Grasscool 942-0616A 6 Star Mulching Blades for Cub Cadet 42 inch Mower Ultima ZT1-42 XT1-42 LT42 Troy Bilt Bronco Pony 42" Zero Turn Riding Replace 742-0616A

What It Is

The Grasscool 942-0616A is a set of six-star mulching blades designed for 42-inch cutting decks on Cub Cadet and Troy-Bilt riding mowers. These blades replace OEM part 742-0616A and are intended for mulching grass clippings into fine particles that decompose quickly, reducing the need for bagging.

Fitment & Compatibility

Before buying, confirm your mower has a true 42-inch deck (measure blade tip to tip). These blades fit specific models: Cub Cadet Ultima ZT1-42, XT1-42, LT42, and Troy-Bilt Bronco and Pony 42-inch zero-turn or riding mowers. They are a direct replacement for OEM part 742-0616A. Check your current blade’s center hole size (should be a standard star pattern) and overall length—these are 21 inches long with a 1-inch center hole. Verify your deck’s blade mounting pattern (three-point star) matches. Not compatible with 46-inch or 54-inch decks.

Key Things to Know

• Quality: Made from heat-treated steel for durability, but not hardened like OEM blades—may dull faster on tough grass or debris.
• Installation: Easy to swap; requires a socket wrench and blade removal tool. Torque bolts to 50-60 ft-lbs. Use thread locker to prevent loosening.
• Gotcha: These are mulching blades, not lifting blades—they produce a finer cut but won’t discharge clippings well. For bagging, stick with OEM or high-lift blades.
• Balance: Check blade balance after mounting; unbalanced blades cause vibration and uneven cuts. Most sets are pre-balanced, but verify.

Should You Buy It

If you own a compatible 42-inch Cub Cadet or Troy-Bilt mower and prioritize mulching over bagging, this is a solid budget-friendly upgrade. However, if you mow thick, wet grass or want longer blade life, consider spending more on OEM or hardened aftermarket blades. Works best for routine mulching on well-maintained lawns.