Scag Power Equipment STTII-61V-31DFI User Manual (English)

Questions and Answers:

S
sarahmoralesAug 20, 2025
Why is my Scag Power Equipment STTII-61V-31DFI leaving strips of uncut grass?
- A
  Andrew MarshallAug 20, 2025
  If your Scag Power Equipment Lawn Mower leaves strips of uncut grass in the cutting path, several factors could be responsible. The blades might be dull or worn, or they may have been sharpened incorrectly; in this case, you should sharpen the blades. Low engine RPM can also cause this, so ensure the engine is running at full RPM. A slipping belt requires adjusting the belt tension. Grass accumulation under the deck means you should clean the underside of the deck. Operating at a ground speed that's too fast or cutting wet grass can also lead to this issue; slow down or cut when the grass is dry. Finally, bent blades will need to be replaced.
M
Megan GrayAug 22, 2025
What to do if Scag Power Equipment STTII-61V-31DFI Lawn Mower leaves strips between cutting paths?
- F
  farleyjamesAug 22, 2025
  If your Scag Power Equipment Lawn Mower is leaving strips of uncut grass between cutting paths, this may be due to not enough overlapping between rows. Increase the overlap of each pass to resolve this issue.
T
Tara MartinAug 25, 2025
How to fix stringers (occasional blades of uncut grass) on Scag Power Equipment Lawn Mower?
- Y
  yporterAug 25, 2025
  To address stringers (occasional blades of uncut grass) with your Scag Power Equipment Lawn Mower, ensure the engine is running at full RPM. Reduce ground speed to suit the conditions, and only cut when the grass is dry. Sharpen the mower blades and clean any grass accumulation from the underside of the deck. Also, check and adjust the belt tension.
J
jasmine47Aug 27, 2025
How to stop streaking (strips of uncut grass) with Scag Power Equipment STTII-61V-31DFI Lawn Mower?
- A
  Amanda NunezAug 27, 2025
  If your Scag Power Equipment Lawn Mower is leaving strips of uncut grass in the cutting path (streaking), try the following: Sharpen or replace dull blades, ensure correct blade sharpening, and maintain full engine RPM. Adjust belt tension, clean grass from the deck's underside, reduce ground speed, and avoid cutting wet grass. Replace bent blades.
C
christopher98Aug 28, 2025
What to do if Scag Power Equipment STTII-61V-31DFI is scalping?
- M
  Michael GibbsAug 28, 2025
  If your Scag Power Equipment Lawn Mower is scalping, where blades hit the dirt or cut too close to the ground, check and adjust tire pressures. Reduce ground speed, especially on rough terrain, and raise the cutting height. Also, avoid cutting wet grass.
D
Daniel SalinasAug 30, 2025
Why is my Scag Power Equipment STTII-61V-31DFI Lawn Mower leaving an uneven cut on flat ground?
- V
  Vicki MorenoAug 30, 2025
  To correct an uneven cut on flat ground with your Scag Power Equipment Lawn Mower, replace blades if the lift is worn. Ensure the blade is mounted correctly with the cutting edge toward the ground. Clean any grass accumulation from the underside of the deck. Adjust the deck pitch and level. For deck mounting issues or a bent spindle area, consult an authorized SCAG dealer. Also, ensure the blade is sharp.
D
Diane FloresAug 31, 2025
Why does Scag Power Equipment Lawn Mower leave sloping ridge across cutting path?
- B
  blackrubenSep 1, 2025
  To resolve sloping ridges across the cutting path with your Scag Power Equipment Lawn Mower, check and adjust tire pressure to ensure they are equal. If the wheels are uneven, adjust the tire pressure. If the deck is incorrectly mounted, or not level side-to-side, consult an authorized SCAG dealer or check for level and correct.
E
Emily AllenSep 2, 2025
How to prevent strips of uncut grass between cutting paths with Scag Power Equipment STTII-61V-31DFI?
- J
  Jeffrey JonesSep 2, 2025
  To fix streaking (strips of uncut grass between cutting paths) with your Scag Power Equipment Lawn Mower, increase the overlap of each pass.
D
Dennis RodriguezSep 4, 2025
What to do for step cut (ridge in center of cutting path) on Scag Power Equipment STTII-61V-31DFI?
- L
  Lori SextonSep 4, 2025
  To address a step cut (ridge in the center of the cutting path) with your Scag Power Equipment Lawn Mower, adjust the pitch and level if the blades are not mounted evenly. Replace the blade if it is bent. For internal spindle failure or incorrect mounting of the spindle, consult an authorized SCAG dealer.
J
Joel Sanders IISep 6, 2025
Why is my Scag Power Equipment Lawn Mower leaving strips of uncut grass in the cutting path?
- P
  Pamela SampsonSep 6, 2025
  Streaking, or strips of uncut grass in the cutting path, can occur for several reasons. The blades may be dull or worn, or they may have been sharpened incorrectly; in this case, sharpen the blades. The engine RPM might be too low, so ensure the engine is running at full RPM. A slipping belt can also be the cause, so adjust the belt tension. Check for grass accumulation under the deck and clean it if necessary. If you are mowing too fast for the conditions, try slowing down. Cutting wet grass can also cause this issue, so wait until the grass is dry. Bent blades can also cause this problem, so replace them.

