This repair manual covers the Yamaha 45HP 4-Stroke Outboard and 50HP 4-Stroke Outboard models manufactured between 1996 and 1998. These water-cooled, 4-stroke engines are engineered for reliable performance in various marine applications. The Yamaha outboard line is recognized for its robust construction and consistent power delivery, ensuring dependable operation for boaters. This manual provides comprehensive information to support the upkeep and service of these specific outboard motor units. The purpose of this English-language repair manual is to offer detailed guidance for maintaining and repairing your Yamaha outboard. It includes essential sections covering general information, routine maintenance procedures such as oil changes and filter replacements, engine specifications, and troubleshooting guidance for common issues. Technicians and owners will find detailed instructions on systems including fuel, lubrication, cooling, electrical, and steering, enabling effective service and ensuring the longevity of the 45HP and 50HP 4-Stroke Outboard models.