631-05195A Mulch Plug Replacement Compatible with MTD Cub Cadet 42" & 46" Mulch Plug 631-05195 Lawn Tractors 19B30005 19A70041 19A30046100 - Fits 2012 and After 631-05195 Mulch Plug

What It Is

This is a replacement mulch plug (part #631-05195A) that blocks the side discharge chute on select MTD and Cub Cadet lawn tractors, forcing grass clippings to recirculate under the deck for finer mulching. Designed for 42-inch and 46-inch cutting decks, it’s used when you want a clean, nutrient-returning cut without bagging.

Fitment & Compatibility

• Check your deck size: Fits only 42" and 46" decks on MTD/Cub Cadet tractors—not 48", 50", or 54" decks. Measure deck width if unsure.
• Model numbers: Confirmed fit for OEM part #631-05195 and compatible with models 19B30005, 19A70041, and 19A30046100. For other tractors, verify your mower’s model number on the frame or under the seat.
• Year range: Works on machines built 2012 and after. Older decks may have different chute geometry.
• Physical check: Plug dimensions are roughly 8" x 6" x 3" with a curved lip. Compare to your existing plug or chute opening—if it doesn’t match the shape or latch design, it won’t seal properly.

Key Things to Know

• Installation is tool-free: Snap it into the discharge chute opening—no bolts or screws. Ensure the spring-loaded tabs click fully into place to avoid vibration loosening.
• Quality note: This is an aftermarket replacement. Some users report a looser fit or thinner plastic than OEM. Inspect the latch tabs for cracks before each use.
• Don’t use with bagger: Remove the bagger and chute deflector before installing the plug. Running both can clog the deck and strain the engine.
• Check for debris: Grass buildup under the plug reduces mulching efficiency. Clean the underside after each mow.

Should You Buy It

If you already own a compatible MTD/Cub Cadet tractor from 2012 or later and want to switch from bagging to mulching without buying a full kit, this is a budget-friendly fix. It’s simple to install and works well for occasional use, but if the fit feels loose or plastic quality concerns you, consider spending more on an OEM part for a tighter seal and longer life.