Current Lead Times: In Stock Engines Ship Same or Next Day - Out of Stock: 1-3 Weeks on Most Long Block Engines; 3-5 Days on Heads – *call us for more exact lead times for your specific build
The 2004.5–2007 Cummins 5.9L marine engine delivers strong torque, improved efficiency, and proven reliability. This updated 24-valve inline-six runs the Bosch high-pressure common rail fuel system for better throttle response, cleaner emissions, and precise fuel use.
A cast iron block, forged crankshaft, and reinforced internals handle heavy loads and long hours on the water. Upgraded injectors and electronics enhance performance in both commercial and recreational vessels. Marine-grade materials and a closed cooling system protect against saltwater and heat.
Power your boat with trusted Cummins strength—choose the 5.9L marine engine built to perform.
Building engines the way the OEM factory should have in the first place.
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