ZICHAI 6N350 Series marine diesel engine is a 6-cylinder, four-stroke, direct-injection medium-speed diesel engine designed for marine main propulsion applications. With a 350 mm cylinder bore and 450 mm piston stroke, the 6N350 series covers a rated power range of 2940-3969 kW (4000-5400 PS) at 600-660 r/min. Featuring turbocharging and intercooling, the engine provides reliable performance for cargo vessels, engineering vessels, tugboats and other commercial vessels. Different 6N350 engine models are available with various power and speed ratings to match vessel design, marine gearbox and propulsion system requirements.