This service repair manual covers Yamaha outboard motors, specifically the 150A, L150A, 175A, 200A, and L200A models. These engines are engineered for reliable performance, offering power outputs of 150 HP, 175 HP, and 200 HP. The manual is designed to provide comprehensive information for maintaining and repairing these robust power units, ensuring their continued operational efficiency. The purpose of this manual is to serve as a definitive guide for owners, mechanics, and technicians. It includes detailed procedures for general information, specifications, fuel system, lower unit, bracket unit, and electrical system. With step-by-step operations and real photo illustrations, schemes, and diagrams, this English language manual facilitates accurate troubleshooting, scheduled maintenance, and in-depth repairs, covering all aspects of the outboard motor's functionality.