109-8073 Kevlar Mower Deck Belt Fit for Exmark 60'' Deck Lazer Z AS/E/S/X-Series Zero Turn Mowers Replace# 135-5774 116-1985 146-0183 (5/8" X 199")

What It Is

This is a replacement Kevlar-reinforced deck belt (5/8" x 199") engineered for Exmark 60-inch zero-turn mowers, specifically the Lazer Z AS, E/S, and X-Series models. It drives the mower blades from the engine pulley to the deck spindles.

Fitment & Compatibility

Before buying, confirm your mower is an Exmark Lazer Z with a 60-inch fabricated deck (not stamped). Check your existing belt’s part number—this belt replaces OEM numbers 135-5774, 116-1985, and 146-0183. Measure your belt length: it must be exactly 199 inches with a 5/8-inch width. This belt is not compatible with 48-inch, 52-inch, or 72-inch decks, nor with older Lazer Z models using a different belt routing.

Key Things to Know

• Kevlar construction offers higher tensile strength and heat resistance than standard rubber belts, reducing stretch and extending lifespan in heavy grass or commercial use.
• Installation is moderate difficulty—you’ll need to release deck tension via the idler pulley, route the belt around all three spindles and the tensioner, and re-tension properly. Have a diagram handy.
• Common gotcha: Verify your deck pulleys are aligned and bearings are smooth. A worn idler pulley or bent spindle will shred even a Kevlar belt quickly.
• Break-in period: Expect slight initial stretch; re-check tension after the first 1–2 hours of use. Overtensioning can damage spindles or the belt itself.

Should You Buy It

If you own an Exmark Lazer Z with a 60-inch deck and want a durable, long-lasting belt for commercial or heavy residential use, this Kevlar option is a solid upgrade over standard belts. It’s not worth the extra cost for occasional light mowing on a small lawn.