8TEN LawnRAZOR Mower Blade Set for MTD Cub Cadet RZT L46 S46 942-04290 942-04244 742-04244 742-04290 (Toothed)

What It Is

This is a set of three toothed (mulching) mower blades designed to replace OEM blades on select MTD, Cub Cadet, and RZT zero-turn lawn tractors. The toothed edge chops grass clippings finer than standard blades, improving mulching performance and leaving less visible clippings on your lawn.

Fitment & Compatibility

Critical checks before buying:

• Deck size: Fits 46-inch cutting decks only. Measure your deck width from spindle center to spindle center—if it’s not 46 inches, this set won’t work.
• OEM part numbers: Replaces Cub Cadet/MTD parts 942-04290, 942-04244, 742-04244, and 742-04290. Confirm your current blade has one of these numbers stamped on it.
• Machine models: Fits Cub Cadet RZT L46, S46, and other MTD-built zero-turns with a 46-inch deck (e.g., some Troy-Bilt, Yard Machines, and Craftsman models). Check your owner’s manual or deck’s model tag.
• Measurements: Each blade is approximately 16.5 inches long, 2.5 inches wide, with a 5-point star center hole and 0.5-inch spindle shaft. Verify your spindle matches these specs.
• Aftermarket note: This is a third-party set, not OEM. It’s generally compatible but may require minor balancing or slight fitment tweaks on older decks.

Key Things to Know

• Quality: Blades are made from hardened steel with a coated finish to resist rust. Users report they hold an edge well for 1-2 seasons of normal use, but they may dull faster than OEM in sandy soil.
• Installation: Straightforward—remove the old blade, clean the spindle, and torque the center bolt to 50-70 ft-lbs. Use a blade removal tool or block the blade with a 2x4 to prevent spinning.
• Gotcha: The toothed design can clog in wet, thick grass. For best mulching, mow when grass is dry and keep blades sharp. If you bag or side-discharge often, a standard (non-toothed) blade may work better.
• Balance: Some users report needing to balance the blades out of the box. Check each blade on a balancer before installing—unbalanced blades cause vibration and spindle wear.

Should You Buy It

If you own a 46-inch Cub Cadet RZT or similar MTD zero-turn and want improved mulching performance without paying OEM prices, this set is a solid value. It’s best for homeowners who mow dry, moderate-length grass and don’t mind occasional balancing. Skip it if you bag frequently or have a non-46-inch deck.