RZT Mower 42-inch Deck Belt 1/2" x 117"Replacement for Ref No A115, Simplicity 1719911SM, Snapper 1719911SM, MTD 754-06134 754P06134 954-0197

What It Is

This is a 42-inch deck drive belt (1/2" wide, 117" long) for zero-turn mowers, specifically designed to transfer power from the engine pulley to the cutting deck spindles on Simplicity, Snapper, and MTD RZT models.

Fitment & Compatibility

Before buying, confirm these three things:

1. Deck size: This belt only fits 42-inch decks. Measure your deck width—if it’s 46" or 48", this belt won’t work.
2. Belt dimensions: It’s 1/2" wide and 117" long. Measure your old belt (lay it flat, measure end to end) to verify. A 117" belt is common on many RZT 42" decks, but some use 116" or 118".
3. Replacement part numbers: This belt cross-references with A115, Simplicity 1719911SM, Snapper 1719911SM, and MTD 754-06134 / 754P06134 / 954-0197. Check your owner’s manual or the old belt’s part number against this list. Not all 42" Snapper or Simplicity belts are the same—older models may use a different length or width.

Key Things to Know

• Quality: This is an aftermarket belt, not OEM. Reviews indicate it’s durable for typical residential use but may wear faster under heavy commercial mowing or debris-heavy conditions.
• Installation difficulty: Moderate. You’ll need to remove the deck or at least the belt guard and mule pulley. A belt routing diagram is essential—check your manual or look for a sticker under the deck.
• Common gotcha: The belt can be tight to install. Do not force it with a screwdriver—you may damage the belt or pulleys. Use a belt installation tool or release deck tension first.
• Check pulley condition: Worn or rough pulleys will eat this belt quickly. Spin each spindle pulley by hand—if it wobbles or feels gritty, replace the pulley before installing the new belt.

Should You Buy It

If you have a 42-inch deck on a Simplicity, Snapper, or MTD RZT mower and your old belt matches the 1/2" x 117" spec, this is a solid budget-friendly replacement for light-to-medium residential mowing. It’s not for heavy commercial use or older models with unusual deck configurations—stick with OEM if you need maximum longevity.