John Deere GY00115 Mulch Cover - 42-in Mower Decks - D100 E100 L100 LA100 S240 X300

What It Is

The John Deere GY00115 Mulch Cover is a stamped steel plate that replaces your mower’s side-discharge chute, converting the deck to a mulching setup. It’s designed for 42-inch Edge, Edge X, and standard fabricated decks on select John Deere lawn tractors and zero-turn mowers.

Fitment & Compatibility

• Deck size: Only fits 42-inch (107 cm) decks – measure your deck width before buying.
• Mower models: D100, D105, D110, D120, D125, D130, D140, D150, D155, D160, D170, E100, E110, E120, E130, E140, E150, E160, E170, L100, L105, L107, L108, L110, L111, L118, L120, L130, LA100, LA105, LA110, LA115, LA120, LA125, LA130, LA135, LA140, LA145, LA150, S240, X300, X304, X310, X320, X324, X330, X340, X350, X360, X370, X380, X390, X394, X534, X584, X590, X720, X724, X728, X734, X738, X739, X749.
• OEM vs aftermarket: This is a genuine John Deere part (OEM number GY00115). Aftermarket knockoffs may fit but often have thinner steel or poor alignment.
• Mounting: Uses the same two bolts as your discharge chute – no drilling or modification needed. Check that your deck has the two threaded holes (typically at the rear of the chute opening).

Key Things to Know

• Quality: Stamped 16-gauge steel with a black powder coat – holds up well against rust and impacts. Heavier than most aftermarket covers.
• Installation: 5-minute job with a 1/2-inch socket or wrench. Remove the discharge chute, bolt on the mulch cover, and torque to 10-12 ft-lbs. No special tools.
• Performance: Works best with a dedicated mulching blade (sold separately). Using standard lift blades will leave clippings visible. Expect finer clippings but slightly less bagging capacity.
• Common gotcha: The cover may interfere with some aftermarket baggers or side-discharge chute deflectors – if you switch between mulching and bagging, keep your original chute.

Should You Buy It

Buy this if you have a 42-inch John Deere deck and want a clean, OEM-quality mulching solution for regular mowing. It’s a perfect fit for residential lawns where you want to return clippings as fertilizer. Avoid if you need to bag or side-discharge frequently – swapping covers every mow gets old.