This workshop repair manual covers Mercury Mariner Outboard engines manufactured from 1997 onwards. These 2-stroke engines are known for their robust construction and reliable performance, offering power output options of 115 HP and 125 HP. Designed for marine applications, these outboards feature water-cooled systems and carbureted fuel delivery, typical of their era, ensuring efficient operation on the water. The manual provides comprehensive information to understand and maintain these powerful marine propulsion units. The purpose of this extensive English-language manual is to serve as a definitive guide for the maintenance, diagnosis, service, and repair of Mercury Mariner Outboard engines. It contains thousands of pages detailing critical information such as electrical diagrams, torque settings, fluid capacities, and recommended service intervals for essential components like spark plugs and water pump impellers. Owners, technicians, and mechanics will find the detailed procedures and technical specifications invaluable for ensuring the longevity and optimal performance of their Mercury Mariner Outboard.