Maxpower 331528B USA Mulching Blade for some 21 Inch Cut MTD/Cub Cadet/Troy-Bilt Replaces 742-0741, 942-0741, CMXGZAM100067 | For 21" Cut MTD/Cub Cadet/Troy-Bilt Mowers, Replaces 742-0741, 942-0741, CMXGZAM100067

What It Is

This is a 21-inch mulching blade designed for MTD, Cub Cadet, and Troy-Bilt walk-behind mowers with a 21-inch cutting deck. It replaces OEM part numbers 742-0741, 942-0741, and CMXGZAM100067. The blade’s curved, multi-surface design lifts and recuts grass clippings into fine particles that decompose quickly, eliminating the need for bagging.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Only fits mowers with a 21-inch cutting deck. Measure your deck width if unsure.
• Blade length: This blade is 21 inches from tip to tip. Measure your current blade’s length and center hole diameter (typically 1 inch on these models).
• Model/brand: Works with most MTD, Cub Cadet, and Troy-Bilt 21-inch push mowers, including select Yard Machines, Yard Man, and Bolens models. Check your mower’s model number against Maxpower’s online fitment guide or your owner’s manual for 742-0741/942-0741 replacements.
• OEM vs aftermarket: This is a USA-made aftermarket blade, not OEM. It meets or exceeds OEM specs but is not an exact OEM part. If you need a direct OEM replacement, stick with the original Cub Cadet/Troy-Bilt part.

Key Things to Know

• Quality: Made in the USA from heat-treated boron steel. Holds an edge well and resists bending. 4.7 stars from over 10,000 reviews confirms consistent performance.
• Installation difficulty: Easy—requires only a socket or wrench. Always disconnect the spark plug wire first. Torque the blade bolt to 30-40 ft-lbs (check your mower’s manual).
• Gotchas: This is a mulching blade only—not for bagging or side-discharge. If you switch between modes, you’ll need a separate blade. Also, mulching works best on dry grass less than 3 inches tall; wet or tall grass will clump.
• Balance: New blades are balanced from the factory, but after sharpening, have them re-balanced to avoid vibration and spindle wear.

Should You Buy It

If you own a 21-inch MTD/Cub Cadet/Troy-Bilt mower and want a durable, high-performance mulching blade at a fair price, this is a solid choice. It’s especially good for users who consistently mulch and want a USA-made blade that lasts. Avoid it if you need a bagging or side-discharge blade, or if you want OEM-only parts.