2 Pack 587973001 Idler Pulley & 587969201 Lawn Mower Idler Pulley Compatible with Husqvarna HU725AWDE HU675AWD HU800AWDH HU700AWD HU775AWD LC356AWD LC221A L221A L321AH, Replaces 581904001 580364301

What It Is

This is a 2-pack of idler pulleys designed to guide and tension the drive or deck belt on select Husqvarna and AYP-branded lawn tractors and AWD walk-behind mowers. The set includes one 587973001 and one 587969201 pulley, replacing OEM numbers 581904001 and 580364301.

Fitment & Compatibility

Before buying, confirm your mower model from the list: HU725AWDE, HU675AWD, HU800AWDH, HU700AWD, HU775AWD, LC356AWD, LC221A, L221A, L321AH. These pulleys are for 42-inch and 46-inch deck tractors, plus select AWD walk-behinds. Measure the original pulley outer diameter (approx. 3.75 inches) and shaft bore (typically 5/8 inch). If your model isn’t listed, cross-reference the OEM numbers (581904001 or 580364301) with your parts diagram. These are aftermarket replacements, not genuine Husqvarna—fitment is identical, but material may differ slightly.

Key Things to Know

• Quality: Aftermarket pulleys are generally fine for residential use, but the bearings may wear faster than OEM under heavy commercial loads.
• Installation difficulty: Easy—remove the belt, unbolt the old pulley (usually a single bolt), and swap. No special tools needed beyond a socket set.
• Common gotcha: The pulleys come as a pair, but your mower may only need one. Check if both are worn or if only one failed. Some models use different pulley sizes front vs. rear—verify orientation before installing.
• Belt compatibility: These pulleys work with standard A- or B-section V-belts. If your belt is worn, replace it at the same time to avoid premature pulley wear.

Should You Buy It

If you own one of the listed Husqvarna or AYP mowers and need a budget-friendly, direct-fit replacement for worn idler pulleys, this 2-pack is a solid value. It’s ideal for residential homeowners who want to avoid dealership pricing. Skip it if you need OEM-grade bearings for commercial use or if your mower isn’t on the compatibility list—measure first to avoid a return.