SCAG SFC-21-4GX Honda Engine 21 Inch Commercial Walk Behind Mower Instruction Manual

SFC-21-4GX Honda Engine 21 Inch Commercial Walk Behind Mower

OPERATOR’S  MANUAL

Models:  SFC-21-4GX
SFC-21-5CV
SFC-21-7CV

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 efficiency. The specific models that this book covers are listed on the inside cover. Before operating your machine,  please read all the information enclosed.

© 2023
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.

PART NO. 03539
PRINTED 01/23
PRINTED IN USA

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.
• ALWAYS follow all safety instructions on this product and in the manual to avoid  personal injury or death.
• ALWAYS FOLLOW OSHA APPROVED OPERATION.
• This product is capable of amputating hands and feet and throwing objects.
• Keep hands, feet and clothing away from power-driven parts.
• DO NOT operate on steep slopes.
• Always travel across slopes.
• 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.
• If a mechanism becomes clogged, stop the engine before cleaning.
• 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:

SFC-21-4GX| with a serial number of|

W5000001 to W5099999

SFC-21-5CV| with a serial number of|

W5100001 to W5199999

SFC-21-7CV| with a serial number of|

W5200001 to W5299999

Always use the entire serial number listed on the serial number tag when referring to this product.

Section 1 R

GENERAL INFORMATION

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 Authorized Scag Power  Equipment 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.

THE REPLACEMENT OF ANY PART ON THIS  PRODUCT BY OTHER THAN THE MANUFACTURER’S  A U T H O R I Z E D R E P L A C E M E N T PA R T M AY 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  on the right side on the frame. See Figure 1-1.

Figure 1-1. Mower Serial Number Plate Location

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. Be aware that using  attachments with the mower may affect stability. Be sure to follow the directions found in the operator’s manual. See  Section 8, Paragraph 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 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, transmissions
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.

1.4 ASSEMBLY INSTRUCTIONS

1. In an open area, remove the grass bag, hardware  bag and mower from the packaging.

2. With help from an assistant, loosen the two (2) 3/8- 16 elastic flange nuts identified and raise the handle  bar assembly. See Figure 1-2.

Figure 1-2. Lift the Handle Bar Assembly

3. While holding the handle bar assembly in place,  secure using four (4) 3/8-16 x 3/4″ carriage bolts  and four (4) 3/8-16 elastic flange nuts provided as  shown tighten mounting hardware and pivot bolts  See Figure 1-3.

Figure 1-3. Secure the Handle Bar Assembly

4. The engine installed on this mower is shipped  “dry” from the factory. Add the recommended  amount of oil to the engine per the engine operator’s  manual supplied with this mower.

5. Install the fabric grass collection bag over the bag  frame weldment. See Figure 1-4.

Figure 1-4. Install the Fabric Grass Collection Bag

6. Secure the fabric grass collection bag to the frame  weldment using the eight (8) hooks located on the  each side. See Figure 1-5.

Figure 1-5. Install the Grass Collection Bag

7. Install the grass collection bag onto the back of the  mower.

8. Assembly is now complete on the mower.

1.5 SYMBOLS

SAFETY INFORMATION

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 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.

A replacement manual is available from your Authorized  Scag Power Equipment 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

1. NEVER allow children to operate this 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. 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. A Spanish decal kit is available for  this model. See your local Authorized Scag Power  Equipment Dealer.

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 and substantial slip-resistant footwear.  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.

10. 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.

11. 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.

12. DO NOT start the engine until any spilled fuel has  been cleaned up or has evaporated.

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 7.3 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.

16. Do not operate without the discharge plug installed  or with the grass catcher installed.

17. Check the blade mounting bolts at frequent intervals  for proper tightness.

2.4 TESTING THE BLADE STOP SYSTEM

The blade stop system should be tested each time before  using the machine. Check that the blade stops within 3  seconds of releasing the control bar as described below.

-IMPORTANT

If the blade does not stop within 3 seconds of  releasing the control bar, contact your local  Authorized Scag Power Equipment Dealer  immediately to have the blade stop system  repaired.

TEST USING THE GRASS BAG

1. Remove the rear discharge plug.

2. Install the empty grass bag onto the rear of the  machine.

3. Start the engine. Allow the engine to warm up before  engaging the blade.

4. Engage the blade.

-NOTE
The bag should begin to inflate, indicating that the  blade is rotating.

5. Watch the bag and release the control bar.

6. Immediately start counting out 3 seconds and watch  for the bag to deflate.

-NOTE
If the bag does not deflate within 3 seconds of  releasing the control bar, the blade stop system  could be deteriorating or out of adjustment. Contact your local Authorized Scag Power Equipment  Dealer immediately to have the blade stop system  repaired.

7. Shut the engine off and wait for all moving parts to  stop.

TEST NOT USING THE GRASS BAG

1. Remove the grass bag.

2. Install the rear discharge plug.

3. Move the machine onto a paved surface such as  a driveway, sidewalk, parking lot or patio next to a  section of grass.

4. Position the machine next to a patch of grass and  approximately 3″ away. See Figure 2-1.

5. Start the engine. Allow the engine to warm up before  engaging the blade.

6. Engage the blade.

-NOTE
The grass next to the the machine should start to  move from the air flow, indicating that the blade  is rotating.

Figure 2-1. Blade Stop

7. Watch the grass and release the control bar.

8. Immediately start counting out 3 seconds and watch  for the grass to stop moving.

-NOTE
If the grass does not stop moving within 3 seconds  of releasing the control bar, the blade stop system  could be deteriorating or out of adjustment. Contact  your local Authorized Scag Power Equipment  Dealer immediately to have the blade stop system  repaired.

9. Shut the engine off and wait for all moving parts to  stop.

2.5 OPERATION CONSIDERATIONS

1. Know the function of all controls and how to stop  quickly.

WARNING
DO NOT operate on steep slopes. ALWAYS  FOLLOW OSHA APPROVED OPERATION.

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. Do not mow or operate on excessively steep slopes.  Poor footing could cause a slip and fall accident.

4. To prevent tipping or loss of control, start and stop  smoothly, avoid unnecessary turns and travel at  reduced speed.

