This repair manual covers the Yanmar 2QM15 marine diesel engine, designed for reliable marine propulsion. Engineered for durability and performance, the 2QM15 represents a commitment to quality in marine power systems. Its robust construction and efficient diesel operation make it a trusted choice for various marine applications, ensuring consistent power and operational longevity. This comprehensive manual provides essential information for maintaining and repairing your Yanmar 2QM15. It details routine maintenance, engine removal and installation, and specific system upkeep, including fuel, lubrication, cooling, intake, exhaust, electrical, and steering systems. Advanced troubleshooting guidance and parts lookup information are also included, empowering owners and technicians to ensure optimal engine performance and longevity.