731-07131 Side Discharge Chute with 987-02516A Hinged Mulch Plug Compatible with MTD Lawn Mower 987-02516A 98702516A 98702516 731-7131 731-07131 with Pin and Spring

What It Is

This is a two-piece accessory set: a side discharge chute that directs grass clippings out the right side of the deck, and a hinged mulch plug that blocks the discharge opening so clippings recirculate for finer mulching. Designed for select MTD (and sub-brand) walk-behind mowers with a 21-inch or 22-inch stamped steel deck.

Fitment & Compatibility

Check these before buying:

• Deck size: Fits 21-inch and 22-inch MTD decks—measure your deck width and the discharge opening (approx. 8.5 x 3.5 inches).
• Mounting system: Uses a pin and spring (included) that hooks into a bracket on the deck. Verify your deck has the two small holes or a tab for the spring/pin setup—not a bolt-on flange.
• OEM cross-references: MTD 731-07131, 987-02516A, 987-02516. Also fits some Cub Cadet, Troy-Bilt, Yard Machines, and Craftsman models with the same deck design.
• Aftermarket note: This is a non-OEM replacement. If your original chute uses a different latch or has a wider opening, it won’t work.

Key Things to Know

• Quality: Users report the plastic is slightly thinner than OEM but holds up fine for seasonal residential use. The hinge on the mulch plug is functional but not heavy-duty.
• Installation: Takes 2–3 minutes. Slide the chute into the deck slot, align the pin holes, insert the pin, and hook the spring. No tools needed.
• Common gotcha: The spring can pop off if the pin isn’t fully seated. Make sure the pin clicks into both holes on the chute.
• Mulch plug operation: The hinged design lets you switch between side discharge and mulching without removing the plug—just flip it open or closed. It won’t seal 100% if the deck is warped.

Should You Buy It

Buy this if you have a 21-22 inch MTD-style mower with the pin-and-spring mounting, you want an affordable replacement for a lost or broken chute, and you need the convenience of switching between discharge and mulching without swapping parts. Skip it if you need a heavy-duty commercial part or a perfect OE fit.