M124895 Mower Deck Belt for John Deere 42 Inch Deck Parts Compatible with Scotts S1742 S1642 Sabre 1542HS 1542GS 1642HS 1742HS 1742GS Lawn Tractor Drive Belt Replacement 1/2" x 116"

What It Is

This is a replacement drive belt for 42-inch mower decks on select John Deere, Scotts, and Sabre lawn tractors. It transfers power from the engine pulley to the deck spindles, enabling blade rotation.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Fits only 42-inch mowing decks (not 38-inch or 48-inch).
• Model fit: Compatible with Scotts S1642, S1742, and Sabre 1542HS, 1542GS, 1642HS, 1742HS, 1742GS. Also fits John Deere models that use a 42-inch deck with the same belt routing (check your owner’s manual).
• Measurements: Belt is 1/2 inch wide x 116 inches long. Measure your old belt or confirm OEM part numbers like M124895 or equivalent. If your old belt is stretched or damaged, measure the deck pulley path to confirm length.

Ignore “universal fit” claims—measure your deck belt path or cross-reference your model number to avoid returns.

Key Things to Buy

• Quality: Aftermarket belt; good for average residential use, but may wear faster than OEM on heavy-duty or frequent mowing.
• Installation: Moderate difficulty. You’ll need to release deck tension (spring-loaded idler pulley) and route the belt around all pulleys exactly as shown in your deck diagram. Take a photo before removing old belt.
• Common gotchas: Not all 42-inch decks use the same belt—some John Deere models (e.g., L100 series) use a different length. Double-check your deck’s belt routing diagram.
• Lubrication: None needed. Keep pulleys clean and free of debris to extend belt life.

Should You Buy It

This is a solid budget pick if you have a compatible Scotts or Sabre tractor and mow a typical suburban lawn. For heavy commercial use or large acreage, spend more on an OEM belt for longer life. If your John Deere model isn’t listed, verify the belt length and pulley pattern before ordering.