Karbay 532406581 Lawn Tractor 46-in Deck Mulch Cover Assembly Compatible with Craftsman Husqvarna AYP 46" Stamped Deck Mower, Replace 405454, 406581

What It Is

This is a stamped steel mulch cover assembly for 46-inch lawn tractor decks. It replaces the factory side-discharge chute with a fixed cover that recirculates clippings for finer mulching, designed for Craftsman, Husqvarna, and AYP models with 46" stamped decks.

Fitment & Compatibility

• Deck size: Only for 46-inch stamped steel decks – not for fabricated/fab decks or 42"/48"/54" decks.
• OEM cross-references: Replaces Craftsman/Husqvarna/AYP part numbers 405454 and 406581.
• Mounting: Uses two bolts on the deck’s side discharge opening. Check that your deck has the standard stamped mounting holes (two holes ~5.5" apart, 1/4" diameter).
• Model check: Compatible with most Craftsman LT1000/1500/2000, Husqvarna YTH/YTA, and AYP 46" deck tractors from the early 2000s onward. Verify your deck’s stamped steel construction (look for “46” pressed into the deck top).

Key Things to Know

• Build quality: Stamped steel is durable but can rust if paint chips. The Karbay version is an aftermarket part – thickness and paint adherence are slightly less than OEM, but functional.
• Installation: Easy – remove two bolts from the side-discharge chute, attach the cover, and reinstall bolts. No drilling or modifications needed if your deck is compatible.
• Common gotcha: If your deck has a separate mulch plug (some models use a plastic insert), this cover replaces the entire chute assembly – not just the plug. Ensure you have the chute mounting bracket still attached to the deck.
• Performance: Works best with a dedicated mulching blade (sold separately). Standard high-lift blades won’t recirculate clippings as effectively.

Should You Buy It

If you have a 46" stamped deck Craftsman/Husqvarna/AYP tractor and want to switch from side-discharge to mulching without buying an OEM part, this is a solid budget option. It’s easy to install and gets the job done for about half the OEM price. Not for decks with a different mounting pattern or fabricated decks – measure first.