Scag Power Equipment SFC-21-5CV Operator's Manual
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Scag Power Equipment SFC-21-5CV Operator's Manual

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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.
OPERATOR'S
MANUAL
Models: SFC-21-5CV
SFC-21-7CV
PART NO. 03536
PRINTED 01/23
PRINTED IN USA

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  • Page 1 OPERATOR’S MANUAL Models: 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.
  • Page 2 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-21-5CV with a serial number of W2300001 to W2399999 SFC-21-7CV...

  • Page 3: Table Of Contents

    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 ASSEMBLY INSTRUCTIONS ........................2 1.5 SYMBOLS ..............................3 SECTION 2 - SAFETY INFORMATION ..................4 2.1 INTRODUCTION ............................4 2.2 SIGNAL WORDS ............................4 2.3 BEFORE OPERATION CONSIDERATIONS ....................4...
  • Page 4 Table of Contents SECTION 5 - TROUBLESHOOTING CUTTING CONDITIONS ..........19 SECTION 6 - ADJUSTMENTS ....................22 6.1 SELF-PROPEL DRIVE ADJUSTMENTS ....................22 6.2 THROTTLE CONTROL AND CHOKE ADJUSTMENTS ...............24 6.3 TRANSMISSION DRIVE BELT ........................24 6.4 BLADE CONTROL BAR CABLE ADJUSTMENT .................24 6.5 CUTTER DECK ADJUSTMENTS ......................25 SECTION 7 - MAINTENANCE ....................26 7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS ..........

  • Page 5: Section 1 - General Information

    A D V E R S E LY A F F E C T T H E P E R F O R M A N C E , at the time of approval for printing. Scag Power Equipment DURABILITY OR SAFETY OF THIS PRODUCT.

  • Page 6: Assembly Instructions

    Section 1 1.4 ASSEMBLY INSTRUCTIONS 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. In an open area, remove the grass bag, hardware bag and mower from the packaging.

  • Page 7: Symbols

    Section 1 1.5 SYMBOLS SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke Transmission Parking Brake Spinning Blade 48071S On/Start Spring Tension on Idler Off/Stop Falling Hazard Thrown Object Hazard Fast Slow Continuously Variable - Linear Cutting Element - Basic Symbol Pinch Point Cutting Element - Engage 481039S Hour meter/Elapsed Operating Hours Cutting Element - Disengage...

  • Page 8: Section 2 - Safety Information

    A replacement manual is available from your authorized Scag Service the machine that could result in personal injury if proper precautions Dealer or by contacting Scag Power Equipment, Service Department are not taken. at P.O. Box 152, Mayville, WI 53050 or contact us via the Internet at www.scag.com.

  • Page 9: Testing The Blade Stop System

    Never fuel indoors could be deteriorating or out of adjustment. Contact or inside enclosed trailers. your local Authorized Scag Power Equipment 12. DO NOT start the engine until any spilled fuel has been cleaned Dealer immediately to have the blade stop system up or has evaporated.

  • Page 10: Operation Considerations

    (sprinklers, pipes, tree roots, etc.). Cautiously enter a new area. could be deteriorating or out of adjustment. Contact Be alert for hidden hazards. your local Authorized Scag Power Equipment 10. Disengage power to cutter deck before backing up. Do not Dealer immediately to have the blade stop system mow in reverse unless absolutely necessary and then only after repaired.

  • Page 11: Maintenance Considerations & Storage

    Section 2 11. DO NOT turn sharply. Use care when backing up. 22. Tie the mower down securely using straps, chains, cable, or ropes. Both front and rear straps must be directed down and 12. Disengage power to cutter deck before crossing roads, walks or outward from machine.

  • Page 12: Using A Spark Arrestor

    Section 2 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.

  • Page 13: Safety And Instructional Decals

    Section 2 2.9 SAFETY AND INSTRUCTIONAL DECALS 487489 DANGER DANGER Avoid injury from burns - Shut off engine - Allow to cool several minutes - Remove cap slowly - Do not overfill 485667 484803 2023 SFC21 Safety Decals...

  • Page 14: Section 3 - Specifications

    Section 3 SPECIFICATIONS 3.1 ENGINE General Type ............................Heavy Duty Industrial/Commercial Gasoline Model: Scag Model SFC-21-5CV ............................Kohler Command Pro CV173 Scag Model SFC-21-7CV ............................Kohler Command Pro CV224 Displacement: Kohler Command Pro CV173 ..................................173cc Kohler Command Pro CV224 ..................................224cc Type ..............................4 Cycle Gasoline, Single Cylinder, Vertical Shaft Cylinders ....................................

  • Page 15: Weights And Dimensions

    Section 3 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 ..............................

