405143 Mower Belt,Drive Belt, Aramid Cord, 1/2X105.50 in,for Husqvarna YTH22V46 YTH20K46 YTH21K46 YTA22V46 584453101 532405143 Craftsman Poulan Pro 46 Inch

What It Is

The 405143 mower drive belt (1/2" wide x 105.50" long, aramid cord construction) transfers power from the engine pulley to the deck spindles on select 46-inch lawn tractors. It’s designed for Husqvarna YTH/YTA series, Craftsman, and Poulan Pro models that use a 46-inch cutting deck.

Fitment & Compatibility

Check these three things before buying:

1. Deck size: Only for 46-inch decks. Measure your current belt length (105.5 inches) and width (1/2 inch). If your belt is longer or shorter, this won’t fit.
2. Model match: Confirmed for Husqvarna YTH22V46, YTH20K46, YTH21K46, YTA22V46; Craftsman and Poulan Pro 46-inch tractors with compatible deck. Not for 42-inch or 54-inch decks.
3. OEM vs aftermarket: This is a direct replacement for OEM part 532405143 and 584453101. Aftermarket belt—check that your deck uses a single-belt drive system (not a two-belt setup).

Quick check: Look at your mower’s model number tag (under seat or on frame). If it ends in “46” and uses a single drive belt, this is likely correct.

Key Things to Know

• Aramid cord is tougher than standard rubber belts—better heat and wear resistance, but still replace every 2-3 seasons with heavy use.
• Installation is moderate difficulty. You’ll need to remove the deck, route the belt around pulleys, and re-tension. Watch a video for your specific model—routing mistakes cause slipping or premature wear.
• Common gotcha: The belt may be tight on first install. Use a 1/2-inch breaker bar on the tensioner pulley to relieve pressure. Do not force it over pulleys—you’ll damage the cord.
• Works with manual or electric PTO systems, but verify your deck has a single-belt design (most 46-inch Husqvarna/Craftsman do).

Should You Buy It

If you own a 46-inch Husqvarna, Craftsman, or Poulan Pro with a single-belt deck and need a reliable, affordable replacement, this belt is a solid choice. The aramid cord adds durability over standard belts, and the price is competitive. Avoid if you have a different deck size, two-belt system, or want an OEM-labeled part.