Husqvarna 587199603 Lawn Mower 22-in Deck Mulching Blade Genuine Original Equipment Manufacturer (OEM) Part

What It Is

This is a genuine OEM mulching blade for Husqvarna 22-inch cutting decks, designed to chop grass clippings into fine particles that settle into the lawn as natural fertilizer. It’s intended for residential mowers with a 22-in deck, not for commercial zero-turn or tractor decks.

Fitment & Compatibility

• Deck Size: Only fits 22-inch cutting decks. Do not use on 21-inch or 46-inch decks.
• Brand Fit: Works with Husqvarna, Poulan Pro, and some Jonsered models that share the same spindle pattern. Check your owner’s manual or existing blade for the part number.
• OEM vs Aftermarket: This is genuine Husqvarna, so it matches factory specs exactly. Aftermarket blades may have different hole patterns or thickness—verify compatibility before substituting.
• Measurements: Blade length is 22 inches, center hole diameter is 1 inch, and the mounting pattern uses a 5-point star (or 5-pointed) hole. Measure your existing blade’s length and hole shape to confirm.

Key Things to Know

• Quality: Made from hardened steel with a coated edge for longer life. Expect 25–50 hours of mowing before needing replacement, depending on debris and sharpness.
• Installation Difficulty: Easy for DIYers—requires a socket wrench (usually 13/16” or 5/8” for the blade bolt) and a block of wood to lock the blade. Torque the bolt to 40–50 ft-lbs (check your manual).
• Common Gotchas: Mulching blades need sharp grass and dry conditions to work well. Wet grass clogs the deck and reduces mulching performance. Also, never sharpen a mulching blade—replace it when dull, as the curved shape is hard to re-profile.
• Safety: Always disconnect the spark plug before removing the blade. The bolt may be reverse-threaded on some models (check manual).

Should You Buy It

If you own a Husqvarna or compatible 22-inch mower and want a factory-perfect mulching blade that delivers fine clippings and reduces bagging frequency, this is a solid, reliable choice. It’s not for non-Husqvarna decks or for those who prefer to sharpen blades instead of replacing them.