5. Immediately stop the machine if you lose drive  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. Start the engine when the blade control bar is in  the neutral lock position, and the drive control bar is  disengaged.

8. If the mower discharge ever plugs, shut off the  engine, remove the spark plug wire, 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 blade has stopped  turning.

9. Be alert for holes, rocks, roots and other hidden  hazards in the terrain. Use caution when operating  near 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 blade engaged.

15. Take all possible precautions when leaving the  machine unattended, such as disengaging the  mower, and stopping the engine.

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 the cutter blade and  moving parts. Contact can injure.

19. Transport the mower using a heavy duty trailer  or truck. Ensure 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.

21. When transporting the mower, make sure the drive  control bar is in neutral, the blade control bar is in  the neutral lock position, the engine is off, 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.

23. Use care when approaching blind corners, shrubs,  trees, or other objects that may obscure vision.

24. NEVER leave the machine running unattended.

2.6 MAINTENANCE CONSIDERATIONS  AND 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. Place the drive control bar in neutral, engage the  parking brake, place the blade control bar in the  neutral lock position, stop engine and disconnect  the 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. Remove spark plug wire before making any repairs.

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.

8. NEVER allow untrained personnel to service the

machine.

9. Use care when checking blades. Use a Blade Buddy

(p/n 9212), 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.

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.

2.7 USING A SPARK ARRESTOR

The engine in this machine 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.

2.9 SAFETY AND INSTRUCTIONAL DECALS

3 SPECIFICATIONS

3.1 ENGINE

General Type……………………………………………………………………………………Heavy Duty Industrial/Commercial Gasoline Model:

Scag Model SFC-21-4GX……………………………………………………………………………………………………HONDA GXV160 Scag Model SFC-21-5CV…………………………………………………………………………………..Kohler Command Pro CV173 Scag Model SFC-21-7CV…………………………………………………………………………………..Kohler Command Pro CV224

Displacement:

HONDA GXV160……………………………………………………………………………………………………………………………….163cc Kohler Command Pro CV173………………………………………………………………………………………………………………173cc Kohler Command Pro CV224………………………………………………………………………………………………………………224cc

Type………………………………………………………………………………………….4 Cycle Gasoline, Single Cylinder, Vertical Shaft Cylinders……………………………………………………………………………………………………………………… 1 with Cast Iron Sleeve Governor…………………………………………………………….. Mechanical Type with Variable Speed Control Set At 3300 RPM Idle Speed:

Kolher Command Pro…………………………………………………………………………………………………………………. 1500 RPM Fuel Filter…………………………………………………………………………………………………………………………….. In-Line Fuel Filter Fuel………………………………………………………………………….. Non-Leaded Gasoline with a Minimum Octane Rating of 87 Lubrication………………………………………………………………………………………………………. Dual – Full Pressure and Splash Starter………………………………………………………………………………………………………………………………………. Recoil Starter Belts……………………………………………………………………………………………………………..Kevlar cord. Adjustable Fixed Idler

3.2 CONTROLS

Starter………………………………………………………………………………………………………………………………………. Recoil Starter Engine Contol…………………………………………………………………………………………………………………Throttle / Choke Lever Cutter Blade Control…………………………………………………………Blade Control Bar controlled Blade Brake Clutch (BBC) Drive Control……………………………………………………………Speed Control and Drive Control Bar controlled Transmission

3.3 MOWER

Drive System ………………………………………………………………………………………………………………… 3-Speed Transmission Wheels:

(2) Front……………………………………………………………………………………………………………………………………….. 9 x 2.25 (2) Drive……………………………………………………………………………………………………………………………………….. 10.5 x 3 Fuel Tank ………………………. 0.37 Gallon (5CV) or 1 Gallon Polyethylene Tank (7CV) with Large Opening and Fuel Cap Travel Speed:

Forward ………………………………………………………………………………………………………………………….. 0 up to 4.25 MPH -NOTE- The machine will travel up to 4.25 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…………………………………………………………………………………………………….Adjustable, Anti-Scalping, Hybrid Design Construction …………………………………….. 14-Gauge deck with 14-Guage replaceable guards for strength and longevity True Cutting Width:

21 ……………………………………………………………………………………………………………………………………….21″ (53.34 cm) Cutting Height Adjustment……………………………………………………..Lever Adjustment from 1.5″ to 4.5″ in 1/2″increments Cutter Blade…………………………………………………………………………………. 0.1345 in. Thick, Milled Edge, Wear Resistant Blade Engagement…………………………………………………………..Blade Control Bar controlled Blade Brake Clutch (BBC) Connected to the Cutter Blade

Rear Discharge Opening……………………………………………………………………………………..Extra Wide Discharge Opening Clutch Type……………………………………………………………………………………………..Heavy Duty Blade Brake Clutch (BBC)

3.5 WEIGHTS AND DIMENSIONS

Length w/handle in lowest position……………………………………………………………………………………………………….. 68-1/2″ Length w/handle in highest position …………………………………………………………………………………………………………… 63″ Length w/handle in storage / transport position……………………………………………………………………………………………. 41″ Tracking Width…………………………………………………………………………………………………………………………………… 21-1/4″ Overall Width…………………………………………………………………………………………………………………………………….. 23-1/4″ Lowest Operating Height…………………………………………………………………………………………………………………….. 32-3/4″ Max Operating Height ………………………………………………………………………………………………………………………… 43-1/2″ Operating Weight: Bagging ……………………………………………………………………….136# (4GX), 138# (5CV), 145# (7CV) Operating Weight: Mulching ………………………………………………………………………131# (4GX), 133# (5CV), 140# (7CV)

3.6 PRODUCTIVITY

Cutting Width…………………………………………………………………………………………………………………………………………….21″

4 OPERATING INSTRUCTIONS

WARNING

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.

4.1 CONTROLS AND INSTRUMENT  IDENTIFICATION

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.

Figure 4-1. Controls and Instruments

1. Recoil Start (Figure 4-1). The recoil start is used to  start the engine.

2. Blade Control Bar (Figure 4-1). Use to engage  and disengage the cutter blade drive system.  Pulling the control bar will engage the cutter blades. Releasing the control bar will disengage the cutter  blades.

