This workshop service repair manual covers the Mercury Mariner 80 HP 3 Cylinder Outboard, produced between 1987 and 1993. Engineered for reliability and performance, these outboards are known for their robust 3-cylinder design, delivering efficient power for a variety of marine applications. This manual provides comprehensive information to ensure optimal operation and longevity of your Mercury Mariner outboard. This manual is designed to assist owners, mechanics, and technicians in maintaining and repairing the Mercury Mariner 80 HP 3 Cylinder Outboard. It includes detailed service and maintenance procedures, step-by-step repair instructions, and extensive diagnostic information for troubleshooting various systems, including fuel, ignition, electrical, and the power trim system. Coverage also extends to engine installation, control systems, and lower unit maintenance, offering a complete resource for all service needs.