This factory service manual covers Yamaha Outboard Motors manufactured between 1999 and 2003. These engines are known for their reliable two-stroke performance, with models including the C60 (965 cc, 60 hp), 70 (1052 cc, 70 hp), C75 (1232 cc, 75 hp), and B90 (1324 cc, 90 hp). Engineered for demanding marine environments, these outboards offer robust power and efficiency for a variety of watercraft. The purpose of this manual is to provide comprehensive information for the maintenance, repair, and servicing of your Yamaha outboard motor. It includes detailed procedures for lubrication, service schedules, engine specifications, and troubleshooting guidance. By following the instructions within this English-language, printed manual, owners and technicians can ensure optimal performance and longevity of their Yamaha outboard engines.