Rotary 22" 6424 Push Mower Mulching Lawnmower Blade MTD/Cub Cadet 742-0742

What It Is

The Rotary 22" 6424 is a mulching lawnmower blade designed to replace the OEM MTD/Cub Cadet part 742-0742. It fits 22-inch deck push mowers and is built to chop clippings finely for nutrient recycling, ideal for users who prefer not to bag or side-discharge.

Fitment & Compatibility

Before buying, check three things:

• Deck size: Only fits 22-inch cutting decks. Measure your blade length (tip to tip) to confirm.
• Model/brand: Compatible with MTD, Cub Cadet, Yard Machines, Yard Man, Troy-Bilt, and Bolens push mowers that use the 742-0742 OEM blade. Common models include Cub Cadet SC 300, SC 500, and MTD 11A series. Verify your mower’s model number against the OEM part number.
• Measurements: Blade is 22" long, 0.187" thick, with a 0.75" center hole and a 2.5" diameter sail. If your existing blade matches these specs, it will fit. This is a straight (non-angled) mulching blade—not for side-discharge or bagging setups.

Key Things to Buy

• Quality: Made from steel, but not hardened like OEM. May dull faster in sandy or rocky lawns. Check for balance out of the box; some users report needing to rebalance.
• Installation: Easy—remove the old blade (use a block of wood to prevent spin), install new one with the sail facing up toward the deck, and torque the bolt to 30-40 ft-lbs. No special tools beyond a socket wrench.
• Gotchas: The blade is slightly lighter than OEM, which can cause vibration if not perfectly balanced. Always test spin by hand before starting. Do not use on decks with a curved spindle mount—this is a flat blade only.
• Safety: Disconnect spark plug and drain fuel before swapping. Wear gloves—blade edges are sharp.

Should You Buy It

Buy this blade if you have a 22-inch MTD/Cub Cadet push mower and want an affordable mulching replacement that works well for regular grass cutting in clean lawns. Skip it if you need a heavy-duty blade for thick, wet grass or rocky terrain—the OEM or a hardened aftermarket option will last longer. For the price, it’s a solid value for basic mulching.