631-05195A 631-05195 Mulch Plug, Compatible with MTD 42" & 46" Lawn Tractor, for Cub Cadet 631-05195A Fits Models 63105195A 93105195 19B30005100 19A70041 19A70041 19A70041100

What It Is

This is a mulch plug (part #631-05195A) that replaces the side-discharge chute on select MTD and Cub Cadet lawn tractors with 42-inch or 46-inch cutting decks. It blocks grass clippings from exiting the deck so blades can recirculate and finely chop them for mulching.

Fitment & Compatibility

• Deck size: Fits 42-inch and 46-inch decks only—measure your deck width before ordering.
• Brands: Compatible with MTD, Cub Cadet, Troy-Bilt, and Yard Machines tractors that use OEM part #631-05195A or #931-05195.
• Cross-reference models: Works with 19B30005100, 19A70041, 19A70041100, and similar. Check your owner’s manual or existing plug for the stamped part number.
• OEM vs aftermarket: This is an OEM Cub Cadet part, so fitment is exact—no trimming or mods needed. Aftermarket plugs may be cheaper but often require adjustment.
• Measurement: The plug opening is roughly 6.5 x 4 inches; verify your deck’s discharge chute matches that shape.

Key Things to Know

• Installation is tool-free: just slide it into the discharge opening and secure with the existing latch or knob (if your tractor has one). If not, you may need a separate retaining kit.
• Blades matter: For proper mulching, use dedicated mulching blades (often sold separately) or ensure your standard blades are sharp and have a high-lift profile.
• Durability: Made of heavy-duty plastic; it can crack if you hit a large rock or stump, but it holds up well for normal grass cutting.
• Common gotcha: Some 42-inch decks have a slightly different latch design—double-check that your deck has the two tabs or a spring-loaded latch to hold the plug in place.

Should You Buy It

If you own an MTD or Cub Cadet tractor with a 42” or 46” deck and want to mulch without buying a full conversion kit, this plug is a direct, hassle-free upgrade. It’s best for homeowners who already have mulching blades and want to switch between discharge and mulching quickly. Skip it if your deck doesn’t have the right latch or if you need a complete mulching system (blades + plug).