This manual covers the Johnson Evinrude 50 HP Outboards manufactured between 1973 and 1989. These 2-stroke outboard engines are water-cooled and designed for reliable marine propulsion, featuring a lower unit with forward, neutral, and reverse gears. While specific details vary across the model years, these engines were engineered for dependable performance on a variety of watercraft. This comprehensive service repair manual provides essential information for maintaining and understanding these robust outboard motors. The purpose of this English-language service repair manual is to provide detailed guidance for owners, technicians, and mechanics. It encompasses a wide range of topics, including scheduled maintenance procedures, lubrication specifications such as fuel-oil mixture ratios, and detailed instructions for engine overhaul. Furthermore, the manual offers comprehensive troubleshooting guides for common issues, technical specifications, and information on electrical and ignition systems. By consulting this manual, users can ensure the optimal performance, longevity, and safe operation of their Johnson Evinrude 50 HP outboard engines.