Maxpower 331730B Mulching Blade for 20 Inch Cut Poulan/Husqvarna/Craftsman Replaces 145106, 752233 and PP22055

What It Is

The Maxpower 331730B is a mulching blade designed to replace OEM blades on 20-inch cut walk-behind mowers from Poulan, Husqvarna, and Craftsman. It chops grass clippings into fine particles that decompose quickly, eliminating the need for bagging.

Fitment & Compatibility

Before buying, confirm your mower has a 20-inch cutting deck. This blade replaces OEM part numbers 145106, 752233, and PP22055. It fits most 20-inch Poulan, Husqvarna, and Craftsman models (including certain Bolens and Murray units) with a 1-inch center hole and 3/4-inch diameter arbor. Measure your existing blade—this one is 20 inches long, 2 inches wide, and 0.187 inches thick. Double-check your mower’s model number against Maxpower’s online fitment list; some older Craftsman models use a different arbor size.

Key Things to Buy

• Quality: Made from hardened steel with a coated finish to resist rust. User reviews note it holds an edge well for standard residential use but may dull faster than OEM on rocky or sandy soil.
• Installation: Easy DIY job—remove the old blade, install this one with the lift side facing up toward the deck, and torque the blade bolt to 40–50 ft-lbs. Use a block of wood to stop the blade from spinning.
• Gotcha: This is a mulching blade, not a lift blade. It won’t discharge clippings well if you use a side-discharge chute—only use it with a mulching plug installed. Also, check your deck’s spindle height; some 20-inch decks require a specific blade offset (this one has a 0.25-inch offset).
• Common issue: A few users report the blade is slightly out of balance out of the box—check with a blade balancer before installing to avoid vibration.

Should You Buy It

If you have a 20-inch Poulan, Husqvarna, or Craftsman mower and want a budget-friendly mulching blade for regular lawn care, this is a solid choice. It’s not for heavy-duty commercial use or side-discharge setups, but for homeowners mulching weekly, it’s a reliable replacement at a good price.