This workshop repair manual covers the Yamaha F250L and F250 marine outboard motors. These four-stroke gasoline engines deliver 250 horsepower and are engineered for reliable performance in marine applications. This manual is designed to assist with the repair, maintenance, and troubleshooting of these robust outboard motors, ensuring their continued optimal operation on the water. The scope of this manual is comprehensive, detailing general information, specifications, periodic checks and adjustments, and in-depth procedures for the fuel system, power unit, lower unit, bracket unit, and electrical system. It also includes essential trouble-analysis sections. This resource is invaluable for marine mechanics of all skill levels, as well as for owners seeking to understand and perform maintenance and repair tasks, covering everything from determining the cause of problems to disassembly, inspection, rebuilding, and assembly.