This manual covers Yamaha outboard motors, specifically models 50G, 60F, 70B, 75C, and 90A. These water-cooled outboard engines are engineered for reliable performance across their horsepower range of 50 to 90 HP, providing robust power for various marine applications. Their design emphasizes durability and efficiency, making them a trusted choice for boaters seeking dependable propulsion. This comprehensive Service Repair Workshop Manual provides detailed instructions for the maintenance and repair of your Yamaha outboard motor. It includes full service procedures, diagnostic information, troubleshooting guides, technical specifications, and clear diagrams and illustrations, including wiring schematics. This manual is designed to assist mechanics, service professionals, and owners with the necessary information to keep their engines operating optimally and efficiently.