Lawn Mower 42 Inch Deck Belt 1/2 inch X 117 inches Replacement for Cub Cadet Craftsman Troy-Bilt 754-06134, 954-06134, CMXGZAM501081, 490-501-C081, Z510, Ultima Series ZT1-42 KH

What It Is

This is a 1/2-inch by 117-inch replacement deck belt for 42-inch zero-turn mowers. It drives the blades on Cub Cadet, Craftsman, and Troy-Bilt models, including the Ultima ZT1-42 KH and Z510 series.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size: Must be 42 inches. This belt will not fit 46-inch or 54-inch decks.
2. OEM part numbers: Cross-check your mower’s manual against 754-06134, 954-06134, CMXGZAM501081, or 490-501-C081. These are the direct replacements.
3. Measure your old belt: Lay it flat, measure end-to-end (not around pulleys). It should be exactly 117 inches. If it’s stretched or worn, the new belt will still work—but measure a new one if possible.

Common fit models: Cub Cadet Ultima ZT1-42 KH, ZT1-42, ZT2-42, Z510, and select Craftsman/Troy-Bilt 42-inch zero-turns with the same deck design.

Key Things to Know

• Quality: This is an aftermarket belt, not OEM. It typically matches OEM specs but may wear slightly faster under heavy use (e.g., thick grass, frequent mulching).
• Installation: Moderate difficulty—requires removing the deck or using a tensioner tool. Watch a video for your specific model; routing is critical to avoid premature wear.
• Common gotcha: If your mower has a separate idler pulley for the PTO, this belt only drives the blades—not the drive wheels. Check your deck diagram.
• Measurement note: The 1/2-inch width is standard for most 42-inch decks, but verify your pulley grooves aren’t worn to a deeper V-shape—if so, the belt may slip.

Should You Buy It

If you need a reliable, budget-friendly belt for a 42-inch Cub Cadet, Craftsman, or Troy-Bilt zero-turn and don’t mind a slightly shorter lifespan than OEM, this is a solid pick. It’s best for homeowners with moderate mowing frequency. For commercial or heavy-duty use, consider an OEM or Kevlar-reinforced belt instead.