The Yanmar 2QM15 is a robust marine diesel engine from the QM Series, engineered for reliable performance in maritime applications. This compact, two-cylinder, water-cooled engine boasts a displacement of 538 cc, delivering 15 HP at 3200 RPM. Its durable construction and efficient design make it a dependable choice for various marine vessels. The engine's specifications, including a 70 mm bore and 70 mm stroke, highlight its precision engineering, ensuring consistent power output and longevity. This Service Shop Repair Manual provides comprehensive guidance for the Yanmar 2QM15 marine diesel engine. It covers essential areas including servicing, repair, preventative maintenance, and troubleshooting. Detailed technical specifications, maintenance procedures, and recommended fluids are included to assist owners, mechanics, and technicians. The manual's objective is to facilitate the proper upkeep and repair of the engine, ensuring its optimal performance and extended operational life.