Designed for 800–1,600-ton inland transport ships, 18–28-meter fishing boats, and sightseeing vessels, the Yuchai YC6MJ410L-C24J Marine Auxiliary Engine provides stable and efficient auxiliary power for a wide range of marine applications. By combining European engineering concepts with advanced combustion and noise-reduction technologies, it achieves an excellent balance of safety, economy, comfort, and long-term durability.

Safe and Comfortable Operation

The engine is equipped with digital intelligent local and remote monitoring instruments, enabling real-time operation monitoring and improved safety control. An integrated cast iron freshwater-cooled exhaust manifold reduces engine room temperature and enhances operational safety. In addition, an integral crankcase with a rear-mounted gear train and patented point-line meshing gear technology significantly lowers noise levels compared with similar domestic products, creating a quieter and more comfortable onboard environment.

Fuel Efficient and Cost Saving

An optimized fuel injection pump improves fuel consumption performance beyond that of domestic engines in the same power range. Four-valve technology greatly increases intake and exhaust flow area, while the centrally positioned fuel injector ensures more uniform atomization and more complete combustion. Furthermore, the addition of valve stem seals and Yuchai’s proprietary piston ring sealing and valve seal technologies reduce lubricating oil consumption by more than 50% compared with domestic engines of similar power.

Reliable and Durable

The engine follows strict mechanical development and validation standards. During development, it undergoes extensive testing, including thermal shock tests, high-temperature and low-temperature tests, crankshaft fatigue tests, and more than ten other validation procedures. Maximum torque reaches 2,150 N·m, ensuring strong load-handling capability. Developed using European technology and comprehensive mechanical development processes, the engine achieves a major overhaul interval exceeding 12,000 hours, supporting long-term reliable operation.