Mulch Cover GY00115 Fits for 42" Decks John Deere LA100 L100 Series Tractor

What It Is

This mulch cover (GY00115) blocks the side discharge chute on 42-inch John Deere tractor decks, forcing grass clippings to recirculate for finer mulching. Designed for LA100 and L100 series mowers, it replaces the discharge deflector when you want to leave clippings on the lawn instead of bagging or side-discharging.

Fitment & Compatibility

Before buying, confirm your deck is exactly 42 inches (measured blade tip to blade tip). This cover fits John Deere LA100, LA110, LA115, LA120, LA130, LA135, LA140, LA145, LA150, L100, L107, L108, L110, L111, L118, L120, L130, and L145 models with 42-inch Edge or standard stamped decks. It does NOT fit 38-inch or 48-inch decks. Check that your deck has the two existing mounting holes near the chute opening—the cover bolts directly to these. OEM part number GY00115 is the reference; this is an aftermarket replacement, so verify hole spacing matches (approximately 4 inches center-to-center).

Key Things to Know

• Material quality: Made from heavy-duty plastic, but some users report flexing or cracking if overtightened. Hand-tighten bolts only.
• Installation: Tool-free with a wrench—remove two bolts from the existing chute deflector, swap the cover, and reinstall. Takes under 5 minutes.
• Common gotcha: The cover may not seal perfectly if your deck is bent or has debris buildup. Clean the chute area thoroughly before mounting.
• Performance: Works best with sharp blades and dry grass. Wet or tall grass will clump and require more cleanup underneath.

Should You Buy It

If you own a 42-inch LA100/L100 series Deere and want a simple, low-cost way to mulch without buying a full mulch kit, this is a solid choice. It’s not as refined as OEM but does the job for casual homeowners. Skip it if you need a perfect seal or mow heavy, wet grass regularly—you’re better off with a dedicated mulch plug kit.