405143 Mower Deck Belt for Husqvarna YTH22V46 YTH20K46 YTH21K46 YTA22V46 584453101 532405143 Craftsman Poulan Pro 46 Inch, 1/2"x106",Aramid Cord

What It Is

The 405143 is a 46-inch mower deck drive belt, 1/2 inch wide by 106 inches long, built with aramid cord for durability. It transfers power from the engine pulley to the spindle blades on select Husqvarna, Craftsman, and Poulan Pro zero-turn and lawn tractors.

Fitment & Compatibility

Check these before buying:

• Deck size: Only fits 46-inch stamped or fabricated decks—not 42-inch or 54-inch.
• Exact models: Husqvarna YTH22V46, YTH20K46, YTH21K46, YTA22V46; also Craftsman and Poulan Pro 46-inch tractors with similar deck geometry.
• OEM cross-references: Replaces Husqvarna 532405143, 584453101, and Craftsman 405143.
• Measurements: Verify your old belt is 1/2" wide and 106" long. Slight variations (e.g., 105.5") may still work, but 107" or wider will slip or throw.
• Pulley check: Ensure your deck has 3 or 4 pulleys (common on 46" decks). If you have a different spindle count, this belt won’t route correctly.

Key Things to Know

• Quality: Aramid cord resists stretching and snapping better than standard rubber belts, but it’s still a budget aftermarket part—expect shorter life than OEM (1–2 seasons vs. 3–4).
• Installation: Moderate difficulty. You’ll need to remove the deck or use a belt tensioner tool. Route diagram often inside deck or in manual—snap a photo before removing the old belt.
• Common gotcha: The 106" length is tight on some decks. If you can’t get it over the last pulley, double-check routing (idler pulley order matters). Don’t force it—you may need to release the tensioner fully.
• Noise: Aramid belts can be slightly louder than rubber, especially when new. This is normal and quiets after a few cuts.

Should You Buy It

Buy if you need a quick, low-cost replacement for a 46-inch deck on a Husqvarna, Craftsman, or Poulan Pro and don’t mind replacing it every year or two. Skip if you want OEM longevity or have a different deck size—measure twice before ordering.