Heavy-Duty 6 Rib 28.94in Long Serpentine Belt

The Heavy-Duty 6 Rib 28.94in Long Serpentine Belt from Jones Racing Products is engineered for marine and boating applications where reliable power transmission is non-negotiable. Whether you're running a performance inboard engine or a high-output marine diesel, this serpentine belt keeps your alternator, water pump, and accessory drives running in sync during extended days on the water. Built to withstand the vibration, thermal cycling, and salt-air environment that comes with serious boating, this belt replaces worn or damaged factory serpentine belts that can fail at the worst possible moment—miles offshore or in challenging conditions.

The six-rib design maximizes contact area and grip with drive pulleys, distributing load more evenly than single-rib belts and reducing slippage under high-load conditions common in marine powertrains. At 28.94 inches in length, this belt is sized for mid-range marine engines that demand consistent, steady drive across multiple accessories simultaneously. The heavy-duty construction resists cracking, glazing, and premature wear from the constant thermal stress of marine use—critical when you can't afford belt failure between service intervals. Jones Racing Products' manufacturing standards ensure precise rib geometry and compound formulation for marine-grade durability and longevity.

This serpentine belt is ideal for boat owners and marine technicians servicing inboard engines, marine auxiliary systems, and high-performance marine powerplants that rely on consistent accessory drive performance. Verify your engine's belt specifications and pulley configuration before ordering to ensure proper fit and tension. The compact shipping weight of 0.17 lbs makes replacement straightforward, allowing you to carry spare belts aboard for extended cruising or remote boating scenarios where replacement parts are hard to source.