MaxPower 561724B 3 Blade Set for 50" Cut Craftsman, Husqvarna, Poulan Replaces OEM no. 137380, Black

What It Is

This is a set of three 20-inch replacement blades designed for 50-inch cutting deck lawn tractors. It’s a direct aftermarket match for OEM part number 137380, commonly used on Craftsman, Husqvarna, and Poulan models.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Your mower must have a 50-inch cutting deck. This set includes three blades, each 20 inches long.
• OEM cross-reference: It replaces OEM part 137380, plus AYP/MTD numbers 137380MA, 131460, and 131460MA. Check your owner’s manual or current blade part number.
• Brand/model: Fits many Craftsman, Husqvarna, Poulan, and AYP/MTD tractors from the 2000s onward. Not compatible with zero-turn or stand-on mowers unless they use a 50-inch three-blade setup with the same spindle pattern.
• Center hole & offset: The center hole is 5/8-inch diameter, and blades have a standard 0.25-inch offset. Measure your existing blades to verify.

Key Things to Know

• Quality vs OEM: These are hardened steel, but not as thick as factory Husqvarna or Craftsman blades. They’re fine for average residential cutting but may dull faster on rocky or sandy soil.
• Installation: Straightforward bolt-on replacement. Use a torque wrench (40-50 ft-lbs) and apply anti-seize to prevent rust. Note the blade orientation—cutting edge faces the direction of rotation.
• Balance: Out of the box, these blades are usually balanced, but always check with a blade balancer before installing. An unbalanced blade vibrates and wears spindle bearings.
• Common gotcha: The blades are 20 inches, but some 50-inch decks use a 20.5-inch center blade. Measure all three existing blades before ordering.

Should You Buy It

If you have a 50-inch Craftsman, Husqvarna, or Poulan tractor and need a budget-friendly, direct-fit blade set for regular residential mowing, this is a solid choice. Avoid it if you mow heavy commercial properties or need thicker, longer-lasting blades—spend more on OEM or high-end aftermarket.