This manual covers the Yamaha 25D / 25ED, a 1990 model year 2-stroke, water-cooled outboard motor. Designed for reliable performance, this engine typically produces approximately 25 horsepower and utilizes a CDI ignition system. Its robust construction and efficient design make it suitable for a variety of marine applications where dependable power is essential. The fuel system requires a gasoline and oil mixture, and the transmission offers forward, neutral, and reverse gear selection. This comprehensive Service Repair Workshop Manual in English provides detailed guidance for maintaining and repairing your Yamaha 25D / 25ED. It includes essential information on engine specifications, lubrication requirements, spark plug selection, and propeller shaft maintenance. The manual is designed to assist owners, mechanics, and technicians in performing routine servicing, troubleshooting issues, and ensuring the longevity and optimal performance of the outboard motor.