This workshop service repair manual covers Yamaha 50G, 60F, 70B, 75C, and 90A outboard motors. These engines, ranging from 50 to 90 horsepower, are known for their robust engineering and reliable performance on the water. This manual is designed to provide comprehensive information for maintaining and repairing these versatile outboard motors across multiple model years and generations, ensuring their continued operational excellence. The purpose of this English-language manual is to offer complete, A-Z service and repair procedures. It includes detailed diagnostic information, part identification with diagrams, and specific guidelines for scheduled maintenance, such as recommended oil types and capacities, and service intervals. This resource is invaluable for owners, mechanics, and technicians seeking to perform routine upkeep, troubleshoot issues, or undertake complex repairs, ultimately contributing to the longevity and efficiency of your Yamaha outboard motor.