Scag Power Equipment STTII-61V-31DFI Specifications

General

Model	STTII-61V-31DFI
Fuel Type	Gasoline
Cutting Width	61 inches
Deck Type	Fabricated
Spindle Material	Cast Iron
Transmission Manufacturer	Hydro-Gear
Engine	31 HP
Drive System	Hydrostatic
Transmission	ZT-4400
Ground Speed Reverse	5 mph
Tires (Front)	13 x 6.5-6
Tires (Rear)	24 x 12-12
Turning Radius	Zero Turn

Summary

SAFETY INFORMATION

OPERATIONAL SAFETY GUIDELINES

Rules for safe mower operation, including slope handling and maintenance.

TESTING SAFETY INTERLOCK SYSTEMS

Procedure to test the mower's safety interlock system for proper function.

SLOPE OPERATION SAFETY

Cautions for operating on slopes, including angle limits and surface conditions.

ADDITIONAL OPERATION SAFETY RULES

Further safety recommendations, including hazard awareness and machine handling.

ROLL-OVER PROTECTION SYSTEM (ROPS)

Information and warnings regarding the Roll-Over Protection System.

SEAT BELT INSPECTION AND SAFETY

Instructions on how to inspect the seat belt and warnings about its use.

SLOPE AND GENERAL OPERATION WARNINGS

Warnings about operating on slopes, reducing speed, and safe loading/unloading.

MAINTENANCE CONSIDERATIONS AND STORAGE

Guidelines for safe maintenance, storage, and handling of hydraulic fluid.

SPECIFICATIONS

ENGINE SPECIFICATIONS

Details engine types, models, displacement, fuel systems, and speeds.

CUTTER DECK SPECIFICATIONS

Details cutter deck type, construction, blade sizes, engagement, and components.

OPERATING INSTRUCTIONS

TIGER EYE INSTRUMENT IDENTIFICATION

Identifies and explains the function of each indicator light on the Tiger Eye system.

CONTROLS IDENTIFICATION

Explains the function and operation of various controls on the mower.

SAFETY INTERLOCK SYSTEM

Explains the mower's safety interlock system and its importance.

TESTING THE SAFETY INTERLOCK SYSTEM

Provides a step-by-step procedure to test the mower's safety interlock system.

STARTING THE ENGINE

Step-by-step guide on how to safely start the mower's engine.

GROUND TRAVEL AND STEERING

Instructions for learning and performing ground travel and steering operations.

ENGAGING THE DECK DRIVE (CUTTER BLADES)

How to engage and disengage the mower deck drive system.

HILLSIDE OPERATION SAFETY

Specific safety precautions for operating the mower on slopes.

REMOVING CLOGGED MATERIAL

Safe procedure for clearing clogged material from the discharge chute.

ADJUSTING CUTTING HEIGHT

Steps to adjust the mower deck cutting height.

ADJUSTING THE STEERING LEVERS

Procedure for adjusting the steering levers for optimal control.

ADJUSTING THE HEIGHT ADJUST PEDAL

TROUBLESHOOTING CUTTING CONDITIONS

ADJUSTMENTS

BRAKE ADJUSTMENT

Procedure for adjusting the mower's parking brake linkage.

TRAVEL ADJUSTMENTS

How to adjust neutral and tracking for proper mower movement.

TRACKING ADJUSTMENT

Procedure to correct mower pulling to one side when moving.

CUTTER DECK LEVEL ADJUSTMENT

Procedure to adjust the cutter deck for side-to-side levelness.

CUTTER DECK PITCH ADJUSTMENT

Procedure to adjust the cutter deck for proper front-to-rear pitch.

CUTTER DECK HEIGHT ADJUSTMENT

Steps to adjust the cutter deck to the desired cutting height.

CUSTOM-CUT BAFFLE ADJUSTMENT

ELECTRIC CLUTCH ADJUSTMENT

Procedure to adjust the air gap of the electric clutch for proper operation.

MAINTENANCE

MAINTENANCE CHART - SERVICE INTERVALS

Recommended service intervals for various maintenance procedures.

LUBRICATION

Chart detailing lubrication points, intervals, lubricant types, and quantities.

HYDRAULIC SYSTEM - OIL LEVEL AND CHANGE

Procedures for checking and changing the hydraulic oil.

ENGINE OIL AND FILTER MAINTENANCE

Procedures for checking and changing engine oil and oil filter.

ENGINE FUEL SYSTEM (GASOLINE & DIESEL)

ENGINE FUEL SYSTEM - FILLING AND FILTER REPLACEMENT

BATTERY CARE AND JUMP STARTING

CUTTER BLADES INSPECTION AND REPLACEMENT

Procedures for inspecting, sharpening, and replacing cutter blades.

CUTTER DECK GEARBOX LUBRICATION

LIMITED WARRANTY - COMMERCIAL EQUIPMENT

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