Designed for medium-sized commercial vessels such as 5,000–8,000-ton transport ships and 45–60-meter fishing boats, the Yuchai YC6CA Marine Auxiliary Engine provides stable and efficient auxiliary power for demanding marine operations. By combining a compact structural layout with proven marine technologies, it achieves a balanced integration of reliability, power output, fuel efficiency, and durability, making it suitable for long-term continuous-duty use.

High Reliability

The engine adopts extensive arc-shaped structural designs to enhance overall rigidity while reducing weight. In addition, a compact small cylinder bore spacing shortens the overall engine length and improves space utilization in the engine room. As a result, stable operation and strong structural integrity are maintained under harsh marine conditions.

High Comfort

A high-strength alloy cast iron cylinder block combined with an integral forged steel crankshaft ensures excellent resistance to fatigue and deformation. Meanwhile, a specially designed dual-safety anti-shock pad structure effectively reduces vibration and noise transmission. The freshwater-cooled intercooler further improves thermal stability and corrosion resistance, contributing to smoother operation and improved onboard comfort.

High Power Performance

Advanced turbocharging and intercooling technology deliver higher power density and strong torque output. Sufficient power reserves allow quick response to load variations, while consistent performance across different operating conditions supports efficient auxiliary operation.

Low Fuel Consumption

The four-valve-per-cylinder design significantly increases intake and exhaust flow capacity. At the same time, the centrally positioned fuel injector provides more uniform atomization, resulting in more complete combustion. Consequently, exhaust smoke is reduced, fuel consumption is lower, and the fuel consumption curve remains flatter across a wide economic operating range.

High Durability

A modular design simplifies installation and maintenance. Wet cylinder liners, a single-cylinder single-head structure, and side inspection windows on the cylinder block make servicing more convenient. Therefore, maintenance time is reduced and long-term durability is enhanced, ensuring dependable auxiliary power throughout the engine’s service life.