This service repair manual covers Yamaha F20A, F25A, and F25X outboard motors. These 4-stroke, water-cooled engines are designed for marine propulsion, utilizing a propeller for thrust. The F20A models deliver 20 horsepower, while the F25A and F25X models offer 25 horsepower. These units are engineered for reliability and performance in various marine applications, featuring fuel injection and CDI ignition systems for efficient operation. This comprehensive manual provides detailed information essential for the maintenance and repair of your Yamaha outboard motor. It includes in-depth coverage of inspection and adjustment procedures for critical systems such as the fuel system, power unit, lower unit, and electrical system. Troubleshooting guides are also provided to assist in diagnosing and resolving common issues, ensuring your engine remains in optimal working condition. The manual is available in English, French, German, and Spanish.