580364603 Lawn Mower Drive Belt Fits for Husqvarna HU675AWD HU700AWD HU725AWD HU800AWD Replaces 580364610 (3/8" x 64-1/2")

What It Is

This is a 3/8" wide, 64-1/2" long V-belt that drives the self-propelled wheels on select Husqvarna AWD walk-behind mowers. It transmits power from the engine pulley to the transmission, enabling the mower to move forward under its own power.

Fitment & Compatibility

Check your model and OEM part number – this belt fits Husqvarna HU675AWD, HU700AWD, HU725AWD, and HU800AWD models. It replaces OEM part 580364610 (the original may have a slight design change). Measure your old belt – the exact dimensions are 3/8" top width and 64-1/2" outside length. If your existing belt is worn or stretched, compare it to these specs. This is a direct aftermarket replacement, not a Husqvarna OEM belt, so it will work but may have slightly different rubber composition.

Key Things to Know

• Installation difficulty: Moderate – you’ll need to remove the blade, belt cover, and deck pulley to route the belt correctly. Expect 20–40 minutes.
• Common gotcha: The belt must be routed exactly as shown in your mower’s manual. A misrouted belt will slip or cause the wheels to not engage.
• Quality: At $15.99, it’s a budget-friendly alternative to OEM (which often costs $25+). Most users report 1–2 seasons of normal use, but heavy or wet grass may shorten its life.
• Check for wear on pulleys – if your old belt failed due to glazing or cracking, inspect the pulleys for damage. A worn pulley will quickly ruin a new belt.

Should You Buy It

If you have one of the listed Husqvarna AWD mowers and need an affordable, direct-fit replacement for a worn or broken drive belt, this is a solid choice. It’s not as durable as OEM, but for the price, it’s a practical fix for most homeowners. Skip it if you mow commercially or want maximum longevity – go with an OEM belt instead.