This service repair manual covers Mercury Mariner Jet Outboard models with 45, 50, 55, and 60 horsepower ratings. These water-cooled jet drive outboards are engineered for reliable performance in marine applications. While specific dimensions and displacement vary by individual horsepower model, the core design emphasizes robust construction and efficient propulsion. This manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of your Mercury Mariner Jet Outboard. It details essential procedures, technical specifications, and safety precautions necessary to keep your engine operating at peak performance. Owners, mechanics, and technicians will find the information within this English-language manual invaluable for understanding and servicing these marine propulsion units.