Scag Power Equipment STCII-61V-36BV User manual

PART NO. 03549
PRINTED 9/2023
PRINTED IN USA
© 2023
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: STCII-48V-22FX
STCII-48V-23CV
STCII-52V-23FX
STCII-52V-24FT
STCII-52V-25CV-EFI
STCII-52V-26FT-EFI
STCII-52V-28BV-EFI
STCII-61V-26CV-EFI
STCII-61V-26FT-EFI
STCII-61V-27FX
STCII-61V-36BV

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 o󰀨s, ditches, water,retaining walls,
avoid any slope exceeding 15 degrees, and do not mow under trees on slopes with
the roll bar down.
• 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 o󰀨 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:
STCII-48V-22FX with a serial number of X4300001 to X4399999
STCII-48V-23CV with a serial number of X4400001 to X4499999
STCII-52V-23FX with a serial number of X4500001 to X4599999
STCII-52V-24FT with a serial number of X4600001 to X4699999
STCII-52V-25CV-EFI with a serial number of X4700001 to X4799999
STCII-52V-26FT-EFI with a serial number of X4800001 to X4899999
STCII-52V-28BV-EFI with a serial number of X4900001 to X4999999
STCII-61V-26CV-EFI with a serial number of X5000001 to X5099999
STCII-61V-26FT-EFI with a serial number of X5100001 to X5199999
STCII-61V-27FX with a serial number of X5200001 to X5299999
STCII-61V-36BV with a serial number of X5300001 to X5399999
Always use the entire serial number listed on the serial number tag when referring to this product.

I
R
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............................................................................................4
2.4 TESTING THE SAFETY INTERLOCK SYSTEM .....................................................................................5
2.5 OPERATION CONSIDERATIONS............................................................................................................. 5
2.6 ROLL-OVER PROTECTION STRUCTURE..............................................................................................7
2.7 MAINTENANCE CONSIDERATIONS AND STORAGE ..........................................................................9
2.8 USING A SPARK ARRESTOR...................................................................................................................9
2.9 SPARK IGNITION SYSTEM.......................................................................................................................9
2.10 SAFETY AND INSTRUCTIONAL DECALS..........................................................................................10
SECTION 3 - SPECIFICATIONS ..............................................................................................12
3.1 ENGINE .....................................................................................................................................................12
3.2 ELECTRICAL ............................................................................................................................................12
3.3 MOWER .....................................................................................................................................................13
3.4 CUTTER DECK .........................................................................................................................................13
3.5 HYDRAULIC SYSTEM .............................................................................................................................13
3.6 WEIGHTS AND DIMENSIONS ................................................................................................................14
3.7 PRODUCTIVITY........................................................................................................................................14
SECTION 4 - OPERATING INSTRUCTIONS ...........................................................................16
4.1 TIGER EYE INSTRUMENT IDENTIFICATION.......................................................................................16
4.2 CONTROLS IDENTIFICATION................................................................................................................19
4.3 SAFETY INTERLOCK SYSTEM .............................................................................................................20
4.4 TESTING THE SAFETY INTERLOCK SYSTEM ...................................................................................20
4.5 INITIAL RUN-IN PROCEDURES.............................................................................................................21
4.6 STARTING THE ENGINE.........................................................................................................................21
4.7 GROUND TRAVEL AND STEERING ......................................................................................................21
4.8 ENGAGING THE DECK DRIVE (CUTTER BLADES) ...........................................................................22
4.9 HILLSIDE OPERATION ...........................................................................................................................23
4.10 PARKING THE MOWER ........................................................................................................................23
4.11 AFTER OPERATION ..............................................................................................................................23
4.12 REMOVING CLOGGED MATERIAL .....................................................................................................24
4.13 MOVING MOWER WITH ENGINE STOPPED......................................................................................24

