Mower Deck Belt for 46" AYP/Poulan/Husqvarna/Craftsman 405143, Replaces 405143/532405143/ 21546607/584453101

What It Is

This is a replacement mower deck belt for 46-inch cutting decks on select AYP, Poulan, Husqvarna, and Craftsman lawn tractors. It drives the blades from the engine pulley, essential for cutting grass.

Fitment & Compatibility

• Deck size: 46 inches (measured blade tip to blade tip).
• OEM part numbers: 405143, 532405143, 21546607, 584453101. Cross-check your old belt’s number.
• Brand fit: AYP, Poulan, Husqvarna, Craftsman (many models from the 1990s–2010s with 46” stamped decks).
• Measure before buying: Belt length should be approximately 105.5 inches (1/2” width). Lay your old belt flat and measure end-to-end—any deviation means wrong fit.
• Belt type: A-section (standard V-belt). Not compatible with Kevlar or metric belts.

Key Things to Know

• Quality: Aftermarket belt; adequate for residential use but may wear faster than OEM on heavy-duty or commercial mowing.
• Installation: Moderate difficulty. You’ll need to remove the deck, release the tensioner pulley, and route the belt per your deck diagram (available online). A belt tool helps.
• Common gotcha: Check all pulleys for damage or debris before installing. A seized idler pulley will shred a new belt fast.
• No warranty: Aftermarket belts rarely come with a warranty, so inspect for defects immediately.

Should You Buy It

If you need a budget-friendly, direct replacement for a 46” AYP/Poulan/Husqvarna/Craftsman deck and your old belt is worn or broken, this belt works for typical home lawn care. Skip it if you mow heavy, wet grass daily or want OEM longevity—invest in a branded OEM belt instead.