This workshop service repair manual covers the Mercury Mariner outboard motor manufactured between 1987 and 1993. This 80 HP, 3-cylinder, water-cooled engine is designed for reliable performance in marine applications. Its robust construction and proven engineering ensure durability and consistent operation for a wide range of boating activities. This comprehensive manual provides essential information for maintaining and repairing your Mercury Mariner outboard motor. It details routine maintenance procedures, troubleshooting common issues, and offers in-depth technical specifications. Owners, mechanics, and technicians will find guidance on everything from fluid changes and filter replacements to cooling system service and drive unit operation, ensuring optimal performance and longevity of the engine.