II
R
Table of Contents
4.14 RECOMMENDATIONS FOR MOWING ................................................................................................24
4.15 ADJUSTING CUTTING HEIGHT...........................................................................................................25
4.16 TOWING ..................................................................................................................................................25
4.17 ADJUSTING THE HEIGHT ADJUST PEDAL.......................................................................................26
SECTION 5 - TROUBLESHOOTING CUTTING CONDITIONS ...............................................27
SECTION 6 - ADJUSTMENTS .................................................................................................30
6.1 PARKING BRAKE ADJUSTMENT..........................................................................................................30
6.2 TRAVEL ADJUSTMENTS ........................................................................................................................30
6.3 THROTTLE CONTROL AND CHOKE ADJUSTMENTS .......................................................................32
6.4 BELT ADJUSTMENT................................................................................................................................32
6.5 BELT ALIGNMENT ...................................................................................................................................32
6.6 CUTTER DECK ADJUSTMENTS............................................................................................................33
6.7 CUSTOM-CUT BAFFLE ADJUSTMENT ................................................................................................35
6.8 ADJUSTING THE STEERING DAMPNERS...........................................................................................36
6.9 ELECTRIC CLUTCH ADJUSTMENT......................................................................................................36
SECTION 7 - MAINTENANCE..................................................................................................38
7.10 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS ..............................................38
7.11 LUBRICATION ........................................................................................................................................40
7.12 HYDRAULIC SYSTEM ...........................................................................................................................42
7.13 ENGINE OIL ............................................................................................................................................43
7.14 ENGINE FUEL SYSTEM ........................................................................................................................43
7.15 ENGINE AIR CLEANER.........................................................................................................................44
7.16 BATTERY.................................................................................................................................................45
7.17 DRIVE BELTS .........................................................................................................................................45
7.18 CUTTER BLADES ..................................................................................................................................46
7.19 TIRES.......................................................................................................................................................47
7.20 BODY, DECK, AND UPHOLSTERY ......................................................................................................48
SECTION 8 - ILLUSTRATED PARTS LIST..............................................................................49
SCAG APPROVED ATTACHMENTS AND ACCESSORIES. .....................................................................49
48V & 52V CUTTER DECKS..........................................................................................................................50
61V CUTTER DECK .......................................................................................................................................52
CUTTER DECK CONTROLS.........................................................................................................................54
SHEET METAL COMPONENTS....................................................................................................................56
STCII FOLDABLE ROLL-OVER PROTECTION SYSTEM.........................................................................58
STCII SUSPENSION SEAT............................................................................................................................60
DRIVE SYSTEM COMPONENTS..................................................................................................................62
ENGINE & ATTACHING PARTS....................................................................................................................64
STEERING COMPONENTS...........................................................................................................................66
BRAKE COMPONENTS.................................................................................................................................68
HYDRAULIC SYSTEM ...................................................................................................................................70
STCII FUEL SYSTEM.....................................................................................................................................72

III
R
Table of Contents
ELECTRICAL SYSTEM..................................................................................................................................74
ELECTRICAL SYSTEM - KAWASAKI 26FT-EFI .........................................................................................76
ELECTRICAL SYSTEM - KOHLER EFI .......................................................................................................78
STCII HYDRAULIC PUMP ASSEMBLY........................................................................................................80
REPLACEMENT DECALS AND INFORMATION PLATES ........................................................................82
STCII - KAWASAKI FX / FT / KOHLER CV..................................................................................................84
STCII - KAWASAKI FX & FT ENGINE ADAPTER ELECTRICAL SCHEMATIC.......................................85
STCII - KOHLER CV ADAPTER ELECTRICAL SCHEMATIC ...................................................................85
STCII - KAWASAKI 26FT EFI ELECTRICAL SCHEMATIC........................................................................86
STCII - KOHLER 25CV-EFI / 26CV-EFI ELECTRICAL SCHEMATIC ........................................................87
STCII - BRIGGS & STRATTON 28BV-EFI / 36BV ELECTRICAL SCHEMATIC .......................................87
STCII BRIGGS & STRATTON 28BV-EFI ENGINE ADAPTER ELECTRICAL SCHEMATIC ...................88
STCII BRIGGS & STRATTON 36BV ENGINE ADAPTER ELECTRICAL SCHEMATIC ..........................88
LIMITED WARRANTY .............................................................................INSIDE BACK COVER

IV
R
Table of Contents
NOTES

1
R
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
Authorized 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
where shown in Figure 1-1.
Model
Serial
SCAG
STC 2001 SPL-1
SERIAL NUMBER
PLATE LOCATION
Power Equipment
Lorem ipsum
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. Be
aware that using attachments with the mower may affect
stability. Be sure to follow the directions found in the
operator's manual.
WARNING
For pictorial clarity, some illustrations and gures
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 details of 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 Authorized Scag Power Equipment 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.

2
R
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

3
R
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.
This product is capable of amputating hands and feet and
throwing objects. Always follow all safety instructions on this
product and in the manual to avoid personal injury or death.
READ THIS OPERATOR’S MANUAL AND USE THE
QR CODE BELOW TO WATCH THE SAFETY VIDEO
BEFORE ATTEMPTING TO START YOUR MOWER.
MAKE SURE THAT EVERYONE KNOWS WHERE THE
MANUAL IS LOCATED AND KEEP A RECORD OF
EACH EMPLOYEE THAT HAS READ THE MANUAL.
Figure 2-1. SAFETY VIDEO QR CODE
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.
SAFETY INFORMATION

4
R
Section 2
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.
3. DO NOT allow children to ride or play on the
machine, it is not a toy.
4. Keep keys stored in a safe location when the mower
is not in use; i.e. where they are inaccessible to
children.
5. Clear the area to be mowed of objects that could be
picked up and thrown by the cutter blades.
6. DO NOT carry passengers.
7. DO NOT operate the machine under the influence of
alcohol or drugs.
8. If the operator(s) or mechanic(s) cannot read
English, it is the owner's responsibility to explain this
material to them. A Spanish decal kit is available for
this model. See your local Scag Dealer.
9. 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.
10. 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.
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 start the engine until any spilled fuel has
been cleaned up or has evaporated.
13. 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.
14. Keep flammable objects (cigarettes, matches, etc.),
open flames and sparks away from the fuel tank and
fuel container. Use only approved containers.
15. See Section 7.5 ENGINE FUEL SYSTEM for fueling
procedure.
16. 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.
17. 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.
18. Check the blade mounting bolts at frequent intervals
for proper tightness.
19. Make sure all hydraulic fluid connections are tight
and all hydraulic hoses and lines are in good
condition before starting the machine.