This manual covers the Johnson Evinrude 30 Hp outboard motor manufactured between 1956 and 1970. These models are recognized for their robust engineering and reliability, designed to provide dependable performance for a wide range of marine applications. The comprehensive nature of the factory service information ensures that owners and technicians have access to the detailed knowledge required to keep these engines operating at their peak. The purpose of this manual is to provide complete diagnostic and repair information for the Johnson Evinrude 30 Hp models from 1956 through 1970. It includes detailed procedures for maintenance, troubleshooting, and repair of all major systems, including the powerhead, fuel, ignition, and electrical systems, as well as accessories and the lower unit. With step-by-step instructions, detailed illustrations, and wiring diagrams, this guide empowers owners and professional technicians to effectively service and maintain their engines, ensuring longevity and optimal performance.