Lawn Mower 405143 Deck Drive Belt 1/2 x 106 inch for Craftsman Poulan Husqvarna Ariens 46" Belt 405143 532405143 21546607 584453101

What It Is

This is a 1/2-inch-wide by 106-inch-long deck drive belt for 46-inch cutting decks on riding lawn mowers. It transfers power from the engine pulley to the blade spindles, so you can mow without the belt slipping or snapping.

Fitment & Compatibility

Before buying, confirm your mower has a 46-inch deck and requires a 1/2-inch-wide, 106-inch-long belt. This belt fits many Craftsman, Poulan, Husqvarna, and Ariens models, but double-check your machine’s model number against the OEM part numbers: 405143, 532405143, 21546607, or 584453101. It’s an aftermarket replacement, not OEM, so verify the belt routing diagram matches your deck (some decks use a different belt path). Measure your old belt’s length and width if possible—length tolerance is tight (±0.5 inches).

Key Things to Know

• Quality is adequate for the price – It’s a budget belt, not heavy-duty. Expect 1-2 seasons of normal use; heavy or wet grass may shorten lifespan.
• Installation is straightforward – You’ll need a wrench to remove the deck and release the tensioner. No special tools required, but watch for sharp edges on pulleys.
• Common gotcha: belt routing – If your deck has a reverse-idler pulley, the belt must sit correctly inside the tensioner arm. Misrouting causes slipping or premature wear.
• Not for zero-turn mowers – This is for standard lawn tractors. Check your deck shape—some 46-inch decks use a different belt length (e.g., 105-inch or 107-inch).

Should You Buy It

If you need a cheap, functional replacement for a worn 46-inch deck belt and your mower matches the listed OEM numbers, this is a solid budget pick. It’s not for heavy commercial use or decks with unusual routing, but for most homeowners, it’ll get the job done without breaking the bank.