RUTU 987-02516A Hinged Mulch Plug, Compatible with MTD, Troy-Bilt, Suitable for 21" Push Walk Behind Lawn Mowers - Replacement 987-02516 687-0251 687-02516 687-02516A

What It Is

The RUTU 987-02516A is a hinged mulch plug that blocks the grass discharge chute on 21-inch push walk-behind mowers, forcing clippings to recirculate under the deck for finer mulching. It’s designed for MTD and Troy-Bilt models that use the OEM part numbers listed.

Fitment & Compatibility

Check your deck size first: this plug fits 21-inch decks only. It’s a direct replacement for OEM part numbers 987-02516, 687-0251, 687-02516, and 687-02516A.
Brands: MTD, Troy-Bilt, and many Craftsman, Yard Machines, or Bolens models built on MTD platforms with the same deck design.
What to verify:

• Measure your deck width (21” is a standard push mower size).
• Confirm your chute opening has the two hinge pin holes on the sides.
• Look for the original plug part number on your old part (often stamped on the plastic).
• The plug is aftermarket (RUTU brand), so it may be slightly lighter plastic than OEM, but dimensions match.

Key Things to Know

• Installation is tool-free: lift the chute door, slide the plug into the opening, and snap the hinge pins into the side holes. No screws or hardware needed.
• Hinge design: the “hinged” feature lets the plug flip up when you install a bagger or side-discharge chute—no need to fully remove it.
• Quality note: some users report the hinge pins can be stiff initially or break if you force them; apply gentle pressure and check alignment before pushing.
• Common gotcha: if your mower has a different chute shape (e.g., curved or smaller opening), this plug won’t seal properly—measure your chute width (typically 4-5 inches).

Should You Buy It

If you have a 21-inch MTD or Troy-Bilt push mower and want an affordable, easy-install mulch plug that lets you switch between bagging and mulching without removing it, this is a solid pick. Avoid if you need a heavy-duty OEM part for commercial use or if your deck opening is non-standard.