This service repair manual covers Yamaha outboard motors, specifically models F20A, F25A, and F25X. These gasoline-powered outboard motors are designed for a range of marine applications, offering reliable performance and efficient operation. This manual is written in German and provides comprehensive information for the repair and maintenance of these units, ensuring their continued optimal function. The scope of this manual is extensive, detailing general information, specifications, periodic inspection and adjustment procedures, and in-depth guidance on the fuel system, power unit, lower unit, bracket unit, and electrical system. It also includes a dedicated section for troubleshooting and provides wiring diagrams for various configurations (MH, EH, EHT, E, ET). This resource is essential for owners, mechanics, and technicians seeking to maintain, diagnose, and repair their Yamaha outboard motors effectively.