This manual covers the Yamaha 60C, 70C, and 90C outboard motor models manufactured in 2005. These engines are designed for reliable performance and durability, offering power outputs of 60 HP, 70 HP, and 90 HP depending on the specific model. The engineering quality of Yamaha outboards ensures efficient operation and longevity for a variety of marine applications. This comprehensive Service & Repair Manual in English provides detailed information for maintaining and repairing your Yamaha outboard. It includes essential procedures for periodic inspection and adjustment, covering critical areas such as carburetor adjustments, fuel filter replacement, gear oil changes, and spark plug maintenance. The manual also details the electrical system, cooling system, fuel system, lubrication system, and transmission, offering troubleshooting charts, wiring diagrams, and specific torque specifications to assist owners and technicians in keeping their engines in optimal condition.