42 Inch Mower Mulching Blades Replacement for Troy Bilt Cub Cadet Pony Bronco Mustang XT1 XT2 LT42 LTX1040 RZT-L42, 42'' Lawn Mower Replace 942-0616 742-0616 942-04126 942-04308-X

What It Is

This is a set of three 42-inch mulching blades designed to replace OEM blades on Troy-Bilt and Cub Cadet lawn tractors with a 42-inch cutting deck. They are intended for mulching grass clippings into fine particles that decompose quickly, eliminating the need for bagging.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Your mower must have a 42-inch cutting deck—measure if unsure.
• Model compatibility: Fits Troy-Bilt Pony, Bronco, Mustang; Cub Cadet XT1, XT2, LT42, LTX1040, RZT-L42. Also fits MTD, Yard Machines, and Craftsman models with same deck.
• OEM part numbers: Replaces Cub Cadet/Troy-Bilt 942-0616, 742-0616, 942-04126, 942-04308-X. Check your current blade’s stamped number.
• Measurements: Each blade is ~20.5 inches long, 2.5 inches wide, with a 5-point star center hole (1-inch diameter). Confirm your blade’s hole shape and size—round or star—before ordering.

Key Things to Know

• Quality: Made from heat-treated carbon steel with a coated finish to resist rust. Thickness is ~0.1875 inches—adequate for residential use, but not as heavy-duty as OEM or high-end aftermarket.
• Installation: Straightforward if you have a socket wrench and blade removal tool (or a block of wood to lock the blade). Torque bolts to 40–50 ft-lbs. Use thread-locker if your mower vibrates excessively.
• Gotchas:
  • These are mulching blades only—they won’t side-discharge or bag well. If you need versatility, buy a set of standard lift blades.
  • The star center hole may not fit older models with a round hole—verify before purchase.
  • Some users report slight imbalance out of the box; balance them on a balancer or mark and file the heavy side.
• Price vs. OEM: At ~$26 for a set of three, these cost roughly half of OEM blades. Good value if you don’t need premium steel or perfect balance.

Should You Buy It

Buy these if you have a 42-inch Troy-Bilt or Cub Cadet tractor used for mulching on a standard residential lawn (1–3 acres) and want an affordable drop-in replacement. Skip them if you need bagging or side-discharge performance, or if your deck is smaller/larger than 42 inches.