Lawn Mower 54" Deck Belt 5/8" x 154" for Husqvarna Z254 RZ 5424 RZ5426 539114557, Exmark 1-653368 LSZ RZ MZ Zero Turn Mowers with Deck

What It Is

This is a 5/8" wide by 154" long drive belt for the 54-inch cutting deck on select Husqvarna and Exmark zero-turn mowers. It transfers power from the engine to the deck spindles to spin the blades.

Fitment & Compatibility

Check these three things before buying:

• Deck size must be 54 inches. This belt will not fit 48" or 60" decks.
• Confirm your model: Fits Husqvarna Z254, RZ5424, RZ5426 (OEM part #539114557). Also fits Exmark LSZ, RZ, MZ zero-turns with 54" deck (OEM part #1-653368). Check your owner’s manual or old belt part number.
• Measure your old belt – it should be exactly 5/8" wide and 154" long. If it’s stretched or worn, use the printed length on the belt side.

Key Things to Know

• Quality is solid for the price – this is an aftermarket belt that meets OEM specs. Users report it lasts a full season with normal residential use.
• Installation is moderate difficulty – you’ll need to remove the deck or at least the belt guard, then route around tensioner pulleys. A belt diagram (usually on the deck) helps.
• Common gotcha: The belt may feel tight on first install – rotate the tensioner arm fully to relieve tension before trying to seat it. Don’t force it over pulleys.
• No pulleys included – just the belt. Inspect your idler and spindle pulleys for wear before replacing the belt.

Should You Buy It

Yes, if you own a Husqvarna Z254 or compatible Exmark zero-turn with a 54" deck and need a reliable, affordable replacement. It’s a solid value for residential mowing, but if you mow commercially or have heavy daily use, consider a premium OEM belt for longer life.