Research-based review · Updated October 11, 2026. We have not tested this product. Specifications and fit checks below are based on the linked sources; our recommendation reflects those limits.
Disclosure: As an Amazon Associate, I earn from qualifying purchases.
Quick verdict: The Maxpower 331981B is a universal-style mulching blade marketed for gas-powered mowers. It is not a recommended replacement for a battery or corded electric mower. Electric owners should start with the electric mower replacement-parts guide and their mower’s specified blade number.
What the 331981B listing actually tells you
Maxpower’s product description on Lowe’s identifies a 21-inch blade with a round, 1-inch center hole and an included washer kit. It explicitly excludes electric and battery-powered mowers. Treat that restriction as a buying boundary, even if a washer appears to fit the mounting bolt.
Why “universal” is not enough
A nominal 21-inch cutting width is only a starting point. The attachment shape, blade profile, hardware and deck clearance also matter. The washer kit is not evidence that this blade is approved for every mower with a similar deck size. Do not drill, grind or improvise hardware to make a blade fit.
The previous article promised proven performance and broad compatibility without supplying evidence. We have no independent cut-quality, runtime or durability measurements for this blade, so those claims have been removed.
Who should consider it?
It is worth comparing only if you own a gas mower and can confirm this exact replacement with the mower manufacturer or a qualified dealer. Compare the total delivered cost with the mower’s original blade, and check the seller’s fitment and return terms before buying. A cheaper part has little value if it cannot be safely installed.
Check Maxpower 331981B price on Amazon →
Better starting points for electric mower owners
Use the EGO AB2100 fit guide or RYOBI AC04020 fit guide only if your model appears in the relevant fit information. Neither is a universal substitute. Our maintenance and storage checklist explains when to inspect a blade and when to stop using a mower with damage or vibration.
Does “Gold” mean the blade is made of gold?
No. Do not interpret a product-line name or finish as a claim about precious-metal construction. More importantly, the finish tells you nothing about whether the blade fits your mower.
