GX22151 Gator Blade for 42'' Deck, Compatible with J OHN Deere 102, 105, 115, 125, 135, D100, D105, D110, D120, E100, E110, E120, LA100, LA105, LA110, Replaces GY20850, AM141033, 2 Pack

What It Is

The GX22151 Gator Blade is an aftermarket mulching blade set (2-pack) designed for 42-inch cutting decks on select John Deere lawn tractors. It replaces OEM blades GY20850 and AM141033, and is intended for homeowners looking to improve grass clipping mulching and bagging performance.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: Must be a 42-inch deck (measure deck housing width; some JD models may vary).
• Model list: Fits John Deere 102, 105, 115, 125, 135, D100, D105, D110, D120, E100, E110, E120, LA100, LA105, LA110. Not compatible with X300 series or other decks.
• OEM numbers: Directly replaces GY20850 and AM141033. If your current blade has a different OEM part number (e.g., GY20570), measure length and center hole before swapping.
• Physical specs: Each blade is approximately 21 inches long, 2.5 inches wide, with a 1-inch center hole and 7-point star pattern. Confirm your spindle uses a star-shaped mounting hole.

Key Things to Know

• Quality: These are stamped steel, not hardened. They dull faster than OEM or high-carbon blades but are fine for average residential use.
• Installation: Straightforward—remove the blade bolt (left-hand thread on most JD models), swap blades, and torque to 30-40 ft-lbs. No special tools needed.
• Common gotcha: The “Gator” design has raised wings that can catch thick wet grass; avoid using in heavy, damp conditions to prevent bogging the engine.
• Balance: Each blade is pre-balanced, but check with a blade balancer after sharpening to avoid vibration.

Should You Buy It

Buy if you want an affordable, drop-in replacement for your 42-inch John Deere lawn tractor and primarily cut dry, light-to-medium grass. Skip if you have a larger deck, need commercial-grade durability, or often mow wet/overgrown lawns—you’ll get better results with a thicker OEM or high-lift blade.