This manual covers the Yamaha 75HP and 90HP 4-Stroke EFI Outboard motors manufactured between 2005 and 2009. These outboard motors are engineered for reliability and performance, offering advanced Electronic Fuel Injection for efficient operation. Their robust design makes them suitable for a wide range of marine applications, ensuring dependable power for various boating needs. This comprehensive repair, service, and shop manual provides detailed information essential for maintaining and repairing your Yamaha outboard motor. It includes sections on general information, routine maintenance, engine systems, fuel and lubrication, electrical systems, and advanced troubleshooting. The manual is designed to assist owners, mechanics, and technicians in performing all necessary service and repair tasks accurately and efficiently.