This manual covers the Mercury Mariner 15 HP 2-Stroke outboard motor, manufactured between 1986 and 2003. This robust engine is designed for reliable performance, featuring a 2-cylinder, 2-stroke configuration with a displacement of 262 cc, delivering 15 horsepower at 5000 RPM. Its water-cooled system and efficient fuel delivery via a carburetor ensure consistent operation. The outboard lower unit provides forward, neutral, and reverse gears with a 2.15:1 gear ratio, making it suitable for a variety of small watercraft applications. This comprehensive Full Service Repair Manual in English provides detailed guidance for maintaining and repairing your Mercury Mariner 15 HP 2-Stroke outboard. It includes essential information on lubrication, including the correct TC-W3 certified 2-stroke oil and fuel/oil mix ratio, as well as gearcase oil specifications. You will find procedures for routine maintenance, troubleshooting common issues, and technical specifications necessary for optimal performance and longevity. This manual is an indispensable resource for owners and technicians alike.