631-05195A Mulch Plug Replacement for 631-05195, Compatible with MTD 42" / 46" Lawn Mowers 19A30046100, 19A30047100, 19A30055100, 19A70041, 19B30005, Fits 2012 and After

What It Is

The 631-05195A is a replacement mulch plug designed to block the side-discharge chute on compatible MTD 42” and 46” lawn mowers, converting them to mulching mode so clippings are recut and left on the lawn as fertilizer.

Fitment & Compatibility

• Deck size: Fits 42” and 46” cutting decks only.
• Model numbers: Directly replaces OEM 631-05195. Compatible with MTD models 19A30046100, 19A30047100, 19A30055100, 19A70041, and 19B30005.
• Year range: Designed for mowers manufactured 2012 and after.
• What to measure: Check the chute opening width and the two tab slots on your deck. The plug is about 10” wide with two alignment tabs; measure your existing plug or chute opening to confirm.
• OEM vs aftermarket: This is a non-OEM replacement. It may fit slightly looser or require minor trimming on some decks. If you have a pre-2012 mower, measure first; it may not lock in securely.

Key Things to Know

• Installation difficulty: Easy — no tools required. Slide into chute opening until tabs snap into slots. Remove to side-discharge.
• Quality notes: At 4.0 stars, most users find it works well. A few report the plastic feels thinner than OEM or tabs are slightly off, requiring gentle filing.
• Common gotcha: If your deck has debris buildup in the chute slots, clean them before installing. The plug may pop out during use if not fully seated.
• Not universal: Will not fit 38”, 50”, or 54” decks, or non-MTD brands like Cub Cadet or Troy-Bilt with different chute designs.

Should You Buy It

Buy this if you have a 2012-or-later MTD 42” or 46” mower and need a budget-friendly mulch plug that installs in seconds. Skip it if you want OEM fit and finish, or if your deck is pre-2012 — measure first to avoid a loose fit.