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

What It Is

The 405143 deck drive belt transfers power from the engine pulley to the mower deck spindles, spinning the blades on 46-inch cutting decks. It’s designed for residential lawn tractors from AYP (American Yard Products), Poulan, Husqvarna, and Craftsman.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: Only fits 46-inch decks. Measure your deck width if unsure.
• Model numbers: Confirmed fit for Craftsman models 917, 247, 944 series, Husqvarna YTH2348, Poulan PPB46, and AYP-built units. Cross-reference your model with OEM part numbers 532405143, 21546607, or 584453101.
• Belt dimensions: OEM spec is 1/2-inch width x 96.5-inch length. Measure your old belt’s length (lay it flat, measure end-to-end) and width. Aftermarket versions may vary slightly—check customer reviews for length accuracy.
• Deck type: Works on side-discharge and mulching decks with standard spindle pulleys. Not for zero-turn or 42-inch decks.

Key Things to Know

• Quality: Aftermarket belts are often fine, but some buyers report shorter life than OEM. Inspect for fraying after 50 hours of use.
• Installation difficulty: Moderate. You’ll need to remove the deck, release the tensioner pulley, and route the belt per the diagram. Watch a video if you’re new.
• Common gotcha: The belt can slip if the tensioner spring is weak or if pulleys are worn. Replace any damaged pulleys at the same time.
• Deck removal: On many tractors, you must disconnect the deck lift linkage and drive shaft (if applicable). Have a jack or blocks ready.

Should You Buy It

If you have a 46-inch Craftsman, Husqvarna, or Poulan tractor and need a reliable, budget-friendly belt for normal residential mowing, this is a solid pick. It’s not heavy-duty for commercial use, but it’s a direct fit for most AYP-built decks and saves money over OEM.