Developed by Yuchai for inland waterway vessels and ocean fishing boats, the Yuchai YC6CL Marine Auxiliary Engine integrates proven diesel technologies from Germany, the United States, and Japan. Engineers followed modern European engine development processes from design to validation. As a result, this new-generation marine auxiliary engine delivers stable performance, high efficiency, and strong reliability. It serves as an ideal power solution for commercial vessels and fishing boats operating under demanding conditions.

Powerful Performance

High-efficiency turbocharging and intercooling technology increases power density and torque output. The engine maintains strong power reserves across different load ranges. Therefore, it adapts easily to changing operating conditions and supports high working efficiency during continuous marine operation.

Fuel Efficient and Cost Saving

Four-valve technology increases intake and exhaust airflow. The centrally positioned fuel injector improves fuel spray quality and combustion efficiency. As a result, exhaust smoke decreases and fuel consumption remains low. A flatter fuel curve also expands the economic operating range and helps reduce operating costs.

Easy Maintenance

The modular design simplifies installation and servicing. Wet cylinder liners and a single-cylinder single-head structure allow faster repairs. Side inspection windows further improve access. Together, these features reduce maintenance time and limit vessel downtime.

Compact Structure

The engine block uses multiple arc-shaped structures to improve strength while reducing weight. A small cylinder bore spacing shortens the engine length. This compact layout saves engine room space and supports flexible installation.

Safe, Reliable, and Comfortable Operation

A high-strength alloy cast iron block and a forged steel crankshaft ensure long-term durability. The dual-safety anti-shock pad structure improves operational safety. A freshwater-cooled intercooler extends service life. In addition, the water-cooled exhaust manifold lowers engine room temperature, creating a safer and more comfortable onboard environment.