8TEN LawnRAZOR Mower Blade Set for AYP Husqvarna 561739 403107 405380 532405380 46 inch Deck (Notched High Lift)

What It Is

This is a set of three notched high-lift blades designed for 46-inch cutting decks on select AYP and Husqvarna lawn tractors. The high-lift profile increases airflow under the deck for superior grass clipping discharge and bagging performance, making it ideal for thick or damp grass.

Fitment & Compatibility

Before buying, confirm your mower has a 46-inch deck and uses three blades. This set replaces OEM numbers 561739, 403107, 405380, and 532405380, commonly found on Husqvarna, Poulan, Craftsman, and other AYP-built tractors. Measure your existing blade length (should be ~20.5 inches), center hole diameter (typically 7/8-inch or 1-inch), and ensure the notched design matches your spindle. Check your deck’s blade pattern (offset vs. straight) by looking at your old blades—this set is for notched spindles only. Not compatible with zero-turn mowers or decks under 46 inches.

Key Things to Know

• Quality: Made from heat-treated boron steel for durability, but sharpening may be needed after heavy use.
• Installation: Moderate difficulty—requires a socket wrench, torque wrench (set to 70-90 ft-lbs), and blade removal tool. Always disconnect the spark plug first.
• Gotcha: High-lift blades increase engine load and can reduce fuel efficiency; not ideal for dry, dusty conditions as they may kick up debris.
• Balance: Blades come pre-balanced, but verify with a blade balancer after mounting to avoid vibration.

Should You Buy It

This is a solid choice if you prioritize bagging or side discharge in thick grass and have a compatible 46-inch AYP/Husqvarna tractor. Skip it if you mostly mulch or have a smaller deck—look for low-lift or mulching blades instead.