631-05195 Lawn Mower Mulch Plug Compatible with MTD 42" & 46" Lawn Tractor Fits 2012 and After 631-05195 Mulch Plug 19B30005, 19A70041, 19A30046100 631-05195A Mulch Plug

What It Is

This is a replacement mulch plug for MTD 42-inch and 46-inch lawn tractors (2012 and newer). It blocks the side discharge chute to force grass clippings back under the deck for finer mulching.

Fitment & Compatibility

• Deck size: Fits 42" and 46" stamped steel decks on MTD, Troy-Bilt, Cub Cadet, and Yard Machines tractors.
• OEM cross: Replaces MTD 631-05195, 631-05195A, 19B30005, 19A70041, 19A30046100.
• Check before buying: Measure your deck’s discharge opening width (roughly 4.5"–5" for most 42"/46" decks). Verify your deck has a single-bolt mounting hole near the chute. This plug will not fit 50" or 54" decks or older pre-2012 models.
• Aftermarket note: This is a non-OEM part; fitment is identical to OEM but material may be slightly lighter.

Key Things to Know

• Installation: Simple—remove the discharge chute cover, slide the plug into the chute opening, and secure with the existing bolt. Takes under 5 minutes.
• Quality: Users report a snug fit with no rattling. The plastic is durable but can crack if over-tightened—hand-tighten only.
• Gotcha: If your deck has a spring-loaded chute door, you may need to remove it or zip-tie it open for the plug to seat fully.
• Performance: Works best with sharp blades; dull blades will leave clumps even with the plug.

Should You Buy It

Buy this if you have a 42" or 46" MTD-family tractor from 2012 or later and want to convert to mulching without buying a full kit. It’s cheap, easy to install, and works well for regular grass cutting. Skip it if you have a different deck size or an older model—measure first.