731-07486 Lawn Mower Side Chute & 987-02516A Hinged Mulching Plug Kit Compatible with Craftsman, MTD, Troy Bilt, Yard Man 21" Deck Chute Lawn Mower/Tractor TB100, TB105, TB110, TB120

What It Is

This kit combines a side discharge chute (731-07486) and a hinged mulching plug (987-02516A) for 21-inch walk-behind mowers and tractors from Craftsman, MTD, Troy-Bilt, and Yard Man. It lets you switch between side-discharge and mulching modes without swapping parts.

Fitment & Compatibility

• Deck size: Only fits 21-inch cutting decks. Measure your deck width to confirm.
• Models: Works with Craftsman TB100, TB105, TB110, TB120, and compatible MTD, Troy-Bilt, and Yard Man models with the same deck design.
• OEM vs aftermarket: This is a direct OEM replacement for the listed brands. Not universal; check your mower’s model number against the OEM part numbers (731-07486 and 987-02516A) before buying.
• Key measurement: The side chute attaches to the deck’s side discharge opening—ensure that opening matches the chute’s mounting tab spacing (typically 2.5–3 inches apart on 21-inch decks).

Key Things to Know

• Easy installation: No tools required for most models—the chute snaps on, and the mulching plug slides into the rear discharge opening and hinges up when not in use.
• Quality: The plastic is durable but can crack if you hit a rock or curb. Handle the hinged plug carefully during removal.
• Common gotcha: The mulching plug may not seal perfectly on older decks with warped or bent openings. Inspect your deck’s rear discharge area for damage before installing.
• Use case: Best for switching between bagging, side-discharge, and mulching on the same mower. Not for mowers with a dedicated mulching deck or those using a different plug design.

Should You Buy It

Buy this if you have a 21-inch Craftsman, MTD, Troy-Bilt, or Yard Man mower (especially TB-series) and want a simple, affordable way to convert between side-discharge and mulching without buying separate parts. Skip it if your deck is damaged or you need a dedicated mulching-only setup.