CUB CADET 42" Deck Mulch Plug Kit LTX1040 LTX1042 RZT-S42 Mowers 19A30006

What It Is

The Cub Cadet 42" Deck Mulch Plug Kit (part #19A30006) is an OEM accessory that blocks the discharge chute and side opening on select 42-inch Cub Cadet mower decks, forcing grass clippings to recirculate for finer mulching. It’s designed for use with a dedicated mulching blade (sold separately) to improve lawn nutrient recycling.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch stamped deck – this kit fits models including LTX1040, LTX1042, RZT-S42, and several others in the LT, RZT, and Z-Force series. Check the product listing or your owner’s manual for the full compatibility list. Measure your deck’s side discharge opening width (roughly 7 inches) to ensure the plug seats properly. This is an OEM Cub Cadet part, so it’s a direct fit; no modifications needed. Avoid generic aftermarket plugs, as they may not seal correctly.

Key Things to Know

• Installation is straightforward – slides into the discharge opening and locks with a single pin or knob (no tools required). Takes under 5 minutes.
• Mulching performance depends on blade choice – the plug alone won’t give fine mulching. Pair with a dedicated mulching blade (e.g., Cub Cadet 942-05751) for best results.
• Quality is adequate but not premium – some users report the plastic plug can warp or loosen over time, especially in hot weather or if left on during storage. Check fitment annually.
• Common gotcha – the plug may interfere with side-discharge chute attachment if you switch between modes. Keep the original chute parts handy.

Should You Buy It

This kit is a good buy if you have a compatible Cub Cadet 42-inch deck and want to switch to mulching without buying a full conversion kit. It’s cheap, easy to install, and OEM-specific. Skip it if you need heavy-duty mulching or plan to use it on a non-Cub deck – aftermarket options are more universal but less reliable.