405143 Mower Deck Belt 46" Drive Belt 106" X 1/2" Replacement for Ariens 21546607 AYP 405143 584453101 7133156 Craftsman 532405143 Fits Husqvarna 2246LS 2346XLS YTH22V46 YTH20K46 YTH2146XP

What It Is

This is a 106-inch by 1/2-inch drive belt for 46-inch mower decks. It transfers power from the engine pulley to the spindle blades, and it’s a common replacement for mid-size lawn tractors from Ariens, Craftsman, Husqvarna, and AYP.

Fitment & Compatibility

Before buying, confirm three things: your deck size is exactly 46 inches (measured blade tip to blade tip), your existing belt is 106 inches long and 1/2 inch wide, and your mower model is listed—e.g., Husqvarna YTH22V46, YTH20K46, YTH2146XP; Craftsman 917.xxxxx series; or Ariens 21546607. Cross-reference OEM numbers: AYP 405143, 584453101, 7133156, Craftsman 532405143. If your machine uses a different length (e.g., 105.5 or 107 inches), this belt won’t fit. Measure your old belt or check the model tag under the seat.

Key Things to Know

• Quality: Aftermarket belt, not OEM. Most users report it works fine for 1–3 seasons, but may wear faster than a genuine Craftsman belt on heavy-use machines.
• Installation: Moderate difficulty—requires removing the deck, routing around pulleys, and re-tensioning. Have a belt diagram handy (often printed on deck or in manual).
• Common gotcha: Check all pulleys spin freely before installing. A seized idler or spindle will shred a new belt quickly.
• Length variance: Some users note it runs slightly tighter or looser than OEM. If your deck has an adjustable tensioner, you can compensate.

Should You Buy It

Buy this if you have a listed 46-inch tractor and want a budget-friendly replacement for light to moderate mowing (1–2 acres per week). Avoid it if you need an exact OEM fit for a commercial-duty machine or if your deck has unusual pulley routing—then pay more for a genuine belt.