The Yuchai YC6MJ Marine Main Engine is designed for inland waterway transport vessels ranging from 800 to 1,600 tons, fishing vessels with lengths of 18 to 28 meters, and various types of sightseeing boats. Developed with proven European engineering concepts, the Yuchai YC6MJ Marine Main Engine delivers reliable performance, strong durability, and comfortable operation, making it an ideal marine propulsion solution for small and medium-sized vessels.

Safe and Comfortable Operation

The Yuchai YC6MJ Marine Main Engine is equipped with digital intelligent local and remote monitoring instruments, which allow operators to monitor engine status in real time. In addition, an integrated cast-iron fresh-water-cooled exhaust manifold effectively reduces engine room temperature, improving operational safety. Furthermore, the rear-mounted gear train with patented point-line meshing technology significantly lowers mechanical noise compared with similar domestic products, creating a quieter and more comfortable onboard environment.

Fuel Saving and Cost Efficiency

The YC6MJ marine diesel engine adopts an optimized fuel injection pump, achieving fuel consumption levels better than domestic engines in the same power range. At the same time, four-valve technology greatly increases intake and exhaust flow area, while a centrally mounted injector ensures finer fuel atomization and more complete combustion. In addition, Yuchai applies proprietary piston ring sealing and valve stem seal technologies, reducing lubricating oil consumption by more than 50 percent compared with similar domestic engines. As a result, the Yuchai YC6MJ Marine Main Engine helps operators significantly reduce operating costs.

Reliable and Durable Design

During development, Yuchai followed stringent mechanical validation standards for the YC6MJ marine engine. The engine passed multiple verification tests, including thermal shock tests, high- and low-temperature operation tests, and crankshaft fatigue tests. With a maximum external characteristic torque of up to 2,150 N·m, the engine delivers strong and stable power output. Moreover, reliability development based on European engineering processes ensures a major overhaul interval exceeding 12,000 hours, providing long service life and dependable performance for the Yuchai YC6MJ Marine Main Engine.