This Service and Repair Manual covers Mercury Mariner 6, 8, 9.9, 10, and 15HP 2-Stroke outboard engines manufactured between 1986 and 2003. These engines are known for their reliable performance and are designed for a variety of small boat applications. Featuring a water-cooled, carbureted 2-stroke engine with CDI ignition and typically a manual recoil starter, these outboards offer dependable power for recreational boating. This comprehensive manual provides detailed information essential for maintaining and repairing your Mercury Mariner outboard. It includes step-by-step repair procedures, diagnostic guidance, electrical service information with wiring diagrams, and detailed illustrations, drawings, and photos to assist in understanding complex components. The manual is designed to help owners and technicians effectively perform routine maintenance, troubleshoot issues, and ensure the longevity and optimal performance of the engine.