This repair manual provides comprehensive coverage for Mercury Mariner outboard motors manufactured between 1986 and 2003. It specifically details the 6, 8, 9.9, 10, and 15 horsepower 2-stroke models. These outboards are known for their robust engineering and reliability, making them a trusted choice for a variety of marine applications. This manual is designed to assist owners and technicians in understanding the intricacies of these dependable marine propulsion systems. The purpose of this manual is to serve as an authoritative guide for the repair, service, and maintenance of your Mercury Mariner outboard. It encompasses a wide range of topics, including general information, routine maintenance schedules, detailed engine specifications, and in-depth troubleshooting procedures. Covered areas include fuel and cooling systems, transmission, steering, electrical systems, and more. By following the instructions and guidelines within this manual, you can ensure the optimal performance and longevity of your outboard motor.