Replacement 631-05195A 631-05195 Mulch Plug Compatible with MTD 42" / 46" Deck Lawn Mowers, Mulching Plug Kit Compatible with Cub Cad et XT1 42" Deck 19A30046100, 19A30047100, 19A30055100, 19A70041

What It Is

This is a replacement mulching plug (part numbers 631-05195A / 631-05195) designed to block the discharge chute on MTD 42-inch and 46-inch deck lawn tractors, forcing clippings to recirculate for fine mulching. It fits Cub Cadet XT1 and XT2 series tractors with 42-inch stamped decks.

Fitment & Compatibility

Before buying, verify two things: (1) your deck is exactly 42" or 46" (measure from outside blade tip to tip), and (2) your deck has a side-discharge opening with two horizontal slots for the plug’s tabs. This plug fits MTD-built models including Cub Cadet XT1 42" (19A30046100, 19A30047100, 19A30055100, 19A70041), Troy-Bilt, Yard Machines, and Craftsman with 42" or 46" stamped decks. It does not fit fabricated/fab decks or 50" decks. OEM equivalents are MTD 490-110-M152 and 731-06938. The plug is aftermarket, not OEM, so expect slight cosmetic differences but identical mounting.

Key Things to Know

• Installation is tool-free: Slide the plug’s tabs into the deck slots, then secure with the included hairpin clip or existing latch. Takes under 2 minutes.
• Requires a mulching blade kit: This plug only blocks the discharge; you still need mulching blades (sold separately) for proper cutting. Without them, clippings will clump.
• Check deck clearance: Some 46" decks with deep baffles may need a 1/4" spacer behind the plug to prevent the blade from hitting. Test by hand-rotating the blade after install.
• Durability: Users report the plastic tabs can crack if overtightened or if the plug is forced onto a dirty deck. Clean the mounting slots first.

Should You Buy It

Buy this if you own an MTD 42" or 46" stamped-deck tractor and want to convert from side-discharge to mulching without paying OEM prices. It works reliably when paired with sharp mulching blades, but skip it if you have a fabricated deck, a 50" cut, or want a complete kit with blades included.