This service repair manual covers the Yamaha 225G, 250B, and L250B Outboard models, engines renowned for their robust performance and reliability in demanding marine environments. These powerful outboard engines, typically ranging from 200 to 250 horsepower, are engineered with advanced fuel injection and water-cooled systems to ensure optimal efficiency and longevity. Their robust construction and sophisticated design make them ideal for a wide range of recreational and professional boating applications, offering dependable power and smooth operation. This comprehensive English-language manual provides essential information for the maintenance and repair of your Yamaha outboard. It details general information, technical specifications, periodic inspections and adjustments, and specific procedures for the fuel system, power unit, lower unit, bracket unit, and electrical systems. Troubleshooting guidance and detailed diagrams are included to assist owners, mechanics, and technicians in diagnosing issues and performing necessary upkeep, ensuring your engine remains in peak condition.