This workshop service repair manual covers Yamaha outboard motors from the 50G, 60F, 70B, 75C, and 90A engine families. These outboard motors are engineered for reliable performance on the water, offering various power outputs tailored to specific model designations. The manual provides comprehensive coverage of the fuel system, power unit, lower unit, and bracket unit, ensuring detailed understanding of the engine's core components. The purpose of this extensive English-language manual is to serve as a definitive guide for maintenance and repair. It includes step-by-step instructions, hundreds of illustrations and photos, and detailed electrical system diagnostics with wiring diagrams. Owners and technicians will find included troubleshooting guidance, periodic maintenance schedules, and essential notes, cautions, and warnings to ensure the longevity and optimal functioning of their Yamaha outboard motor.