MaxPower 561811XB 2 Blade Commercial Mulching Set for Many 42 in. John Deere Mowers Replaces OEM # GX22151, GY20850

What It Is

This is a complete commercial mulching blade set (two blades) for 42-inch John Deere mower decks. It replaces OEM parts GX22151 and GY20850, designed for dense, frequent mulching on residential or light commercial properties.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Fits only 42-inch John Deere decks. Measure your deck width if unsure.
• Model compatibility: Works with select 100, 200, 300, X300, X500, and Z-series models (e.g., L100, D110, X310, Z425). Cross-check your model against MaxPower’s online list or your owner’s manual.
• OEM replacement: These are direct aftermarket replacements for OEM # GX22151 and GY20850. They are not universal—do not assume fit on other brands or non-listed John Deere models.

Key measurement: Blade length is 21 inches, center hole is 1 inch diameter, with a 7-point star drive. Verify your spindle’s drive pattern matches.

Key Things to Know

• Quality: High-carbon steel with heat-treated edge. Hold up well against roots and rocks, but not as thick as premium OEM blades—bend easier under heavy impact.
• Installation: Easy bolt-on job. Use a torque wrench to 45-55 ft-lbs. Never reuse old bolts; included hardware is fine.
• Mulching performance: Aggressive lift and curved wing design for fine clippings. Works best with dry grass—wet grass will clump.
• Balance: Check blade balance after installation to avoid vibration. Out-of-box balance is usually good, but minor adjustments may be needed.

Should You Buy It

Yes, if you own a compatible 42-inch John Deere and want reliable, budget-friendly mulching blades that match OEM performance. Skip it if you need heavy-duty bagging or side-discharge blades—these are mulching-only. For occasional residential use, this set is a solid value.