This workshop service repair manual covers Mercury Mariner outboard jet drive engines with power outputs of 45, 50, 55, and 60 horsepower. These water-cooled gasoline engines feature a CDI ignition system and are designed for reliable performance in a variety of marine applications. The jet drive transmission provides efficient propulsion with forward, neutral, and reverse gears, and the engines are equipped with standard safety features such as a kill switch. Remote steering, either tiller or wheel, is also a standard component. This comprehensive English-language manual provides detailed information essential for the maintenance and repair of your Mercury Mariner outboard engine. It includes in-depth procedures for lubrication, engine oil and gearcase oil specifications, and guidance on intervals for tasks such as oil changes and spark plug replacement. Technical specifications, troubleshooting guidance, and safety instructions are also covered extensively. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their engine.