This manual covers Mercury Marine Mariner 2-Stroke Outboard engines manufactured between 1986 and 2003, specifically models 6, 8, 8 Sail Mate, 9.9, 9.9 Sail Power, XR/Mag Viking 10, Sea Pro/Marathon 10, 15, and Sea Pro/Marathon 15, with serial numbers 0A197112 and up. These robust two-stroke outboards, ranging from 6 to 15 horsepower, are engineered for reliability and performance in various marine applications. Their durable construction and efficient design have made them a trusted choice for boaters seeking dependable power. This comprehensive workshop service repair manual provides detailed information essential for the maintenance and repair of your Mercury Marine Mariner outboard. It includes in-depth sections on general information, specifications, routine maintenance, troubleshooting, and detailed procedures for the engine's mechanical, electrical, fuel, cooling, and starting systems, as well as transmission, controls, and steering. With high-definition diagrams and very detailed instructions, this manual is an indispensable resource for owners, mechanics, and technicians to ensure optimal performance and longevity of their engine.