This manual covers Yamaha Outboard Motors manufactured between 2004 and 2009. These 2-stroke, 3-cylinder outboard motors are designed for reliable marine propulsion, offering power outputs of 60 HP, 70 HP, or 90 HP depending on the specific model. Engineered for performance and durability, these units provide efficient power for a variety of watercraft, featuring water-cooling systems and available in remote or tiller steering configurations. This Factory Service Manual in English provides comprehensive guidance for the maintenance, repair, and technical understanding of your Yamaha Outboard Motor. It details essential procedures, including lubrication requirements, recommended service intervals, fuel system specifications, and ignition system components. This resource is designed to assist owners, technicians, and mechanics in ensuring the optimal performance, longevity, and safe operation of the outboard motor.