This manual covers the Yamaha 2SD outboard motor, manufactured in 1990. This 2-stroke, water-cooled engine features an in-line 2-cylinder configuration with a displacement of 294 cc, producing 20 horsepower. Its robust engineering is designed for reliable performance in marine applications. This Factory Service Repair Maintenance Manual provides comprehensive guidance for the Yamaha 2SD. It includes detailed information on general operations, periodic inspections and adjustments, fuel and electrical systems, power unit, lower unit, and bracket unit. With step-by-step instructions, diagnostic procedures, and visual aids such as diagrams and illustrations, this manual is an essential resource for owners and technicians to ensure proper maintenance and repair.