This workshop service repair manual covers Yamaha Outboard Motors manufactured between 1984 and 1996. These gasoline-powered, water-cooled 55 HP outboard motors are designed for marine propulsion and feature a CDI ignition system and a lower unit with forward, neutral, and reverse gears. Known for their reliability and robust engineering, these Yamaha outboards are a trusted choice for a wide range of boating applications. This comprehensive manual provides essential information for the maintenance, repair, and troubleshooting of your Yamaha outboard motor. It details critical procedures for scheduled service, including engine oil and gearcase oil changes, spark plug specifications, and fuel mixture requirements for the 2-stroke engine. Technical specifications and guidance on the electrical and propulsion systems are also included, empowering owners and technicians to ensure optimal performance and longevity of the unit.