CUB CADET 19B30005100 Mulch Kit 46" RZT LTX LX 1045 1046 SX XT1 XT2 ZT1 Ultima

What It Is

This is a genuine OEM mulch kit for 46-inch Cub Cadet zero-turn and lawn tractor decks. It replaces the side-discharge chute with a set of baffles and a mulch plug that recirculates clippings inside the deck for fine, even mulching.

Fitment & Compatibility

• Deck size: Only fits 46-inch fabricated or stamped decks. Measure your deck width (blade tip to blade tip) to confirm.
• Models: RZT, LTX, LX 1045/1046, SX, XT1, XT2, ZT1, and Ultima series with a 46" deck. Check your model number and deck code (e.g., 46A, 46FA) on the mower’s serial tag.
• OEM vs aftermarket: This is a genuine Cub Cadet part (19B30005100). Aftermarket kits exist but may require drilling or trimming; this one bolts directly to existing deck holes.
• Measurements: Kit includes two side baffles, a rear plug, and hardware. No deck modifications needed if your deck already has the mounting slots.

Key Things to Know

• Installation difficulty: Moderate – about 30-45 minutes. You’ll need a socket set and jack stands to lift the front of the mower for access.
• Common gotcha: The rear mulch plug must seal tightly against the deck opening. If your deck has a bent or warped lip, the plug may rattle or let clippings escape.
• Blade requirement: For best results, use a dedicated mulching blade (sold separately). Standard high-lift blades will throw clippings up and cause clumping.
• Performance note: Works well in dry grass under 6 inches. Wet or tall grass will still leave piles – you’ll need to mow more frequently.

Should You Buy It

If you own a 46-inch Cub Cadet and want a clean, OEM-fit solution for mulching without side-discharge cleanup, this kit is worth the premium over aftermarket options. It’s not for rough decks or users who only mow wet/tall grass – those are better off with a bagger or standard side discharge.