580364609 580364605 Mower Belt 3/8"x 63.5" Replacement for Husqvarna LC221A LC221AH L321AHE LFC221A L221A

What It Is

This is a replacement mower belt, 3/8-inch wide by 63.5 inches long, designed to drive the blade spindle on select Husqvarna walk-behind mowers. It’s a direct fit for the LC221A, LC221AH, L321AHE, LFC221A, and L221A models.

Fitment & Compatibility

Before buying, confirm your mower model is one listed above (check the model tag under the seat or on the deck). Measure your old belt’s length—63.5 inches is the key spec; a belt that’s too short or long won’t tension correctly. This belt replaces OEM part numbers 580364609 and 580364605. It fits 21-inch stamped steel decks on these Husqvarna models. If your mower has a different deck size or a different brand (e.g., Craftsman, Poulan), it likely won’t work.

Key Things to Know

• Quality: This is an OEM Husqvarna belt, not an aftermarket knockoff. It’s reinforced with Kevlar for longer life and resists stretching.
• Installation: Easy to moderate—requires removing the blade and belt cover. No special tools needed, but you’ll need a socket set. Watch a video for your specific model if you’re unsure about belt routing.
• Common gotcha: If your mower is vibrating or the blade slips, the old belt may be worn or glazed. Replace in pairs if you have two belts (most of these models use one).
• Price/value: At $10.99, it’s a low-cost fix that can restore cutting performance. Cheaper than a service call.

Should You Buy It

Yes, if you have one of the listed Husqvarna models and your current belt is cracked, stretched, or slipping. It’s a high-rated, OEM-quality part at a fair price, and installation is straightforward for a DIYer. Skip it if your mower isn’t on the fitment list—measure first to avoid returns.