This manual covers the Johnson Evinrude 55 HP outboard motor models manufactured between 1973 and 1990. These robust outboard motors are known for their reliable performance and are designed for a variety of marine applications. The 55 HP engine, typically featuring a 2-cylinder configuration and water cooling, offers dependable power for recreational boating and other watercraft needs. This service and repair manual provides detailed information to ensure these engines continue to operate at their peak efficiency. The purpose of this comprehensive workshop manual is to provide owners, mechanics, and technicians with the necessary information for the maintenance, repair, and troubleshooting of the Johnson Evinrude 55 HP outboard motors. It includes step-by-step repair procedures, critical technical specifications, diagnostic information, lubrication recommendations, and detailed diagrams and illustrations, including wiring diagrams. The manual covers all essential systems, from the fuel and ignition systems to the power head and gearcase, offering complete guidance for upkeep and servicing.