3. Engine Throttle / Choke Control (Figure 4-1).  Use to control the engine speed and choke control.  Pushing the lever forward increases engine speed. Pulling the lever back decreases engine speed.  Push the lever all the way forward past the detent to  engage the choke when starting a cold engine. Full back position is the STOP position. Full forward to  detent is the cutting position.

4. Drive Control Bar (Figure 4-1). Use to engage and  disengage the mower forward drive system.

5. Speed Select Control (Figure 4-1). Use to set the  maximum forward speed.

6. Blade Control Lock (Figure 4-1). Use to lock the  blade control bar in the neutral position.

7. Grass Bag (Figure 4-1). Use to bag and collect  grass clippings while mowing.

8. Fuel Tank Cap (Figure 4-1). Use to fill the fuel tank  with fuel.

9. Fuel Shutoff Valve (Figure 4-1). Use to shut off fuel  supply to the engine.

10. Cutting Height Adjustment Lever (Figure 4-1).  Use to set the cutter deck at the desired cutting  height.

11. Fuel Filter (Figure 4-1). Use to filter the fuel supply  to the engine. Refer to engine owner’s manual  supplied with this unit when servicing.

12. Spark Plug (Figure 4-1). Use to supply spark to the  engine. Refer to engine owner’s manual supplied  with this unit when servicing.

13. Air Filter (Figure 4-1). Use to filter the air supply to  the engine. Refer to engine owner’s manual supplied  with this unit when servicing.

14. Oil Filter (Figure 4-1). Use to filter the oil supply in  the engine. Refer to engine owner’s manual supplied  with this unit when servicing.

15. Oil Fill / Dipstick (Figure 4-1). Use to add and  check the level of oil in the engine. Refer to engine  owner’s manual supplied with this unit when servicing.

16. Rear Discharge Plug (Figure 4-1). Use to shut  off the discharge of grass clippings out of the rear  discharge opening. Install when mulching.

17. Rear Deflector (Figure 4-1). Use to hold the  grass bag and rear discharge plug in place during  operation.

4.2 TESTING THE BLADE STOP SYSTEM

The blade stop system should be tested each time before  using the machine. Check that the blade stops within 3  seconds of releasing the control bar as described below.

WARNING

If the blade does not stop within 3 seconds  of releasing the control bar after making an  adjustment to the blade brake cable, the blade  stop system may be deteriorating and if ignored  could result in an unsafe operating condition.  Contact your local Authorized Scag Power  Equipment Dealer immediately to have the blade  stop system inspected and repaired.

TEST USING THE GRASS BAG

1. Remove the rear discharge plug.

2. Install the empty grass bag onto the rear of the  machine.

3. Start the engine. Allow the engine to warm up before  engaging the blades.

4. Engage the blades.

-NOTE
The bag should begin to inflate, indicating that the  blades are rotating.

5. Watch the bag and release the control bar.

6. Immediately start counting out 3 seconds and watch  for the bag to deflate.

-NOTE
If the bag does not deflate within 3 seconds of  releasing the control bar, the blade stop system  could be deteriorating or out of adjustment. Contact your local Authorized Scag Power Equipment  Dealer immediately to have the blade stop system  repaired.

7. Shut the engine off and wait for all moving parts to  stop.

TEST NOT USING THE GRASS BAG

1. Remove the grass bag.

2. Install the rear discharge plug.

3. Move the machine onto a paved surface such as  a driveway, sidewalk, parking lot or patio next to a  section of grass.

4. Position the machine next to a patch of grass and  approximately 3″ away. See Figure 4-2.

5. Start the engine. Allow the engine to warm up before  engaging the blades.

6. Engage the blade.

-NOTE
The grass next to the the machine should start to  move from the air flow, indicating that the blade  is rotating.

7. Watch the grass and release the control bar.

8. Immediately start counting out 3 seconds and watch  for the grass to stop moving.

Figure 4-2. Blade Stop Test

-NOTE
If the grass does not stop moving within 3 seconds  of releasing the control bar, the blade stop system  could be deteriorating or out of adjustment. Contact  your local Authorized Scag Power Equipment  Dealer immediately to have the blade stop system  repaired.

9. Shut the engine off and wait for all moving parts to  stop.

WARNING

Never operate the mower with the blade stop  system malfunctioning. Do not disengage or  bypass any part of the blade stop system; injury  to yourself and others or property damage could  result.

4.3 INITIAL RUN-IN PROCEDURES

FIRST DAY OF USE OR APPROXIMATELY 8 HOURS

1. Check all belts for proper alignment and wear at 2, 4  and 8 hours.

2. Change the engine oil only after the first 8 hours of  operation. Refer to engine owner’s manual supplied  with this unit when servicing.

3. Test the blade stop system daily before operation.  (See Section 4.2)

4. Inspect the air filter.

5. Check for loose hardware. Tighten as needed.

6. Inspect the cutter blade and service as necessary.

7. Check the parking brake function.

8. Check clutch cable function.

4.4 STARTING THE ENGINE

CAUTION

DO NOT USE STARTING FLUIDS. Use of starting  fluids in the air intake system may be potentially  explosive or cause a “runaway” engine condition  that could result in engine damage and/or  personal injury.

1. Be sure the fuel shutoff valve, located by the fuel  tank, is completely open. (See Section 7.3.)

2. Move the engine throttle control to full throttle. If  the engine is cold, choke the engine as needed by  moving the throttle / choke control lever fully forward  past the detent.

3. Slowly pull starter handle until just past compression-STOP! Return starter handle then  firmly pull straight out to avoid excessive rope wear from starter rope guide.

4. Gradually return choke control to OFF position after  engine starts and warms up. Allow engine to warm  before operating the mower.

4.5 GROUND TRAVEL

– IMPORTANT –
If you are not familiar with the operation of a  machine with a variable speed transmission, the  ground speed operation should be learned and  practiced in an open area, away from buildings,  fences, or obstructions.

Learn the operation on flat ground before operating  on slopes.

Start practicing with a slow engine speed and slow  forward travel.

Learn to feather the drive control bar to obtain a  smooth operating action.

