522811301 Lawn Mower Deck V-Belt 5/8" X148 1/2" for Husqvarna FD 52M, MZ 52, MZT 52 and MZT 52 BF Series Zero-Turns

What It Is

This is a replacement V-belt for the mower deck on Husqvarna zero-turn mowers, specifically the FD 52M, MZ 52, MZT 52, and MZT 52 BF series. It drives the blades and is sized 5/8" wide by 148 1/2" long.

Fitment & Compatibility

Before buying, confirm your mower’s deck measures 52 inches and your model is one of the following: FD 52M, MZ 52, MZT 52, or MZT 52 BF. This is an OEM Husqvarna belt (part number 522811301), so it matches factory specs exactly. If you have a different brand or a 54" or 60" deck, this belt won’t fit. Also verify your current belt’s length and width—a 5/8" x 148.5" belt is required; any variation will cause poor blade engagement or belt slip.

Key Things to Know

• Quality: OEM Husqvarna belts are made with reinforced rubber and have good heat and abrasion resistance. Expect 2-3 seasons of typical residential use.
• Installation: Moderate difficulty—you’ll need to remove the deck or at least the belt covers. A belt routing diagram is on the deck or in your manual; follow it exactly to avoid premature wear.
• Common gotcha: If the old belt broke, inspect all pulleys and idlers for damage or debris before installing the new one. A seized idler will destroy a new belt quickly.
• Tension check: After installation, ensure the belt is properly tensioned. If it’s too loose, it will slip; too tight, and it can damage bearings.

Should You Buy It

Buy this if you own a Husqvarna 52-inch zero-turn from the FD, MZ, or MZT 52 series and need a direct OEM replacement. It’s a solid choice for reliability and fit, especially if you want to avoid the guesswork of aftermarket belts. Skip it if your deck is a different size or brand—you’ll need a different part.