This workshop factory service repair manual covers the Yamaha Marine Outboard 9.9V / 15V Series. These outboard motors are designed for reliable performance and efficiency, offering power outputs of 9.9 HP and 15 HP. They utilize a gasoline-powered, 2-stroke engine with a water-cooled system and a Forward, Neutral, Reverse (F-N-R) transmission. The series is available with various shaft lengths, including Short (S), Long (L), and Special/Ultra Long (SUL), catering to diverse boating needs. This comprehensive manual provides essential information for maintaining and repairing your Yamaha outboard. It includes detailed sections on general information, specifications, periodic inspection and adjustment, fuel system, power unit, lower unit, bracket unit, electrical system, and trouble-analysis. With high-quality diagrams and printable pages, this English-language manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their Yamaha Marine Outboard.