405143 YTH22V46 Deck Belt Replacement for Husqvarna Craftsman Poulan Pro 46 Inch Lawn Mowers YTA22V46 YTH20K46 YTH21K46 YTH2246 YT46LS YTH18K46 584453101-1/2" x 105.75"

What It Is

This is a replacement deck belt for 46-inch cutting deck lawn tractors from Husqvarna, Craftsman, and Poulan Pro (models YTH22V46, YTA22V46, YTH20K46, YTH21K46, YTH2246, YT46LS, YTH18K46, and similar). It drives the mower blades and is designed to replace OEM part 584453101.

Fitment & Compatibility

Before buying, confirm three things: (1) your deck is 46 inches (measure blade tip to blade tip), (2) your mower model is one of the listed Husqvarna, Craftsman, or Poulan Pro units (check the model plate under the seat), and (3) the belt dimensions match: 1/2 inch wide by 105.75 inches long. This is an aftermarket belt, not OEM, but it meets the OEM spec. Verify belt routing diagram under your deck or in your manual—incorrect routing will cause slipping or poor cutting.

Key Things to Know

• Quality: Belts at this price point may wear faster than OEM. Expect 1-2 seasons under normal use, less if you mow wet grass or heavy debris.
• Installation difficulty: Moderate. You’ll need to remove the deck or at least the belt guard, release tension from the idler pulley, and route the belt per diagram. A socket set and a pry bar for tensioning help.
• Common gotcha: The belt can be tight—use a belt tool or a long screwdriver to lever the idler pulley. Don’t force it; you can damage pulleys or the belt.
• Measurement check: If your old belt is stretched or broken, measure it flat (not looped) to confirm 105.75 inches. A 0.5-inch deviation can cause poor engagement.

Should You Buy It

If you need a budget-friendly replacement for a 46-inch Husqvarna/Craftsman/Poulan Pro mower and don’t want to pay OEM prices, this belt works. It’s fine for homeowners with one or two mowers who can handle a straightforward installation. Skip it if you mow commercially, need maximum durability, or want a perfect OEM fit—spend more on a genuine Husqvarna or Gates belt.