Fourtry 21" High-Lift Mower Blade for Husqvarna & Poulan 0.97" Center Hole, Pre-Sharpened Steel

Fourtry's 586859604 is a 21-inch high-lift replacement mower blade engineered to restore cutting performance for compatible Husqvarna, Poulan and similar 21" deck lawn mowers.

If your mower is leaving clumps, producing uneven cuts, or the blade is worn or bent, this heavy-duty steel high-lift blade is a straightforward replacement. It fits a wide range of Husqvarna and Poulan models and replaces part numbers 586859604, 586859602, and 501082501. The blade ships sharpened, pre-painted for safe handling, and matches 21" deck geometry with a 0.97" center hole and a 5-point star hub pattern requirement.

Which mower models and part numbers does this blade replace?

This Fourtry high-lift blade was made to work with many walk-behind and riding mower decks. It is compatible with several Husqvarna and Poulan machines and covers multiple OEM part numbers so you can replace a worn blade without hunting for an exact original.

• Replaces part numbers: 586859604, 586859602, 501082501.
• Compatible Husqvarna models: L221A, L221AHK, L221AK, L321AH, L321AHE, L321AHX, L421P, LC121FH, LC221A, LC221AH, LC221FH, LC221FHE, LC221R, LC221RH.
• Compatible Poulan models: P160RWD and Poulan Pro PR675AWD.
• Also matches RedMax CWP21 and RWRH21 applications.

How does the high-lift design affect mowing performance?

High-lift blades create stronger airflow under the deck, lifting grass upright before cutting and improving bagging and discharge. That produces cleaner, more even cuts and helps move clippings into the bag or side discharge channel more efficiently.

• Stronger vacuuming action for better bag fill and reduced clumping.
• Cleaner edge-to-edge cutting on 21" decks when installed correctly.
• Helps maintain a consistent grass lift for improved appearance.

What are the blade’s construction and dimensions?

The blade is stamped from durable steel and finished with a protective paint that eases handling during installation. It arrives pre-sharpened so you can reinstall and get back to mowing quickly, while the coating is designed to wear off in normal use.

• Overall length: 21"; width: 2-1/4"; thickness: 4/25".
• Center hole diameter: 0.97" (fits hubs requiring this size).
• Sold individually — one high-lift blade per package.

How do I install this blade safely and ensure proper fit?

Installation is a routine maintenance task but requires basic mechanical safety: disconnect the spark plug, secure the mower, and use the correct wrench for your spindle nut. Confirm your deck uses a 5-point star spindle hub pattern and the 0.97" center hole to guarantee compatibility before buying.

• Disconnect spark plug and wear gloves to avoid contact with the sharp edge.
• Verify spindle hub shape: 5-point star pattern required for correct fit.
• Torque the mounting bolt to your mower manufacturer’s specification after installation.

Who is this for? This Fourtry 586859604 21" high-lift blade is for homeowners and lawn-care pros who own compatible Husqvarna, Poulan, RedMax or similar 21" deck mowers and need a durable replacement blade that restores bagging and cutting performance. Choose this blade if you want a pre-sharpened steel replacement with known OEM cross-reference numbers and clear fitment details. Always check your spindle hub pattern and center hole size before purchasing to ensure a correct match.