This service repair manual covers Evinrude Johnson Outboard models manufactured between 1973 and 1990. These engines, ranging from 2 to 40 horsepower, are known for their robust construction and reliable performance in various marine applications. Designed with 1-2 cylinder configurations, they typically feature carbureted fuel systems and either CDI or breaker point ignition, reflecting the engineering of their era. This manual details the specific components and systems that contribute to the enduring functionality of these outboard powerplants. The purpose of this comprehensive English-language manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of your Evinrude Johnson Outboard. It includes essential information on engine synchronization, fuel and electrical systems, gearcase service, and routine maintenance procedures such as oil changes and impeller replacement. By following the instructions and specifications outlined within, owners and technicians can ensure optimal performance, longevity, and safety of their vessel's propulsion system.