Cluparis 561811B Lawn Mower Blades for John Deere 42" Cut Deck - GX22151 Medium Lift Blade Compatible with John Deere 102 115 125 135 D100 AM137328 GX21694 GY20850 50-3231 Husqvarna 578431911

What It Is

This is a set of three 42-inch medium lift blades (part #561811B) designed for John Deere and Husqvarna lawn tractors with a 42-inch cutting deck. They replace OEM parts like AM137328, GX22151, and Husqvarna 578431911, suited for regular residential mowing on flat to slightly hilly terrain.

Fitment & Compatibility

Before buying, confirm your deck measures exactly 42 inches from blade tip to blade tip. This set fits John Deere 100 series (102, 115, 125, 135) and D100, plus Husqvarna models using part 578431911. Check your current blade’s center hole diameter (should be 1-inch) and overall length (around 21 inches). Not compatible with 48-inch or 54-inch decks. Cross-reference your model number with the listed OEMs: AM137328, GX21694, GY20850, or 50-3231.

Key Things to Know

• Medium lift – good for mulching and bagging in dry grass, but not ideal for wet or thick growth.
• Installation – straightforward bolt-on replacement; torque bolts to 70-90 ft-lbs. Use a blade locking tool or wedge to prevent spinning.
• Balance – after installing, spin-check for wobble. Unbalanced blades cause vibration and uneven cuts.
• Material – made from hardened steel; sharpens well but may dull faster than OEM premium blades in sandy soil.

Should You Buy It

Buy this if you need a reliable, budget-friendly replacement for a 42-inch John Deere or Husqvarna deck and mow mostly dry, clean lawns. Skip it if you require a high-lift blade for wet grass or a heavy-duty option for rocky terrain.