Original Mulch Plug Assembly Compatible with MTD Troy-Bilt 42" 46" Mulch Deck Kits

What It Is

This is an OEM-style mulch plug designed to block the side discharge chute on MTD and Troy-Bilt 42-inch and 46-inch cutting decks. It redirects clippings into the deck for finer mulching instead of side-discharging or bagging.

Fitment & Compatibility

Before buying, confirm your deck size (42" or 46") and check your mower’s model number—this plug fits most MTD, Troy-Bilt, and Cub Cadet decks with a 7-inch oval discharge opening. It is not universal; measure the chute opening width and height. OEM part numbers for cross-reference include 490-241-0036, 490-241-0037, and 742-04104. If your deck uses a separate mulch kit (baffle + plug), this plug alone won’t convert it—you need the full kit.

Key Things to Know

• Quality: Injection-molded plastic; holds up well but can warp if exposed to prolonged heat or direct sun. Inspect for cracks on arrival.
• Installation: Tool-free—slides into the discharge chute and locks with a spring-loaded handle. Takes under 2 minutes.
• Gotcha: Older decks may have a worn or missing spring clip that holds the plug in place. Check your deck’s latch mechanism first; if missing, you’ll need a replacement clip (sold separately).
• Performance: Best for dry grass. Wet or tall grass will clog the deck—use side discharge or bagger instead.

Should You Buy It

If you want to convert your side-discharge MTD/Troy-Bilt mower to mulching without buying a full kit, and your deck is 42" or 46", this plug is a cheap, effective upgrade. Skip it if your deck requires a dedicated baffle kit or if you regularly mow wet, heavy grass.