Practice operating the mower until you are  comfortable with the controls before proceeding  to mow.

FORWARD TRAVEL

Figure 4-3. Travel Controls

1. Select the desired speed using the speed control  lever.

2. Pull upward on the drive control bar.

3. Forward travel.

To travel forward with the mower, slowly pull upward on the  drive control bar. The further the drive control bar is pulled  upward the greater the forward speed will be. To decrease the speed, slowly release the drive control bar.

To stop the forward travel, release the drive control bar  allowing it to return back to the neutral position.

– NOTE –
Smooth operation of the drive control bar will  produce smooth mower operation. While learning  the operation of the mower, keep the travel speed low.

**CAUTION**
Disengage power to the mower before backing up.  Do not mow when backing up unless absolutely  necessary and then only after observation of the  entire area behind the mower.

CAUTION
Before backing up, observe the rear for persons  and obstructions. Clear the area before backing  up. Possible injury or property damage could  occur.

4.6 ENGAGING THE CUTTER BLADES

1. Set the throttle at about 3/4 speed. Do not attempt to  engage the deck drive at high speed as this shortens  the belt life — use only moderate engine speed  when engaging the cutter blades.

2. Push and hold the blade control lock lever forward to  release the blade control bar. See Figure 4-4.

3. Quickly pull the blade control bar to the handle and  release the blade control lock lever. The cutter blade  should engage.

Figure 4-4. Blade Control Bar Engagement

– NOTE –
A squealing noise may be heard when engaging  or disengaging the deck drive. It is caused by the  clutch plates meshing as the mower comes up to  speed. This is normal. If the noise is excessive,  Contact your local Authorized Scag Power  Equipment Dealer immediately to have the clutch  system repaired.

4. To disengage the cutter blade, release the blade  control bar. The blade control lock lever resets to  lock the blade control bar.

5. Always operate the engine at full throttle to properly  maintain cutting speed. If the engine starts to lug  down, reduce the forward speed and allow the  engine to operate at maximum RPM.

4.7 SLOPE OPERATION

WARNING

DO NOT operate on excessively steep slopes.  ALWAYS FOLLOW OSHA APPROVED OPERATION.

Avoid mowing in wet conditions. Wet grass or  leaves can cause serious injury if you slip and  contact the blade.

1. 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.

2. To prevent tipping or loss of control, do not start or  stop suddenly, avoid unnecessary turns and travel at  reduced speed. If tires lose traction, disengage the  blade and proceed slowly off the slope.

3. Avoid sudden starts when mowing on slopes.

4. Travel across the slope whenever possible. Never  up and down the slope.

4.8 PARKING THE MOWER

1. Park the machine on a flat, level surface only. Do not  park the machine on an incline.

2. Disengage the cutter blade.

3. Slow the engine to idle speed.

4. Pull the throttle / chock control back to the OFF  position.

4.9 AFTER OPERATION

1. Always shut the engine off, wait for all moving  parts to stop, and allow the mower to cool before  adjusting, servicing, storing or cleaning the machine.

2. Wash the entire mower after each use. Do not  use high pressure spray or direct the spray onto  components.

– IMPORTANT –
Do not wash a hot or running engine. Cold water  will damage the engine. Use compressed air to  clean the engine if it is hot.

3. Keep the entire mower clean to inhibit serious heat  damage to the engine or transmission.

4. Check the drive belt for proper alignment and any  signs of wear. Correct and adjust if necessary.

DANGER
To avoid injury from burns, allow the mower  to cool before removing the fuel tank cap and  refueling.

5. Fill the fuel tank with fresh, clean fuel at the  beginning of every day of operation. See Engine  Owner’s Manual for proper octane requirements.

4.10 REMOVING CLOGGED MATERIAL  DANGER

ROTATING BLADE

NEVER PUT YOUR HANDS INTO THE DISCHARGE  CHUTE FOR ANY REASON!

Shut off the engine and remove the spark plug  wire and only then use a stick or similar object to  remove material if clogging has occurred.

1. If the discharge becomes clogged, shut off the  engine and remove the spark plug wire.

2. Using a stick or similar item, dislodge the clogged  material. Then resume normal mowing.

4.11 MOVING MOWER WITH ENGINE  STOPPED

To “free-wheel” or move the mower around without the  engine running, move the mower by hand.

4.12 RECOMMENDATIONS FOR MOWING

1. Do not mow with a dull blade. A dull blade will  tear grass, resulting in poor lawn appearance and  reduced mowing power.

WARNING
DO NOT operate without the Mulching plug, or  entire Grass Catcher properly installed.

2. When mulching, the rear discharge plug must be  completely installed.

3. When bagging grass, the rear discharge plug must  be removed.

4. Cut grass when it is dry and not too tall. Do not cut  grass too short (cut off 1/3 or less of existing grass  for best appearance). Mow frequently.

5. Keep mower and discharge chute clean.

6. When mowing wet or tall grass, mow the grass  twice. Raise the mower to the highest setting for  the first pass and then make a second pass to the desired height.

7. Use a slow travel speed for trimming purposes.

8. Operate the engine at full throttle for best cutting.  Mowing with a lower RPM causes the mower to tear  the grass. The engine is designed to be operated at  full speed.

9. Use the alternate stripe pattern for best lawn  appearance. Vary the direction of the stripe each  time the grass is mowed to avoid wear patterns in  the grass.

4.13 ADJUSTING CUTTING HEIGHT

The mower deck can be adjusted from a height of 1-1/2  inches to 4-1/2 inches at 1/2-inch intervals. To adjust the

cutting height:

WARNING

DO NOT adjust the cutting height with the mower  blade rotating. Disengage the power to the cutter blades and then adjust cutting height.

1. Disengage the power to the cutter blade.

2. Apply the park brake.

3. Lift up and forward on the cutting height adjustment levers at all four (4) locations. See Figure 4-5.

4. Stop each lever on the cutting height index at the  desired cutting height. See Figure 4-5. All four (4)  levers should be set at the same cutting height.

