Grasscool GY20850 7-star mounting pattern for secure JD 42-inch deck fit.
Grasscool GY20850 compatible with John Deere 42-inch deck for reliable mulching.
Grasscool GY20850 toothed mulching blade for efficient cut and clippings.
Grasscool GY20850 blade length 21-3/8 inches for 42-inch decks.
Grasscool GY20850 blade width 2-1/2 inches for durable performance.
Grasscool GY20850 5 mm blade thickness for lasting strength.
Grasscool GY20850 1-inch air lift design aids clearance.
Grasscool GY20850 protective paint coating prevents rust during handling.
Grasscool GY20850 easy installation note for quick setup.

Grasscool

Grasscool GY20850 Mulching Blades for John Deere 42-Inch Deck – 7-Star Mounting Pattern, Replaces GX22151 (D100–D130)

High-performance patio lawn and garden made for confident daily results

$40.44

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Why customers choose Cera Garden

Grasscool GY20850 Mulching Blades for John Deere 42-Inch Deck

Upgrade your mowing setup with Grasscool GY20850 mulching blades, designed for John Deere 42-inch decks. Built around a precise 7‑star mounting pattern, these blades aim to deliver a secure fit and focused cutting action that helps manage clippings with less fuss while keeping your mower efficient and ready for the next pass.

Compatibility and mounting

  • 7-star mounting pattern enables reliable alignment with John Deere 42-inch deck riding mowers across multiple model lines.
  • Replaces GX22151 and fits a broad range of JD decks, including D100–D130, LA100–LA135, and 102, 105, 115, 125, 135, S100, X125, S120, E100, E110, E120, E130, E140.
  • Clear guidance is provided to help you identify the correct blade pattern before ordering to minimize guesswork.

Specifications at a glance

  • Blade type: toothed mulching blade
  • Center hole shape: 7-point star
  • Deck size: 42 inches
  • Blade length: 21-3/8 inches (543 mm)
  • Width: 2-1/2 inches (63.5 mm)
  • Thickness: 13/64 inch (5 mm)
  • Air lift: 1 inch (25 mm)

Real-world use and benefits

These blades are designed to support mulching performance within the John Deere 42-inch deck ecosystem. Expect a robust edge profile that can help process clippings efficiently and contribute to a tidy lawn finish. The toothed design and specific dimensions align with the deck size and mounting pattern to provide a practical upgrade path for compatible machines.

Installation notes

  • You do not need to remove the paint on the blade before use—the coating protects your hands during installation and may wear off after a short period of movement.
  • Designed for straightforward mounting with the 7-star pattern, potentially reducing downtime during blade swaps.

FAQ

Q: Will Grasscool GY20850 blades fit my John Deere 42-inch deck?

A: They use a 7-star mounting pattern and fit many JD 42-inch lawn tractors including D100–D130 and LA-series.

Q: What are the blade specifications at a glance?

A: Blade length 21-3/8 inches, width 2-1/2 inches, thickness 5 mm; air lift 1 inch; 7-point star center hole.

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