The 2004.5–2007 Cummins 5.9L marine engine delivers strong, efficient power for demanding marine use. Its 24-valve design and Bosch high-pressure common rail system improve fuel control, throttle response, and emissions.

A cast iron block, forged crankshaft, and strengthened internals handle continuous high loads without compromise. The engine resists heat and corrosion with a closed cooling system and marine-grade components, making it ideal for workboats, fishing vessels, and cruisers.

Run with confidence—power your vessel with the proven 5.9L Cummins marine engine.