This comprehensive service and repair workshop manual covers a range of Yamaha outboard engines, including models 150A, 150F, L150F, D150H, 175D, 200F, L200F, 200G, and 225D. These robust outboard motors are engineered for reliable performance, featuring fuel injection (EFI) for efficient power delivery and CDI ignition systems. With horsepower ratings from 150 HP up to 225 HP, these engines are designed for a variety of marine applications, offering dependable propulsion and advanced engineering characteristic of Yamaha products. This manual provides detailed information essential for the maintenance and repair of your Yamaha outboard engine. It includes sections on general information, specifications, periodic inspections and adjustments, fuel system, power unit, lower unit, bracket unit, electrical systems, and trouble analysis, complete with wiring diagrams for specific models. The content is designed to empower owners and technicians with the knowledge needed for effective DIY repairs, troubleshooting, and routine servicing, ultimately helping to maintain the longevity and optimal performance of the engine.