The Yamaha 15 ELF Outboard, produced in 1989, represents a significant offering from the Early Outboard Era. This 15 horsepower, 2-stroke outboard motor features an inline 2-cylinder configuration with a displacement of 294 cc (17.9 ci). Engineered for reliable performance on the water, it utilizes a water-cooling system and offers Forward, Neutral, and Reverse gear selection. Its robust construction and straightforward design underscore Yamaha's commitment to quality and durability in marine propulsion. This comprehensive Service Repair Maintenance Manual provides essential information for the Yamaha 15 ELF Outboard. It covers all disassembly, repair, assembly, and inspection operations, supported by exploded diagrams to aid in understanding. The manual details critical maintenance procedures, including recommended oil types, fuel-to-oil mixture ratios, spark plug specifications, and fuel system components. It serves as an indispensable resource for owners, mechanics, and technicians seeking to maintain, troubleshoot, and repair this vintage outboard motor, ensuring its continued optimal performance.