405143 Mower Deck Belt Compatible with 46" Hu sqvarna, A riens, AYP, Craftsman, Replacement for 21546607 584453101 532405143 7133156, Fit for YTH22V46 YTH20K46 YTH2146XP 2246LS 2346XLS, 1/2" x 106"

What It Is

This is a 46-inch mower deck drive belt (1/2” x 106”) that transfers power from the engine pulley to the blade spindles, enabling cutting. It’s designed for residential lawn tractors with 46-inch stamped steel decks, commonly used on Husqvarna, Ariens, AYP (American Yard Products), and Craftsman models.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Must be exactly 46 inches (measured blade tip to blade tip). Belts for 42” or 48” decks won’t fit.
• Model numbers: Confirmed fit for YTH22V46, YTH20K46, YTH2146XP, 2246LS, 2346XLS, and many similar Craftsman/Husqvarna/Ariens tractors. Cross-references include OEM #405143, 21546607, 584453101, 532405143, and 7133156.
• Physical measurements: Belt is 1/2” wide and 106” long (outside circumference). Measure your old belt if possible—aftermarket belts may vary ±0.5”, which can cause slipping or poor engagement.

Not compatible with zero-turn mowers, 54” decks, or older models using a different belt routing (e.g., some pre-2000 AYP decks).

Key Things to Know

• Quality: Aftermarket replacement, not OEM. Most users report 1–2 seasons of life on residential lawns (about 50–100 hours). Thinner than OEM in some cases—check for fraying after heavy use.
• Installation: Moderate difficulty (30–60 minutes). Requires removing the deck or accessing belt routing under the mower. You’ll need a wrench and possibly a spring puller for the tensioner. Watch a routing diagram for your specific model—routing errors cause belt flipping or premature wear.
• Common gotcha: The belt may be slightly tight initially; work it onto pulleys gradually. Avoid using lubricant on pulleys—it degrades rubber. Verify the tensioner spring is not worn out, or the belt will slip.
• Price point: At $14.99, it’s about half the cost of OEM. Fine for budget-minded owners, but expect shorter lifespan than a $30–40 OEM belt.

Should You Buy It

If you need a quick, affordable replacement for a 46” deck on a Husqvarna, Ariens, AYP, or Craftsman tractor and don’t mind replacing it annually, this belt works well. It’s not built for heavy commercial use or extended durability, but for typical residential mowing it’s a solid budget choice.