Mulch Cover FITS 46" Craftsman 406581, 532406581 (Includes Hardware)

What It Is

This is a mulch cover (also called a mulch plug) designed to block the discharge chute on 46-inch Craftsman lawn tractors, forcing grass clippings to recirculate under the deck for finer mulching instead of bagging or side-discharging. It includes the necessary mounting hardware.

Fitment & Compatibility

Before buying, verify your deck is exactly 46 inches wide and that your tractor uses OEM part number 532406581 (or 406581). This cover fits many Craftsman and Husqvarna models with a 46-inch stamped steel deck from the mid-2000s to 2010s, but not fabricated or fabricated-style decks. Check your owner’s manual or existing part number—if your deck has a separate discharge deflector and a chute opening, this should work. Measure the chute opening width (roughly 6–7 inches) to confirm. Aftermarket copies may have slightly thinner steel or looser fit; this is OEM-style.

Key Things to Know

• Installation is easy – Usually a 10-minute job with a socket wrench. Remove the existing discharge deflector, bolt on the cover using included hardware.
• Quality is mid-range – Some users report the paint chips quickly, but the steel itself holds up. The seal may not be 100% airtight, so a few clippings might escape.
• Mulching performance varies – Works best with sharp blades and dry grass. Damp or tall grass can clog the deck; you may need to slow your mowing speed.
• Check for missing hardware – A few buyers noted the included bolts/nuts were incomplete or stripped. Have spare 5/16-inch hardware on hand just in case.

Should You Buy It

If you own a 46-inch Craftsman or compatible Husqvarna tractor and want to switch from bagging to mulching without buying a whole new deck, this is a budget-friendly, simple fix. It’s not premium—expect some paint wear and occasional clogging in heavy grass—but it does the job for the price. Avoid if you need a perfect seal or plan to use it commercially.