This workshop service repair manual covers the Mercury Mariner 80 HP Jet outboard engine, specifically designed for models featuring the 80 HP Jet configuration. Engineered for reliable performance on the water, this engine is a testament to Mercury's commitment to quality marine propulsion. Its robust construction and advanced features, such as the jet drive system and likely fuel injection and CDI ignition, ensure efficient operation and durability for a wide range of boating applications. This comprehensive English-language manual provides detailed guidance for maintaining and repairing your Mercury Mariner 80 HP Jet engine. It covers essential procedures, technical specifications, and troubleshooting steps necessary for optimal performance and longevity. Owners, technicians, and mechanics will find invaluable information on lubrication, fuel, ignition, and other critical systems, empowering them to keep this powerful outboard running smoothly and efficiently.