Figure 4-5. Adjusting Cutting Height

TROUBLESHOOTING CUTTING CONDITIONS

CONDITION

|

CAUSE

|

CURE

---|---|---

STRINGERS – OCCASIONAL  BLADES OF UNCUT GRASS
Width of Deck

|

Low engine RPM

|

Run engine at full RPM

Ground speed too fast

|

Slow speed to adjust for conditions

Wet grass

|

Cut grass after it has dried out

Dull blades, incorrect sharpening

|

Sharpen blades

Deck plugged, grass accumulation

|

Clean underside of deck

Belts slipping

|

Adjust belt tension

STREAKING – STRIPS OF  UNCUT GRASS IN CUTTING  PATH

|

Dull, worn blades

|

Sharpen blades

Incorrect blade sharpening

|

Sharpen blades

Low engine RPM

|

Run engine at full RPM

Belt slipping

|

Adjust belt tension

Deck plugged, grass accumulation

|

Clean underside of deck

Ground speed too fast

|

Slow speed to adjust for conditions

Wet grass

|

Cut grass after it has dried out

Bent blades

|

Replace blades

STREAKING – STRIPS OF  UNCUT GRASS BETWEEN  CUTTING PATHS

|

Not enough overlapping between rows

|

Increase the overlap of each pass

TROUBLESHOOTING CUTTING CONDITIONS (CONT’D)

CONDITION

|

CAUSE

|

CURE

---|---|---

U N E V E N C U T O N F L AT  GROUND – WAVY HIGH-LOW  APPEARANCE, SCALLOPED CUT, OR ROUGH CONTOUR

|

Lift worn from blade

|

Replace blade

Blade upside down

|

Mount with cutting edge toward ground

Deck plugged, grass accumulation

|

Clean underside of deck

Too much blade angle (deck pitch)

|

See your authorized SCAG dealer

Deck mounted improperly

|

See your authorized SCAG dealer

Bent spindle area

|

See your authorized SCAG dealer

Dull blade

|

Sharpen blade

U N E V E N C U T O N  UNEVEN GROUND – WAVY  APPEARANCE, HIGH-LOW  SCALLOPED CUT, OR ROUGH  CONTOUR

|

Uneven ground

|

May need to reduce ground speed, raise  cutting height, and/or change direction  of cut

SLOPING RIDGE ACROSS  WIDTH OF CUTTING PATH

|

Wheels uneven

|

See your authorized SCAG dealer

Deck mounted incorrectly

|

See your authorized SCAG dealer

Deck not level side-to side

|

See your authorized SCAG dealer

|

20

Section 5 R

TROUBLESHOOTING CUTTING CONDITIONS (CONT’D)

CONDITION

|

CAUSE

|

CURE

---|---|---

SCALPING – BLADES HITTING  DIRT OR CUTTING VERY  CLOSE TO THE GROUND

|

Bent spindle mounting area

|

See your authorized SCAG dealer

Ground speed too fast

|

Slow speed to adjust for conditions

Cutting too low

|

May need to reduce ground speed, raise  cutting height, change direction of cut,  and/or change pitch and level

Rough terrain

|

May need to reduce ground speed, raise  cutting height, and/or change direction  of cut

Wet grass

|

Cut grass after it has dried out

STEP CUT – RIDGE IN CENTER  OF CUTTING PATH

|

Blades not mounted evenly

|

See your authorized SCAG dealer

Bent blade

|

Replace blade

Internal spindle failure

|

See your authorized SCAG dealer

Mounting of spindle incorrect

|

See your authorized SCAG dealer

SLOPE CUT – SLOPING  RIDGES ACROSS WIDTH OF  CUTTING PATH

|

Bent spindle mounting area

|

See your authorized SCAG dealer

Internal spindle failure

|

See your authorized SCAG dealer

Bent deck housing

|

See your authorized SCAG dealer

ADJUSTMENTS

6.1 SELF-PROPEL DRIVE ADJUSTMENTS

An adjustment to the self-propel system should be made

whenever a new cable is installed.

SPEED SELECT CONTROL CABLE  ADJUSTMENT

1. Shut the engine off and wait for all moving parts to  stop.

2. Disconnect the spark plug wire from the spark plug.

3. If the grass catcher bag is installed, remove it from  the mower.

4. Using a piece of scrap material, broom handle or  other object wider that the handle bars, lift and  support the rear cover to gain access to the rear of  the mower. See Figure 6-1.

Figure 6-1. Lift and Support Rear Cover

5. Remove the two bolts securing the transmission  access cover to the mower.

6. Remove the transmission access cover and remove  any debris that has collected on the transmission.  See Figure 6-2.

Figure 6-2. Transmission Access

7. Loosen the clamp securing the speed select cable to  the transmission. See Figure 6-2.

8. Move the speed select control all the way back. See  Figure 6-3.

9. On the transmission, move the control arm all the
way to the left. See Figure 6-4.

10. Adjust the cable until there is no slack in the cable
between the control arm and cable sheathing. See
Figure 6-4.

Figure 6-4. Transmission Control Arm and Spring

11. Hold the cable firmly and tighten the clamp.

12. Reinstall the transmission access cover and secure
with the two bolts.

13. Test the operation of the speed select control. The
machine should increase and decrease speed as the
speed select control is moved to each position. The
machine must be at a complete stop before shifting
between gears.

WARNING
To avoid bodily injury and damage to the
transmission, the machine must be at a full stop
before shifting between gears..

– NOTE –
If making the adjustment as outlined does not allow
for proper speed select operation, contact your
local Authorized Scag Power Equipment Dealer.

DRIVE CONTROL BAR CABLE ADJUSTMENT

1. Shut the engine off and wait for all moving parts to
stop.

2. Disconnect the spark plug wire from the spark plug.

3. With the drive control bar released, loosen the clamp
securing the speed select cable to the drive control
bar. See Figure 6-5.

4. Adjust the cable until there is a small amount of
slack in the cable between the drive control bar and
cable sheathing. See Figure 6-5.

5. Test the operation of the blade control bar. The
cutter blade should not turn when the blade control
bar is released.

– NOTE –
If making the adjustment as outlined does not allow
for proper cutter blade operation, contact your local
Authorized Scag Power Equipment Dealer.

