987-02516A Hinged Mulching Plug Assembly & 731-07486 Side Discharge Chute Compatible with MTD, Craftsman, Troy Bilt, Yard Man 21" Chute Lawn Mower/Tractor

What It Is

This is a two-piece accessory set that lets you switch your 21-inch MTD/Craftsman/Troy-Bilt mower deck between mulching and side-discharge modes. The hinged plug (987-02516A) blocks the deck chute for mulching, and the chute (731-07486) deflects clippings to the side when you remove the plug.

Fitment & Compatibility

Before buying, confirm your mower has a 21-inch stamped steel deck with a rectangular side-discharge opening (about 4" × 6"). This fits most MTD-built models: Craftsman (917 series), Troy-Bilt, Yard Man, and Huskee with 21" deck. It does NOT fit 20", 22", or larger decks. Check your deck’s model number (stamped near the discharge opening)—common compatible decks include 21A-xxx and 21B-xxx series. The hinged plug replaces OEM part 987-02516A; the chute replaces 731-07486. If your mower already has a separate mulching plug, this will likely swap in. Not compatible with zero-turn or walk-behind mowers with different chute shapes.

Key Things to Know

• Quality: Both pieces are sturdy OEM-style plastic. The plug’s hinge is a weak point if you force it—use gentle pressure when installing/removing.
• Installation: Takes under 5 minutes. No tools needed—the plug snaps into the deck opening, and the chute clips onto the deck’s tab. The hinge lets you flip the plug open without fully removing it for quick mode changes.
• Common gotcha: The plug may not seal perfectly on older decks with bent or warped openings. Check for gaps that could leak clippings. Also, the chute’s clip can break if you step on the mower deck—store it separately.
• Use case: Best for residential mowing on flat to moderate terrain. Not for heavy-duty commercial use—the plastic will crack under frequent abuse.

Should You Buy It

If you have a 21-inch MTD/Craftsman/Troy-Bilt push mower and want an affordable, tool-free way to switch between mulching and side-discharge, this is a solid buy. It’s a direct-fit upgrade for mowers missing these parts or with broken originals. Skip it if your deck is damaged or you need heavy-duty metal parts.