46" Mower Deck Belt 1/2" X 105 3/4" Compatible with POULAN Craftsman Husqvarna 405143/532405143/21546607/584453101/ 7133156

What It Is

This is a 46-inch mower deck drive belt (1/2" wide x 105 3/4" long) designed to transfer power from the engine pulley to the blade spindles on select Poulan, Craftsman, and Husqvarna riding mowers with a 46" cutting deck.

Fitment & Compatibility

Before buying, verify your mower’s deck size is exactly 46 inches and measure your existing belt’s length (end-to-end, not looped) to confirm it matches 105 3/4 inches. This belt replaces OEM part numbers 405143, 532405143, 21546607, 584453101, and 7133156. It fits many Craftsman, Poulan, and Husqvarna models from the 1990s through early 2010s with 46" stamped steel decks. Check your owner’s manual or look for a model number sticker under the seat or on the deck for exact compatibility. Not for zero-turn mowers or decks smaller/larger than 46".

Key Things to Buy

• Quality variance: Aftermarket belts (like this one) may wear faster or stretch more than OEM belts. The low price reflects this—expect replacement every 1-2 seasons under heavy use.
• Installation difficulty: Moderate. You’ll need to remove the deck, release tension from the idler pulley, and route the belt around all pulleys per the diagram under the deck. A wrench and a belt installation tool help.
• Common gotchas: The belt must be routed correctly—wrong path causes slipping or blade disengagement. Also, check that the idler pulley spring is not worn or broken; a weak spring can cause premature belt wear.
• Measurement check: If your old belt is frayed, measure it flat (not looped) to confirm 105 3/4 inches. A 1/4-inch difference can cause poor performance.

Should You Buy It

This is a budget-friendly option for DIYers with a common 46" deck who need a quick replacement and don’t mind potentially shorter lifespan. If you mow a large yard weekly or want maximum durability, spend more on an OEM belt for better fit and longevity.