  • Page 16: Section 4 - Operating Instructions

    Section 4 OPERATING INSTRUCTIONS 1. Recoil Start (Figure 4-1). The recoil start is used to start WARNING the engine. 2. Blade Control Bar (Figure 4-1). Used to engage and disengage the cutter blade drive system. Pulling the control Do not attempt to operate this mower unless you bar will engage the cutter blades.

  • Page 17: Testing The Blade Stop System

    16. Rear Discharge Plug (Figure 4-1). Used to shut off the could be deteriorating or out of adjustment. Contact discharge of grass clippings out of the rear discharge opening. your local Authorized Scag Power Equipment Install when mulching. Dealer immediately to have the blade stop system 17.

  • Page 18: Initial Run-In Procedures

    / choke could be deteriorating or out of adjustment. Contact control lever fully forward past the detent. your local Authorized Scag Power Equipment Dealer immediately to have the blade stop system Slowly pull starter handle until just past compression-STOP! repaired.

  • Page 19: Ground Travel

    Section 4 Gradually return choke control to OFF position after engine To travel forward with the mower, slowly pull upward on the drive control starts and warms up. Allow engine to warm before operating the bar. The further the drive control bar is pulled upward the greater the mower.

  • Page 20: Slope Operation

    Section 4 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. Avoid sudden starts when mowing on slopes. Travel across the slope whenever possible.

  • Page 21: Removing Clogged Material

    Section 4 4.10 REMOVING CLOGGED MATERIAL 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. DANGER Use a slow travel speed for trimming purposes. Operate the engine at full throttle for best cutting.

  • Page 22: Adjusting Cutting Height

    Section 4 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.

  • Page 23: Section 5 - Troubleshooting Cutting Conditions

    Section 5 TROUBLESHOOTING CUTTING CONDITIONS CONDITION CURE CAUSE STRINGERS - OCCASIONAL Low engine RPM Run engine at full RPM BLADES OF UNCUT GRASS 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...
  • Page 24 Section 5 TROUBLESHOOTING CUTTING CONDITIONS (CONT'D) CONDITION CAUSE CURE U N E V E N C U T O N F L AT Lift worn from blade Replace blade GROUND - WAVY HIGH-LOW APPEARANCE, SCALLOPED Blade upside down Mount with cutting edge toward ground CUT, OR ROUGH CONTOUR Deck plugged, grass accumulation Clean underside of deck...
  • Page 25 Section 5 TROUBLESHOOTING CUTTING CONDITIONS (CONT'D) CONDITION CAUSE CURE SCALPING - BLADES HITTING Bent spindle mounting area See your authorized SCAG dealer D I R T O R C U T T I N G V E RY CLOSE TO THE GROUND Ground speed too fast Slow speed to adjust for conditions May need to reduce ground speed, raise cutting...

  • Page 26: Section 6 - Adjustments

    Section 6 ADJUSTMENTS 6.1 SELF-PROPEL DRIVE ADJUSTMENTS An adjustment to the self-propel system should be made whenever a new cable is installed. REMOVE COVER SPEED SELECT CONTROL CABLE ADJUSTMENT Shut the engine off and wait for all moving parts to stop. Disconnect the spark plug wire from the spark plug.
  • Page 27 - 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 Shut the engine off and wait for all moving parts to stop.

  • Page 28: Throttle Control And Choke Adjustments

    See Figure 6-6. Authorized Scag Power Equipment Dealer. Adjust the cable until there is a small amount of slack in the cable between the blade control bar and cable sheathing. See 6.2 THROTTLE CONTROL AND CHOKE...

  • Page 29: Cutter Deck Adjustments

    Section 6 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 Scag Power Equipment Dealer. BAG THE CLIPPINGS MULCHING THE CLIPPINGS To convert and prepare the mower back to bagging the grass clippings:...

  • Page 30: Section 7 - Maintenance

    Section 7 MAINTENANCE 7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS HOURS PROCEDURE COMMENTS BREAK-IN (FIRST 10) Check all hardware for tightness Check the transmission belt See paragraph 7.5 Change engine oil See paragraph 7.2 *Clean mower See paragraph 7.8 Check condition of blade See paragraph 7.6 Check blade stop system See paragraph 4.2...

  • Page 31: Engine Oil

    Section 7 7.2 ENGINE OIL A. CHECKING ENGINE CRANKCASE OIL ENGINE OIL FILL & DIPSTICK 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.
  • Page 32 Section 7 DO NOT over fill. The empty space in the fuel tank allows the fuel to NEVER fuel the machine indoors or in an enclosed trailer. expand. Overfilling the fuel tank may result in fuel leakage, damage to DO NOT start the engine until any spilled fuel has been cleaned the engine and/or damage to the machine's emissions system.

