Mulch Cover GY00115 Fits John Deere 42" Decks 100 Series D100 D110 E120 E130 Z23

What It Is

The GY00115 mulch cover replaces the standard side-discharge chute on John Deere 42-inch cutting decks, allowing grass clippings to recirculate and be finely cut for natural lawn fertilization. It’s designed for select 100 Series tractors and Z23 zero-turn models.

Fitment & Compatibility

Before buying, confirm your deck is exactly 42 inches (measured blade tip to tip, not housing width). This cover fits John Deere models D100, D110, D120, D130, E120, E130, and Z23 with 42-inch decks. It is an aftermarket part—not OEM—so check that your deck’s chute mounting bracket uses two bolts (typically 5/16-inch) spaced 3.5 inches apart. If your deck has a different pattern or a quick-attach system, this won’t fit. Also verify your mower doesn’t already include a mulch plug from the factory.

Key Things to Know

• Material quality: Users report thin plastic that may crack after a few seasons, especially if stored in direct sunlight. Consider applying UV protectant.
• Installation: Simple bolt-on—remove the side-discharge chute, align the cover, and tighten two bolts. No tools beyond a socket or wrench needed.
• Performance: Works well for light-to-moderate grass; thick, wet clippings may clump. For best results, mow frequently and avoid cutting more than 1/3 of grass height.
• Gotcha: The cover may rattle if bolts aren’t snug, and it can interfere with bagger attachments—remove it if switching to bagging.

Should You Buy It

If you want to mulch without buying an OEM part and don’t mind replacing it every couple of years, this $33 cover is a budget-friendly option. It’s best for casual homeowners with a 42-inch John Deere who mow weekly and prefer leaving clippings on the lawn. For heavy-duty or commercial use, spend more on a thicker OEM mulching plug.