John De ere 22 Inch Mower Blade GX23522 - Mulching Blade for JM/JS Series Walk-Behind Mowers | Replaces Ore gon 91-612, Ste ns 340-123

What It Is

This is a mulching blade designed for John Deere JM/JS series walk-behind mowers with a 22-inch cutting deck. It recirculates grass clippings for finer cutting, which helps return nutrients to the lawn.

Fitment & Compatibility

Check these before buying:

• Deck size: Fits only 22-inch John Deere walk-behind mowers (JM/JS series). Measure your deck width to confirm.
• Model fit: Works with JM100, JM105, JS20, JS25, JS30, JS35, JS40, JS45, JS50, JS55, JS60, and JS65. Verify your model number on the mower’s data tag.
• OEM vs aftermarket: This is an OEM John Deere blade (part GX23522), so it matches factory specs. It replaces Oregon 91-612 and Stens 340-123 aftermarket parts, but those may have slight differences in thickness or balance.
• Measurements: Blade length is 22 inches, center hole diameter is 7/8 inch, and it uses a 5-point star drive. Confirm your mower’s blade mount matches.

Key Things to Know

• Mulching vs. standard: Mulching blades have a curved design that lifts grass for finer clipping. They work best with a mulching plug installed and dry grass—wet grass clogs easily.
• Installation difficulty: Easy—you need a socket wrench and a block of wood to hold the blade. Torque the bolt to 30-40 ft-lbs. Use thread locker if the bolt loosens over time.
• Common gotchas: The star drive pattern can wear out if the blade is loose. Check for cracks or bends before each season. Sharpening is possible but replace after 25 hours of use or when dull.
• Balance: Always balance after sharpening or replacing. An unbalanced blade causes vibration and damages the spindle.

Should You Buy It

Buy this if you own a compatible John Deere JM/JS 22-inch mower and want OEM quality for mulching. It’s reliable for fine clippings and easy to install, but skip it if you bag or side-discharge—standard blades work better for those tasks.