584453101 405143 Mower Deck Belt Kevlar for YTH20K46, YTH21K46, YTH22V46 Husqvarna 46 inch Deck Belt, Craftsman YT3000 Riding Mower Parts, Replaces 584453101, 405143, 532405143-1/2" x 106"

What It Is

This is a Kevlar-reinforced 46-inch mower deck belt, 1/2-inch wide by 106 inches long, designed to drive the blades on Husqvarna and Craftsman riding mowers with a 46-inch cutting deck. It replaces OEM part numbers 584453101 and 405143.

Fitment & Compatibility

Before buying, confirm your mower has a 46-inch deck—not 42, 48, or 54 inches. This belt fits Husqvarna YTH20K46, YTH21K46, YTH22V46, and Craftsman YT3000 models with a 46-inch deck. Also compatible with many Poulan, McCulloch, and other Husqvarna-group mowers using the same OEM part numbers. Measure your old belt: it must be 1/2-inch wide and 106 inches long. If your belt is 1/2 x 105 or 107 inches, this won’t fit. Check your owner’s manual or existing belt for 584453101 or 405143 stamped on it.

Key Things to Know

• Kevlar construction improves durability over standard rubber belts, especially under heavy grass or frequent use—expect longer life but slightly less flexibility.
• Installation is moderate difficulty—you’ll need to remove the deck or at least the belt guards, route the belt around pulleys per the diagram (often under the seat or on the deck), and use a wrench to release the idler pulley tension.
• Common gotcha: the belt must be routed correctly around the deck’s spindle pulleys and idler—misrouting causes slipping, rapid wear, or blade engagement failure. Take a photo before removing the old belt.
• Aftermarket part—reliable for most users, but may have slightly different tension feel than OEM; adjust the idler arm if needed.

Should You Buy It

If you have a Husqvarna or Craftsman 46-inch deck mower needing a 1/2 x 106 belt, this is a solid upgrade from standard belts thanks to the Kevlar reinforcement. It’s a good value for DIY owners who want durability without paying the OEM premium—just double-check your deck size and belt measurements first.