This manual covers all 2004 Yamaha Outboard Motors, ranging in power from 2.5 HP to 300 HP. It details a wide array of models, including various configurations such as inline 2, 3, and 4-cylinder engines, as well as V6 and V8 designs. These outboards are known for their robust engineering and reliability, offering advanced features like electronic fuel injection or carbureted systems, CDI ignition, and efficient water-cooling mechanisms. The manual provides comprehensive information for maintaining these high-quality marine engines, ensuring optimal performance and longevity on the water. This comprehensive Service Repair Manual, presented in English and spanning thousands of pages, is designed to assist both do-it-yourself enthusiasts and professional technicians. It includes detailed exploded views, schematic diagrams, and step-by-step instructions for assembly and disassembly. Owners and mechanics will find extensive guidance on scheduled maintenance, diagnostic procedures for troubleshooting, and information specific to electrical systems, trim and tilt functions, and propulsion. The manual's high-quality diagrams and instructions are invaluable for proper upkeep and repair of your Yamaha outboard.