  • Page 33: Engine Air Cleaner

    Section 7 ENGINE AIR ENGINE AIR FILTER LATCH FILTER LATCH FUEL SHUTOFF VALVE ENGINE FUEL FILTER ENGINE AIR FILTER Figure 7-3. Fuel Filter Figure 7-4. Engine Air Filter 7.4 ENGINE AIR CLEANER 7.5 DRIVE BELT A. CLEANING AND/OR REPLACING AIR The transmission drive belt has a fixed idler and should be adjusted after CLEANER ELEMENT the first 2, 4, 8 and 10 hours of operation.

  • Page 34: Cutter Blade

    Section 7 7.6 CUTTER BLADE Angle Blade Back Do Not Cut In A. BLADE INSPECTION Remove the spark plug wire before servicing the blade. Raise the mower deck to the highest position. X Must NOT Exceed 1/3 Blade Width WARNING SGB033_2023 Figure 7-5.

  • Page 35: Wheels

    Section 7 - 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. Remove the rear wheels and clean any debris from the wheel CUTTER BLADE area.

  • Page 36: Section 8 - Illustrated Parts List

    Section 8 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:...
  • Page 37 Section 8 NOTES...

  • Page 38: Cutter Deck

    Section 8 CUTTER DECK...
  • Page 39 Section 8 CUTTER DECK Ref. No. Part No. Description *487348 Engine, 5CV *487393 Engine, 7CV 487344 Plug, Mulch 429163 Pin, Pivot 04011-29 Screw, 1/4-20 x 3/8" 44253 Rod, Support Spring 487414 Spring, Rear Cover 463514 Cover, Rear 487302 Trail Shield 487214 Cutter Blade, 21"...

  • Page 40: Sheet Metal Components

    Section 8 SHEET METAL COMPONENTS 12 22...
  • Page 41 Section 8 SHEET METAL COMPONENTS Ref. No. Part No. Description 463514 Cover, Rear 487414 Spring, Rear Cover 429083 Panel, Access 04017-04 Bolt, Hex Head Serrated Flange 1/4-20 x 1/2" 04019-03 Nut, 5/16-18 Serrated Flange 04138-01 Nut, 1/4-20 Cage 463502 Support Bracket, LH 463503 Support Bracket, RH 429193...

  • Page 42: Bag Assembly

    Section 8 BAG ASSEMBLY...
  • Page 43 Section 8 BAG ASSEMBLY Ref. No. Part No. Description 453347 Bag Frame Weldment 487326 Bag, GC...

  • Page 44: Handle Bar Components

    Section 8 HANDLE BAR COMPONENTS...
  • Page 45 Section 8 HANDLE BAR COMPONENTS Ref. No. Part No. Description 453387 Top Bail Weldment 04009-12 Bolt, Shoulder 5/16 x .375 HD 04021-02 Nut, 1/4-20 Center Lock 429122 Clamp, Cable 04117-03 Nut, 1/4-20 Flange Elastic Stop 453388 Bottom Bail Weldment 04003-51 Bolt, Carriage 1/4-20 x 2"...

  • Page 46: Rear Drive System Components

    Section 8 REAR DRIVE SYSTEM COMPONENTS 15 16...
  • Page 47 Section 8 REAR DRIVE SYSTEM COMPONENTS Ref. No. Part No. Description 483453-31 Bearing 487070 Wheel Assembly, Rear 04117-02 Nut, 3/8-16 Flange Elastic Stop 04117-03 Nut, 1/4-20 Flange Elastic Stop 486923 Cover, Wheel Gearing 04050-20 Retaining Ring, 1/2" Ext. HD 486719 Gear, Pinion 486765 Bearing (x2)

  • Page 48: Fuel System (Excludes Ca Models)

    Section 8 FUEL SYSTEM (Machines with 7CV Engine) To Engine...
  • Page 49 Section 8 FUEL SYSTEM (Machines with 7CV Engine) Ref. No. Part No. Description 463366 Fuel Tank Assembly w/Decal (incl. #2, #3, #4, #5) 486939 Valve 486940 Grommet, Valve 482571 Bushing, .56 Viton 483748 Elbow w/ Screen, 90 Degree 486967 Cap, Fuel Tank 48059-01 Clamp, Fuel Hose 1/4"...

  • Page 50: Replacement Decals And Information Plates

    Section 8 REPLACEMENT DECALS AND INFORMATION PLATES DANGER DANGER Avoid injury from burns - Shut off engine - Allow to cool several minutes - Remove cap slowly - Do not overfill...
  • Page 51 Section 8 REPLACEMENT DECALS AND INFORMATION PLATES Ref. No. Part No. Description 487489 Decal, Warning - SFC21 484803 Decal, Danger - Cut Finger 485403 Decal, Metalcraft - USA 485667 Decal, Fuel Tank 487402 Decal, SFC-21 487416 Decal, Cut Height - Front 487406 Decal, 21 Commercial Grade 487417...

  • Page 52: Section 9 - Limited Warranty - Sfc Commercial

    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.
  • Page 53 © 2023 Scag Power Equipment Division of Metalcraft of Mayville, Inc.

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