2 Pack 490-110-C203 Mulching Blades for 46 Inch Deck, Replaces 742P05510-X, 742-05510-X, Mower Blades Compatible with Cub Cadet/Troy-Bilt/Craftsman Lawn Tractors and Zero-Turn Mowers

What It Is

This is a 2-pack of mulching blades designed for 46-inch cutting decks on select Cub Cadet, Troy-Bilt, and Craftsman lawn tractors and zero-turn mowers. Mulching blades have a curved, high-lift design that cuts grass clippings into fine particles to be re-deposited into the lawn as natural fertilizer.

Fitment & Compatibility

• Deck size: Only for 46-inch decks. Measure your deck width before buying.
• OEM replacement numbers: 490-110-C203, 742P05510-X, 742-05510-X. Cross-reference with your mower’s OEM part number.
• Brands confirmed: Cub Cadet, Troy-Bilt, Craftsman. Not universal—check your model number against the seller’s fitment list.
• Physical measurements: Each blade is approximately 20.5 inches long, with a 1-inch center hole and a 0.5-inch offset. Measure your old blade’s length, center hole diameter, and offset to confirm.
• Blade type: Mulching only. Not for bagging or side-discharge unless your deck accepts mulching blades for all modes.

Key Things to Know

• Installation difficulty: Moderate. Requires a socket wrench and blade removal tool (or block of wood to prevent rotation). Always disconnect the spark plug and drain fuel first.
• Sharpening: These are factory-sharpened but will dull with use. You can sharpen them 2-3 times before replacement is needed.
• Balance: After sharpening, check blade balance with a simple balancer to prevent vibration and deck damage.
• Common gotcha: Mulching blades work best with a mulching kit (often sold separately) that blocks the discharge chute. Without it, you may get poor cut quality or clumping.

Should You Buy It

If you have a 46-inch deck on a Cub Cadet, Troy-Bilt, or Craftsman tractor or zero-turn and want fine clippings for lawn nutrition, this is a solid, budget-friendly 2-pack. It’s a direct replacement for the OEM part at a lower price point, but verify your model number and blade measurements first—and expect to install a mulching kit if your mower doesn’t already have one.