1. Shut the engine off and wait for all moving parts to  stop.

2. Disconnect the spark plug wire from the spark plug.

3. With the drive control bar released, loosen the clamp  securing the speed select cable to the drive control  bar. See Figure 6-5.

4. Adjust the cable until there is a small amount of  slack in the cable between the drive control bar and  cable sheathing. See Figure 6-5.

5. Hold the cable firmly and tighten the clamp.

6. Test the operation of the drive control bar. The  machine should not move when the drive control bar  is released.

7. Select a speed using the speed select control. The  machine must be at a complete stop before shifting  between gears.

WARNING
To avoid bodily injury and damage to the  transmission, the machine must be at a full stop  before shifting between gears.

8. The machine should increase and decrease speed  as the drive control bar is pulled in or released.

– NOTE –

If making the adjustment as outlined does not allow  for proper self-propel operation, contact your local  Authorized Scag Power Equipment Dealer.

6.2 THROTTLE CONTROL AND CHOKE  ADJUSTMENTS

These adjustments must be performed by your Authorized  Scag Power Equipment Dealer to ensure proper and  efficient running of the engine. Should either need  adjustment, contact your local authorized Scag service  center.

6.3 TRANSMISSION DRIVE BELT

WARNING
Before removing any guards, shut the engine off  and remove the spark plug wire from the spark  plug.

The transmission drive belt has a fixed idler and should be  adjusted after the first 2, 4, 8 and 10 hours of operation,  the belt should be checked for proper alignment and wear. Thereafter, check the belt after every 40 hours of operation  or weekly, whichever occurs first.

6.4 BLADE CONTROL BAR CABLE  ADJUSTMENT

 WARNING

Before removing any guards, shut the engine off  and remove the spark plug wire from the spark  plug. Wait for all moving parts to come to a  complete stop before beginning work.

1. Shut the engine off and wait for all moving parts to  stop.

2. Disconnect the spark plug wire from the spark plug.

3. With the blade control bar released, loosen the  clamp securing the blade control cable to the blade  control bar. See Figure 6-6.

4. Adjust the cable until there is a small amount of  slack in the cable between the blade control bar and  cable sheathing. See Figure 6-6.

Figure 6-6. Deck Drive Cable Adjustment

5. Test the operation of the blade control bar. The  cutter blade should not turn when the blade control  bar is released.

– NOTE –

If making the adjustment as outlined does not allow  for proper cutter blade operation, contact your local  Authorized Scag Power Equipment Dealer.

6.5 CUTTER DECK ADJUSTMENTS

The mower is designed to bag or mulch the grass clippings. If additional information or service is needed, contact your  Authorized Scag Power Equipment Dealer.

MULCHING THE CLIPPINGS

To convert from bagging grass and prepare the mower to  mulch the grass clippings:

1. Lift the rear cover and remove the grass collection  bag from the mower. See Figure 6-7.

Figure 6-7. Mulch Conversion

2. Insert the rear discharge plug into the cutter deck.  See Figure 6-7.

BAG THE CLIPPINGS

To convert and prepare the mower back to bagging the  grass clippings:

1. Lift the rear cover and remove the rear discharge  plug from the cutter deck. See Figure 6-8.

2. Reinstall the grass collection bag onto the mower.  See Figure 6-8.

Figure 6-8. Bagging Grass.

7 MAINTENANCE

7.6 MAINTENANCE CHART – RECOMMENDED SERVICE INTERVALS

• Perform these maintenance procedures more frequently under extreme dusty or dirty conditions

7 ENGINE OIL

A. CHECKING ENGINE CRANKCASE OIL  LEVEL

The engine oil level should be checked after every 8 hours  of operation or daily as instructed in the Engine Owner’s  Manual furnished with this mower.

B. CHANGING ENGINE CRANKCASE OIL

After the first 8 hours of operation, change the engine  crankcase oil. Thereafter, change the engine crankcase  oil after every 50 hours of operation or yearly, whichever  occurs first. Refer to the Engine Owner’s Manual furnished  with this mower for instructions.

1. Shut off the engine and wait for all moving parts to  stop.

2. Disconnect the wire from the spark plug.  3. Drain the fuel from the fuel tank.

4. Place a suitable drain pan under the dipstick/oil  drain.

5. Clean around the dipstick.

6. Remove the dipstick by rotating the cap  counterclockwise and pulling it out.

7. Tip the machine onto its right side (air filter up) to  drain the oil into the drain pan.

8. After draining the oil, return the machine to the  operating position.

9. Fill the crankcase to the correct level on the dipstick  with fresh oil. Refer to the Engine Owner’s Manual  furnished with this mower for oil capacity.

10. Insert the dipstick into the filler neck and rotate the  cap clockwise until it is tight.

11. Wipe up any spilled oil.

12. Recycle the used oil according to local codes.

C. CHANGING ENGINE OIL FILTER

Replace the oil filter after every 100 hours of operation.  Refer to Engine Owner’s Manual for instructions.

Figure 7-1. Oil Fill / Dipstick, Oil Filter

7.8 ENGINE FUEL SYSTEM

 DANGER

To avoid injury from burns, allow the mower  to cool before removing the fuel tank cap and  refueling.

A. FILLING THE FUEL TANK

See Engine Owners Manual for machines equipped with  .37 gallon tank.

Use clean, fresh unleaded gasoline with a minimum octane  rating of 87 and a maximum of 10% Ethanol.

Fill to the bottom of the filler neck (approximately 1 gallon for  machines equipped with 1 gallon fuel tank) at the beginning  of each operating day. See Figure 7-2.

DO NOT over fill. The empty space in the fuel tank allows  the fuel to expand. Overfilling the fuel tank may result in  fuel leakage, damage to the engine and/or damage to the  machine’s emissions system.

DO NOT use E85 Fuel. Using E85 Fuel will cause severe  damage to the engine.

To avoid personal injury or property damage, use extreme  care in handling gasoline. Gasoline is extremely flammable  and the vapors are explosive.

Extinguish all cigarettes, cigars, pipes and other sources  of ignition.

