Maxpower

What It Is

The Maxpower 331S blade is a universal replacement mower blade designed to lift and cut grass for standard walk-behind mowers. It fits most 20-22 inch deck mowers from brands like Craftsman, Toro, MTD, and Murray.

Fitment & Compatibility

Before buying, measure your existing blade’s center hole diameter (must be 7/8-inch for this model) and overall length (20-22 inches). Also check the sail shape—the 331S uses a high-lift design, which works best for bagging but may not suit mulching decks. Confirm your mower’s brand and model against Maxpower’s fitment chart (available online). This blade is not compatible with zero-turn, riding, or commercial mowers.

Key Things to Know

• Material: Made from hardened steel with a black powder coating for rust resistance—decent for the price, but not as durable as OEM or premium blades.
• Installation: Easy to swap with a socket wrench; just note the blade orientation (sail edge should face upward toward the deck).
• Common gotchas: The universal design may require minor filing on the center hole if your mower uses a non-standard spindle shape. Also, high-lift blades increase engine load slightly, which can bog down smaller engines on tall grass.
• Balance: Out of the box, some users report needing to balance the blade manually with a balancer tool to avoid vibration.

Should You Buy It

Yes, if you need a cheap, reliable replacement for a standard 20-22 inch walk-behind mower and you’re comfortable with basic DIY installation. Skip it if you have a mulching-only deck, a commercial mower, or prefer a premium OEM blade for longer life and better cut quality.