Cummins 6BT Marine

Price: $28,000

Drop in package ready for sea:

The Cummins 6BT Marine is a marinized version of the legendary 5.9-liter inline-six diesel built by Cummins, designed specifically for reliability and efficiency in harsh marine environments. Commonly found in small commercial vessels, fishing boats, and recreational cruisers, the 6BT Marine delivers strong low-end torque that is ideal for pushing heavy hulls through the water while maintaining excellent fuel economy. It features corrosion-resistant components, marine-grade cooling systems such as heat exchangers or keel cooling, and robust turbocharging suited for continuous operation. Known for its simple mechanical design in earlier variants, the engine is relatively easy to service at sea, which has made it a trusted choice among boat owners and marine operators who value durability, long service intervals, and dependable performance.