Pulley V-Belt 3in Dia 1.125in Bore

The Pulley V-Belt 3in Dia 1.125in Bore by Jones Racing Products is the backbone of any marine engine's accessory drive system. Whether you're running a high-performance ski boat, a commercial fishing vessel, or a weekend cruiser, this belt transfers power from your crankshaft to critical components like the alternator, water pump, and supercharger. When you're miles offshore or navigating shallow flats, a worn or failing belt means dead batteries, overheating engines, and a ruined day on the water—making a quality replacement essential maintenance for any serious angler or boater.

Built with a 3-inch diameter and 1.125-inch bore, this V-belt delivers efficient power transmission through proven serpentine or multi-rib design geometry that grips pulley surfaces and resists slippage under load. The Jones Racing Products name carries weight in performance marine circles—their belts are engineered to withstand the constant thermal cycling, moisture exposure, and vibration that saltwater and freshwater engines endure. At just 0.25 lbs, the compact footprint fits tight engine bays without adding weight, while the durable elastomer compound maintains flexibility across a wide temperature range, from cool dawn departures to full-throttle afternoon runs.

This replacement belt is ideal for boat owners who want OEM or aftermarket upgrade reliability without the dealership markup. Installation is straightforward—simply route the belt around the pulley system following your engine manual, tension to spec, and you're set for thousands of hours of reliable operation. Compatibility depends on your specific engine block and accessory configuration, so verify pulley sizing and bore diameter against your current setup before ordering. Stocking a spare on longer expeditions is smart seamanship, ensuring you'll never be stranded by preventable mechanical failure.