4-1).Indicatesthe
numberofhourstheenginehasbeenoperated.
Itonlyoperateswhentheengineisrunning.Will
startflashingwiththeServiceEngineIndicator
atscheduledmaintenance2hoursbeforepreset
timeandcontinueflashinguntil2hoursafter.
Automaticallyresets.
9. Neutral Indicator (Figure 4-1). Lightwillilluminate
whenthesteeringcontrolleversareintheneutral
lockposition.
10. Park Brake Indicator (Figure 4-1). Lightwill
illuminatewhentheparkbrakeisintheengaged
(ON)position.
11. Water Temperature Indicator (Figure 4-1). Used
on Liquid Cooled Models Only. Indicatesthe
operatingtemperatureoftheengine.Iftheengine
temperatureexceedsthemaximumpresetvalue,the
indicatorwillflashandtheParkBrake,PTO,Seat
andNeutralindicatorlightswillflashinanalternating
pattern.
12. Fuse Holders (Figure 4-2). Two20-ampfuses
protectthemower’selectricalsystem.Toreplace
fuses,pullfuseoutofthesocketandinstallanew
fuse.

14
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Section 4
PARKING BRAKE
INDICATOR
NEUTRAL
INDICATOR
SEAT
INDICATOR
PTO
INDICATO
R
WATER TEMPERATURE
INDICATOR
VOLTMETER
INDICATOR
SERVICE ENGINE
INDICATOR
OIL PRESSURE
INDICATOR
GLOW PLUG
INDICATOR
SERVICE AIR
FILTER INDICATOR
HOUR METER
INDICATOR
Figure 4-1. Tiger Eye Advanced Monitoring System
DECK LIFT
SUSPENSION SEAT
CONTROL KNOB
LEFT STEERING
CONTROL
BRAKE
PEDAL
PARKING BRAKE
LOCK LATCH
FUEL
GAUGE
SEAT HOLD DOWN
RELEASE LATCH
CUTTING HEIGHT
ADJUSTMENT
CUTTER DECK
RELEASE LEVER
RIGHT STEERING
CONTROL
DFI / EFI ONLY
CHECK
ENGINE
LIGHT
IGNITION
SWITCH
MOWER DECK
SWITCH
ENGINE THROTTLE
CONTROL
ENGINE CHOKE
CONTROL
TIGER EYE
12 VOLT POWER
SUPPLY
SEAT BELT
DUMP VALV E
CONTROL DUMP VALVE
CONTROL
FUEL SHUTOFF
VALV E
Figure 4-2. Controls and Instruments