This manual covers the Yamaha 50EJRX, a 1999 model outboard motor. This 2-stroke, 3-cylinder engine boasts a displacement of 703 cc, a bore of 72 mm, and a stroke of 70 mm, delivering 50 HP. It features carburetor fuel induction, water cooling, and a CDI ignition system, designed for reliable performance in marine applications. The transmission is an outboard motor type with a 2.00:1 gear ratio and Forward-Neutral-Reverse gear selection. Notable features include electric start and a 10 Amp alternator output at 1000 RPM, with trim systems potentially varying between manual tilt and power trim & tilt depending on the specific model configuration. This comprehensive Service Repair Maintenance Factory Professional manual in English provides essential information for owners and technicians. It details routine maintenance procedures, including recommended service intervals, specific oil types for the 2-stroke engine and gearcase, and the correct spark plug type (NGK BR7HS-10). The manual also covers technical specifications and troubleshooting guidance to ensure the optimal performance and longevity of your Yamaha 50EJRX outboard motor. Its digital format ensures easy navigation and searchability, making it an indispensable resource for maintenance and repair.