405143 Deck Drive Belt for 46" AYP Poulan Craftsman 532405143 584453101 21546607

What It Is

The 405143 deck drive belt transfers power from the mower’s engine pulley to the spindle pulleys on a 46-inch cutting deck, driving the blades. It’s designed for select AYP, Poulan, Craftsman, and Husqvarna lawn tractors with a 46-inch stamped deck.

Fitment & Compatibility

Before buying, confirm your mower’s deck size is exactly 46 inches (measured blade tip to blade tip). This belt replaces OEM part numbers 532405143, 584453101, and 21546607. It fits many Craftsman LT1000/3000, Poulan Pro, and Husqvarna YTH models from the 2000s–2010s. Measure your old belt’s length (should be roughly 96.5 inches) and width (1/2 inch). Check your mower’s model number—this belt is not for 42-inch or 54-inch decks. Aftermarket versions are common, but verify the belt is Kevlar-reinforced for durability.

Key Things to Know

• Quality: Most aftermarket belts match OEM specs, but cheap belts may stretch or fray quickly. Look for reinforced construction.
• Installation difficulty: Moderate. You’ll need to remove the deck or at least the belt cover and tensioner. A diagram of the belt routing is essential—take a photo before removal.
• Common gotcha: The belt must be routed around all spindle pulleys and the tensioner correctly. If the deck vibrates or blades stop spinning, the belt is likely misrouted or too loose.
• Tension: After installing, check that the belt is snug but not tight enough to strain the pulleys. The tensioner spring should hold it firmly.

Should You Buy It

If you have a 46-inch AYP/Poulan/Craftsman tractor and your blades aren’t engaging or the belt is cracked/frayed, this is a solid, affordable replacement. It’s a direct fit for most common models and offers good value for DIY repairs. Skip it if your deck size is different or you need an OEM-only part for warranty purposes.