This workshop service manual covers the Mercury Mariner Jet 80 HP Jet outboard engine. Engineered for reliable performance, this gasoline-powered, water-cooled jet drive unit is designed for a variety of marine applications. Its robust construction and efficient 80 HP output ensure a capable and dependable boating experience. This comprehensive manual provides detailed guidance for the repair and overhaul of your Mercury Mariner Jet engine. It includes essential information on maintenance procedures, troubleshooting common issues, diagnostic steps, and technical specifications necessary for proper upkeep. Owners, mechanics, and technicians will find the resources within this document invaluable for maintaining the optimal performance and longevity of the engine.