ALternator Pulley V-Belt 2.5in

The Alternator Pulley V-Belt 2.5in from Jones Racing Products is designed specifically for marine engine builders and serious boaters who require dependable charging system performance. A failing alternator pulley can leave you stranded, making this precision component essential for keeping your electrical system operating efficiently. Whether you're out on a weekend fishing trip or a multi-day expedition, this pulley is engineered to meet high-output marine application demands.

Manufactured to exacting tolerances, the 2.5-inch diameter of this pulley is optimized for V-belt drive systems commonly found in marine inboards and outboards. Its compact design minimizes rotating mass while ensuring durability under the thermal and load cycling typical of both saltwater and freshwater engines. The precisely machined surface of the pulley maintains even belt contact, which reduces slippage and energy loss—critical for maintaining charge at idle speeds when navigation electronics and auxiliary systems draw current.

This alternator pulley is ideal for engine rebuilds, alternator upgrades, or replacing worn OEM components in marine engines ranging from small displacement outboards to larger displacement inboards. Installation is straightforward for experienced mechanics or professional marine technicians familiar with V-belt systems. With its reliable performance, this pulley is a valuable addition to any marine setup.