This manual covers the Yamaha 30ESK outboard motor, a 2-stroke, 2-cylinder model from the first generation produced in the 1980s. With 30 horsepower and a displacement of 496cc, this water-cooled engine features dual carburetors and a CDI ignition system. Its robust engineering is designed for reliable performance in various marine applications. The transmission offers Forward, Neutral, and Reverse gears with a gear ratio of 2.15:1. This comprehensive Service Repair Maintenance Manual provides detailed, step-by-step procedures for disassembly, repair, assembly, and inspection of the Yamaha 30ESK. It includes exploded diagrams before disassembly sections and is fully bookmarked and searchable for ease of use. The manual is intended to assist owners, mechanics, and technicians in maintaining and repairing the outboard motor, ensuring its optimal performance and longevity. Essential technical specifications and maintenance guidelines, including lubrication, ignition, and fuel system recommendations, are also covered.