405143 Mower Deck Belt for 46" Deck - Replaces Ariens 21546607, Craftsman 532405143, Husqvarna 2246LS/2346XLS, AYP 584453101 | 1/2" x 106"

What It Is

This is a 1/2" x 106" V-belt that drives the blades on 46-inch lawn mower decks. It replaces OEM part numbers Ariens 21546607, Craftsman 532405143, and AYP 584453101, and is commonly used on Husqvarna 2246LS/2346XLS and similar tractors.

Fitment & Compatibility

• Deck size must be exactly 46 inches – measure your deck width, not the mower model.
• Check your OEM part number against 21546607, 532405143, or 584453101. If yours matches, this belt fits.
• Measure the old belt – it should be 1/2 inch wide and 106 inches long. A slight variation (e.g., 105.5") may still work, but 107" or longer will cause slipping.
• Compatible brands include Craftsman, Husqvarna, Ariens, and AYP (MTD) with 46" fabricated or stamped decks. Not for zero-turn or 42"/54" decks.

Key Things to Know

• Quality is solid for the price – this is an aftermarket belt, not OEM, but users report good durability for residential mowing (1-2 seasons).
• Installation is moderate – you’ll need to remove the deck or at least the belt guard. A belt tensioner tool helps, but a socket and pry bar can work.
• Common gotcha – if your deck has a spring-loaded idler, make sure the belt routes correctly (check your deck diagram). Wrong routing causes rapid wear or blade stall.
• Check pulleys before installing – worn or rough pulleys will shred this belt quickly. Replace any that wobble or have sharp edges.

Should You Buy It

Yes, if you need a reliable, affordable replacement for a 46" deck belt on a Craftsman, Husqvarna, or Ariens lawn tractor. It’s a good value for residential use, but skip it if you mow commercially or need OEM-specific fitment for a zero-turn or older model.