Grasscool 21 inch Mulching Blade for Troy Bilt Cub Cadet 742p0741-x 742-0741 942-0741A 942-0741-X SC500E SC500Z SC700E CC989 Walk-Behind Push Self-Propelled Mowers

What It Is

This is a 21-inch mulching blade designed to replace the stock blade on Troy-Bilt and Cub Cadet walk-behind mowers, including models SC500E, SC500Z, SC700E, and CC989. It uses a sharp, curved design to recut clippings into fine particles that decompose quickly, eliminating bagging.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: Your mower must have a 21-inch cutting deck. Measure the blade length from tip to tip (mounting hole center to tip) if unsure.
• OEM part numbers: This blade replaces Troy-Bilt/Cub Cadet part numbers 742p0741-x, 742-0741, 942-0741A, and 942-0741-X. Cross-check your owner’s manual or current blade for one of these numbers.
• Mounting pattern: It uses a standard 5-point star center hole with a 1-inch diameter. If your mower has a different spindle (e.g., oval or 7-point), this won’t fit.
• Brand compatibility: Direct fit for Troy-Bilt and Cub Cadet push/self-propelled models listed. Not for zero-turn or riding mowers.

Key Things to Know

• Installation difficulty: Easy. Use a socket wrench or blade removal tool. Torque the bolt to 30–40 ft-lbs. Always disconnect the spark plug first.
• Mulching performance: Works best with a mulching plug installed (if your mower has one). Without it, clipping discharge will be less fine.
• Lift vs. standard: This blade has moderate lift for good grass pickup but is not designed for bagging. If you bag frequently, consider a high-lift blade instead.
• Durability: Heat-treated steel holds an edge well, but hitting rocks or roots can bend or chip it. Inspect after each season.

Should You Buy It

If you own a compatible Troy-Bilt or Cub Cadet 21-inch push mower and want to mulch leaves or grass without bagging, this blade is a solid, well-reviewed upgrade. It’s easy to install, fits OEM specs, and at $23.88 offers good value for the performance. Skip it if you primarily bag or have a different deck size.