Figure 7-2. Fuel Tank Fill Level

1. Use only an approved gasoline container.

2. NEVER remove the gas cap or add fuel with the  engine running. Allow the engine to completely cool  before fueling.

3. NEVER fuel the machine indoors or in an enclosed  trailer.

4. DO NOT start the engine until any spilled fuel has  been cleaned up or has evaporated.

5. NEVER store the machine or fuel container where  there is an open flame, spark or pilot light such as on  a water heater or other appliances.

6. NEVER fill containers inside a vehicle or on a  truck or trailer bed with a plastic liner. Always place  containers on the ground away from your vehicle before filling.

7. Remove the machine from the truck or trailer and  fuel on level ground. If this is not possible, then  refuel the machine with a portable container, rather  than from a gasoline dispenser nozzle.

8. Keep the nozzle in contact with the rim of the fuel  tank or container opening at all times until fueling is  complete. Do not use a nozzle lock-open device.

9. If fuel is spilled on clothing, change clothing  immediately and wash affected skin.

10. NEVER over fill the fuel tank. Replace gas cap and  tighten the fuel cap until it ratchets.

B. REPLACING IN-LINE FUEL FILTER  ELEMENTS

The engine fuel filter should be replaced as recommended  by the engine manufacturer. Refer to Engine Owner’s  Manual.

1. Close the shut-off valve. See Figure 7-3.

2. Remove and replace the engine fuel filter. Open the  fuel shut-off valve.

Figure 7-3. Fuel Filter

7.9 ENGINE AIR CLEANER

A. CLEANING AND/OR REPLACING AIR  CLEANER ELEMENT

For any air cleaner, the operating environment dictates the  air cleaner service periods. Service and clean the air filter  pre-cleaner after every 50 hours of operation. Replace  the air cleaner element and pre-cleaner after every 300  hours or yearly, whichever comes first. Refer to Engine  Owner’s Manual.

– NOTE –

In extremely dusty conditions it may be necessary  to check the element once or twice daily to prevent  engine damage.

1. Lift up on the latch securing the air cleaner cover to  the air cleaner assembly. See Figure 7-4.

2. Remove and inspect the air filter. Replace as  recommended by the engine manufacturer. Refer to  Engine Owner’s Manual.

3. Replace the air cleaner cover and secure.

Figure 7-4. Engine Air Filter

7.10 DRIVE BELT

The transmission drive belt has a fixed idler and should be  adjusted after the first 2, 4, 8 and 10 hours of operation.  The belt should be checked for proper alignment and wear.  Thereafter, check the belts after every 40 hours of operation  or weekly, whichever occurs first.

– NOTE –

If you experience frequent belt wear or breakage,  see your authorized Scag service center for belt  adjustment.

7.11 CUTTER BLADE

A. BLADE INSPECTION

1. Remove the spark plug wire before servicing the  blade.

2. Raise the mower deck to the highest position.  WARNING

Mower blades are sharp. Always wrap blades,  wear proper hand and eye protection when  working with cutter blades.

3. Check the cutter blade for straightness. If the cutter  blade appear bent, it will need to be replaced.

4. Check the cutter blade for wear. If any part of the  cutter blade is worn to 1/2 its original thickness,  replace the cutter blade.

WARNING

Do not attempt to straighten a bent blade, and  never weld a broken or cracked blade. Always  replace it with a new blade to assure safety.

5. If a blade cutting edge is dull or nicked, it should be  sharpened. Remove the blades for sharpening. See  “Blade Replacement.”

– NOTE –

Keep the blades sharp. Cutting with dull blades  not only yields a poor mowing job, but slows the  cutting speed of the mower and causes extra wear  on the engine and the blade drive by pulling hard.

B. BLADE SHARPENING

– NOTE –

If possible, use a file to sharpen the blade. Using  a wheel grinder may burn the blade.

– NOTE –

DO NOT sharpen the blades beyond 1/3 of the  width of the blade. See Figure 7-5.

1. Sharpen the cutting edge at the same bevel as the  original. See Figure 7-5. Sharpen only the top of the  cutting edge to maintain sharpness.

Figure 7-5. Blade Sharpening

2. Check the balance of the blade. If the blade is out  of balance, vibration and premature wear can occur.  The cutter blade should be balanced to 1-1/2 oz-in.  See your Authorized Scag Power Equipment Dealer  for blade balancing or special tools, if you choose to  balance your own blades.

C. BLADE REPLACEMENT

WARNING

Mowers blades are sharp. Always wrap blades,  wear proper hand and eye protection when  working with cutter blades.

1. Shut the engine off and wait for all moving parts to  stop.

2. Disconnect the spark plug wire from the spark plug. 3. Raise the mower deck to the highest position.

4. Secure the cutter blade to prevent it from rotating,  remove the blade attaching bolts. Remove the cutter  blade, bolts and flatwashers from the machine.  See Figure 7-6.

  CAUTION

Inspect the cutter blade washers for wear and/or  cupping. Replace the worn parts. Worn washers  will not allow proper tightening of the cutter blade  and can lead to cutter blade failure, personal  injury or property damage.

5. To install the new cutter blade, put the flatwashers  onto the blade bolts, and install the bolts into the  holes in the cutter blade.

CUTTER BLADE

FLATWASHER

FLATWASHER

3/8-16 x 3/4″ HEX HEAD BOLT

TORQUE TO 39 FT/LBS

Figure 7-6. Blade Replacement

– NOTE –

Be sure that the blade is installed with the lift wing  toward the top.

6. Install the cutter blade onto the the machine. Secure  the blades from rotating and torque to 39 ft/lbs.  See Figure 7-6.

7.12 WHEELS

The rear drive wheels should be removed and any debris  cleaned from the wheel gear area after every 40 hours of  operation or weekly, whichever comes first.

– NOTE –

In extremely dusty conditions it may be necessary  to clean the wheels more frequently than  recommended to prevent wheel damage and  increase gear life.

To prevent damage to the wheel bearings, do not  use high-pressure water to clean the wheels.

1. Remove the rear wheels and clean any debris from  the wheel area.

2. After cleaning the wheels, apply a small amount of  anti-seize lubricant to the gears.

GEAR

Figure 7-7. Rear Wheels

7.13 BODY AND DECK

CAUTION

Do not wash any portion of the equipment while it  is hot. Do not wash the engine; use compressed  air.

