Mountfield Transmission V-Belt - 1111-9251-01

This is a genuine Mountfield transmission V-belt, part number 1111-9251-01. This high-quality repl...

Best current price£15.54from eBay

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eBayGenuine Mountfield S464PD, SP485 HW V Transmission Belt - 1111-9251-01
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£15.54
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Blueperry agriculture (UK)Stiga Transmission V-Belt 1111925101
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Product Information

Full details

The Mountfield Transmission V-Belt (1111-9251-01) is designed for owners of Mountfield, Stiga, and Alpina self-propelled lawn mowers who need a reliable, genuine replacement part to restore smooth drive performance. This high-quality V-belt provides the necessary tension and grip to keep your mower's transmission functioning correctly, though it is essential to verify your specific model number before installation as drive systems can vary significantly across production years.

All features

Model Part Number1111-9251-01
BrandMountfield

Extended Product Information

FAQs

Is this belt compatible with all Mountfield mowers?

No, it is specific to models that utilize this particular part number, such as the S464PD and SP485 HW V. Always check your manual.

Can I use an aftermarket universal belt instead?

While universal belts exist, genuine parts like the 1111-9251-01 are specifically dimensioned for your mower's transmission to ensure longevity and proper grip.

How often should I replace the transmission belt?

There is no set schedule, but you should inspect it every season for signs of cracking, fraying, or stretching.

Do I need special tools to change the belt?

Generally, you will need basic hand tools like wrenches or sockets to remove the deck cover, but no specialized equipment is required.

Why does my belt keep falling off?

This is often caused by misaligned pulleys, worn-out bearings, or excessive belt slack. Inspect the pulley condition during replacement.

Troubleshooting

Mower is not moving when the drive lever is engaged

Check if the belt has slipped off the pulley or has snapped due to wear.

Drive speed is inconsistent or slipping

Inspect the belt tension. If the belt is loose, adjust the drive cable or check for stretched belt material.

Burning rubber smell during operation

Stop the mower immediately; this indicates the belt is slipping excessively and generating high friction.

Pros and Cons

Pros

  • Genuine OEM part ensures perfect fit and reliability
  • Prevents slippage in the drive transmission system
  • Maintains optimal lawn mower performance and speed
  • Durable construction handles high-torque lawn cutting conditions

Cons

  • Installation requires technical knowledge of lawn mower drive systems
  • Belt tension must be calibrated precisely for correct operation
  • Limited to specific mower models; verify serial numbers before purchase

Setup, Compatibility & Care

Proper installation is critical for the lifespan of the V-belt. Always disconnect the spark plug wire before beginning any maintenance on the mower deck or drive system. Accessing the transmission usually requires removing the belt cover or partially tilting the mower. Ensure that the belt is correctly seated in the grooves of both the engine drive pulley and the transmission input pulley. Do not force the belt over the pulleys with sharp metal tools, as this can damage the internal cords. Periodically check for debris buildup around the pulleys, as trapped grass or twigs can cause the belt to slip or jump its track. Keeping the underside of your deck clean will also prevent moisture and acidic grass clippings from degrading the belt material over time.

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