Mulch Cover Fits D100 D105 D110 D120 D125 D130 42" Mower Deck,Replacement for John Deere OEM

What It Is

A mulch cover replaces the discharge chute or bagger adapter on a 42-inch mower deck, blocking grass clippings from exiting so the blades recut them into fine mulch. Designed for select John Deere D-series lawn tractors.

Fitment & Compatibility

• Deck size: Fits only 42-inch (UC4C) mower decks. Measure your deck width to confirm.
• Models: John Deere D100, D105, D110, D120, D125, D130. Does not fit X-series, S-series, or older 100-series tractors.
• OEM reference: Replaces John Deere part number GY20826. Check your deck’s belt routing—some aftermarket covers may require the original hardware (bolts, clips) to attach.
• Measurement: The cover opening must match the deck’s discharge chute width (~7–8 inches). Verify your deck has two mounting holes spaced roughly 5.5 inches apart.

Key Things to Know

• Low rating (3.1/5): Only 2 reviews—likely early production issues or thin plastic. Expect a snug fit, but some users report needing to trim edges for proper alignment.
• Installation difficulty: Easy (10–15 minutes). Remove the discharge chute or bagger adapter, align the cover over the opening, and secure with existing bolts. No special tools required.
• Common gotcha: The cover may not seal tightly against the deck, leaving a gap that lets clippings escape. Apply weather stripping or foam tape along the rim if needed.
• Mulching performance: Works best with sharp, mulching blades (not included). Standard lift blades will produce coarser clippings.

Should You Buy It

If you own a D-series 42-inch deck and want an affordable alternative to the OEM John Deere mulch cover (often $70+), this can work—but manage expectations. It’s a basic plastic part with potential fit issues. For a guaranteed seal and easier install, spend more on the genuine John Deere GY20826.