405143 532405143 Kevlar Mower Deck Belt Fit for Husqvarna YTH22V46 YTH21K46 YTH20K46 YTH18K46 YTA22V46 YT46LS 46" Deck Replace# Craftsman Poulan Pro 584453101 21546607 (1/2" X 105-3/4")

What It Is

This is a Kevlar-reinforced replacement mower deck belt designed for 46-inch cutting decks on select Husqvarna, Craftsman, and Poulan Pro lawn tractors. It drives the blades from the engine pulley and is built to handle higher torque and heat than standard rubber belts.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size: This belt is for 46-inch decks only. Measure your deck width if unsure.
2. Model number: It fits Husqvarna YTH22V46, YTH21K46, YTH20K46, YTH18K46, YTA22V46, YT46LS, and Craftsman/Poulan Pro models using OEM part 584453101 or 21546607.
3. Belt dimensions: It is 1/2 inch wide x 105-3/4 inches long. Measure your old belt’s length (lay flat, measure end-to-end) and width. If your belt is 106 inches or slightly different, this may still work, but verify by routing pattern.

Cross-reference note: This replaces OEM Husqvarna 532405143, Craftsman 584453101, and Poulan Pro 21546607. If your model isn’t listed, check your owner’s manual or current belt part number.

Key Things to Know

• Kevlar construction: More durable than standard rubber belts; resists stretching and heat from prolonged mowing.
• Installation difficulty: Moderate. You’ll need to remove the deck or at least the belt guard, then route around pulleys. A diagram helps—take a photo before removing the old belt.
• Common gotcha: If your deck has a spring-loaded idler pulley, release tension fully to slip the belt on. Forcing it can damage the belt or pulley.
• Break-in period: Expect slight initial wear. After 1-2 hours of use, recheck belt tension and adjust if needed.

Should You Buy It

If you own a 46-inch Husqvarna, Craftsman, or Poulan Pro tractor listed above and need a belt that lasts longer than standard options without breaking the bank, this is a solid choice. Its Kevlar reinforcement and 4.6-star rating from 164 reviews suggest good value for light to heavy residential use. Avoid if your deck is non-standard or you need an OEM-specific belt for warranty reasons.