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

What It Is

This is a replacement drive belt (3/8" x 63.5") designed for select Husqvarna walk-behind mowers. It transfers power from the engine to the blade(s) on models like the LC221A, LC221AH, L321AHE, LFC221A, and L221A.

Fitment & Compatibility

• Check your model number – Works only for the specific Husqvarna models listed (LC221A, LC221AH, L321AHE, LFC221A, L221A). Not universal.
• Measure your old belt – Confirm it’s 3/8" wide and 63.5" long. Slight variation can cause slipping or poor engagement.
• Deck size – Fits 21-inch and 22-inch cutting decks on compatible models. Verify your deck size matches.
• OEM vs aftermarket – This is an OEM Husqvarna part (580364609 / 580364605), not a generic. Expect better fit and durability than no-name belts.
• Check pulley condition – Inspect pulleys for wear or damage before installing; worn pulleys will shorten belt life.

Key Things to Know

• Quality – OEM construction with Kevlar-reinforced cords for longer life and reduced stretching. Outlasts most aftermarket belts.
• Installation – Moderate difficulty. Requires removing the blade or deck shield. No special tools, but follow your mower’s routing diagram carefully.
• Common gotcha – The belt must be routed exactly over all pulleys and tensioners. A misrouted belt can cause blade disengagement or rapid wear.
• Compatibility note – Double-check your model suffix (e.g., LC221A vs LC221AH). Some variants use different belt lengths.

Should You Buy It

Yes, if you own one of the listed Husqvarna models and need a reliable, OEM-spec replacement. It’s a solid value at $9.99 with strong user reviews. Avoid if your mower isn’t on the fitment list or if you need a belt for a different brand/deck size.