1. After each use, wash the mower and cutter deck.  Use cold water and automotive cleaners. Do not use  pressure cleaners.

2. Do not spray cold water on the engine, clutch or  electrical components.

3. Repair damaged metal surfaces using Scag touch up paint available from your Authorized Scag Power  Equipment Dealer. Wax the mower for maximum  paint protection.

ILLUSTRATED PARTS LIST

8.1 SCAG APPROVED ATTACHMENTS AND ACCESSORIES

Attachments and accessories manufactured by companies other than Scag Power Equipment are not approved  for use on this machine.

Scag approved attachments and accessories:

CUTTER DECK

CUTTER DECK

• Available through individual engine manufacturer.

SHEET METAL COMPONENTS

SHEET METAL COMPONENTS

BAG ASSEMBLY

BAG ASSEMBLY

Ref. No. Part No. Description
12
453347
487326
Bag Frame Weldment
Bag, GC

HANDLE BAR COMPONENTS

HANDLE BAR COMPONENTS

REAR DRIVE SYSTEM COMPONENTS

REAR DRIVE SYSTEM COMPONENTS

FUEL SYSTEM (Machines with 7CV Engine)

FUEL SYSTEM (Machines with 7CV Engine)

REPLACEMENT DECALS AND INFORMATION PLATES

REPLACEMENT DECALS AND INFORMATION PLATES

LIMITED WARRANTY – SFC Commercial 21
Any part of the Scag commercial mower manufactured by Scag Power Equipment and found, in the reasonable judgment of Scag, to be
defective in materials or workmanship, will be repaired or replaced by an Authorized Scag Service Dealer without charge for parts and
labor during the periods specified below. This warranty is limited to the original purchaser provided the product was purchased from an
Authorized Scag Power Equipment Dealer and is not transferable. Proof of purchase will be required by the dealer to substantiate any
warranty claims. All warranty work must be performed by an Authorized Scag Service Dealer.
This warranty is limited to the following specified periods from the date of the original retail purchase for defects in materials or
workmanship:
• Wear items including drive belts, grass bag, blades, and wheels are warranted for ninety (90) days.
• Frame and structural components are warranted for one (1) year (parts and labor) for commercial use or three (3) years (parts
and labor) for non-commercial use.
• Cutter deck is warranted for a period of one (1) year (parts and labor) for commercial use or three (3) years (parts and labor) for
non-commercial use The repair or replacement of the cutter deck will be at the option of Scag Power Equipment. We reserve the right
to request components for evaluation. This warranty does not cover any mower that has been subject to misuse, neglect, negligence,
modification or accident, or that has been operated in any way contrary to the operating instructions as specified in the Operator’s
Manual.
• Engines are covered by the engine manufacturer’s warranty period. Refer to the engine owner’s manual supplied with this
product.
• Major drive system components are warranted for one (1) year (parts and labor) for commercial use or three (3) years (parts and
labor) for non-commercial use by Scag Power Equipment. (commercial and non- commercial warranty excludes fittings, hoses, drive
belts). The repair or replacement of the transmission will be at the option of Scag Power Equipment. This warranty does not cover
any mower that has been subject to misuse, neglect, negligence, or accident, or that has been operated in any way contrary to the
operating instructions as specified in the Operator’s Manual.
• Blade clutch has a Limited Warranty for one (1) year (parts and labor) for commercial use or three (3) years (parts and labor) for
non-commercial use.
• Spindle assemblies have a Limited Warranty for one (1) year (parts and labor) for commercial use or three (3) years (parts and
labor) for non-commercial use.
• Any Scag product used for rental purposes is covered by a 90 day warranty.
The Scag mower, including any defective part must be returned to an Authorized Scag Service Dealer within the warranty period. The
expense of delivering the mower to the dealer for warranty work and the expense of returning it to the owner after repair will be paid
for by the owner. Scag’s responsibility is limited to making the required repairs and no claim of breach of warranty shall be cause for
cancellation or rescission of the contract of sale of any Scag mower. “Non- Commercial” use is defined as a single property owner,
where the single property is the residence of the owner of the mower. If the mower is cutting more than the owners single property, it is
deemed commercial use and the “non-commercial” warranty does not apply. Scag Power Equipment reserves the right to deny and / or
void the non-commercial warranty if it believes it to be in commercial use.
This warranty does not cover any mower that has been subject to misuse, neglect, modification, negligence, or accident, or
that has been operated in any way contrary to the operating instructions as specified in the Operator’s Manual. The warranty
does not apply to any damage to the mower that is the result of improper maintenance, or to any mower or parts that have not been
assembled or installed as specified in the Operator’s Manual and Assembly Manual. The warranty does not cover any mower that has
been altered or modified, changing performance or durability. In addition, the warranty does not extend to repairs made necessary by
normal wear, or by the use of parts or accessories which, in the reasonable judgment of Scag, are either incompatible with the Scag
mower or adversely affect its operation, performance or durability.
Scag Power Equipment reserves the right to change or improve the design of any mower without assuming any obligation to
modify any mower previously manufactured. All other implied warranties are limited in duration to the one (1) year for commercial
use, three (3) years for non-commercial use or ninety (90) days for mowers used for rental purpose. Accordingly, any such implied
warranties including merchantability, fitness for a particular purpose, or otherwise, are disclaimed in their entirety after the expiration
of the appropriate one year, three year or ninety day warranty period. Scag’s obligation under this warranty is strictly and exclusively
limited to the repair or replacement of defective parts and Scag does not assume or authorize anyone to assume for them any other
obligation. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
Scag assumes no responsibility for incidental, consequential or other damages including, but not limited to, expense for gasoline,
expense of delivering the mower to an Authorized Scag Service Dealer and expense of returning it to the owner, mechanic’s travel time,
telephone or telegram charges, rental of a like product during the time warranty repairs are being performed, travel, loss or damage to
personal property, loss of revenue, loss of use of the mower, loss of time or inconvenience. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you
specific legal rights, and you may also have other rights which vary from state to state.

© 2023
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.

References

• Scag Power Equipment: Commercial Lawn Mowers and More

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