This manual covers the Yamaha 55 hp outboard motor, manufactured in 1990. This 2-stroke, 2-cylinder marine propulsion unit features a 760cc displacement and delivers 55 horsepower. Engineered for reliability, the Yamaha 55 hp outboard motor is designed for demanding marine applications, offering robust performance and enduring quality for its intended use. This comprehensive service and shop repair manual provides detailed information for the maintenance and repair of your Yamaha outboard motor. Covering every aspect from routine maintenance, such as oil changes, to complex procedures like transmission swaps, this manual is an essential resource. It is designed to assist owners and DIY mechanics with clear, easy-to-read text, illustrations, and printable pages, ensuring you can effectively keep your motor in optimal working condition.