This manual covers the Mercury Mariner XR10 MAG10 outboard engine. Designed for reliable performance on the water, this gasoline-powered, water-cooled engine features an outboard gearcase transmission with forward, neutral, and reverse gears. Its robust construction and engineering aim to provide dependable operation for various marine applications. This Service Repair Workshop Manual provides comprehensive guidance for maintaining and repairing the Mercury Mariner XR10 MAG10. It details essential procedures, technical specifications, and troubleshooting steps necessary for optimal engine performance and longevity. Owners, technicians, and mechanics will find the information within this manual invaluable for ensuring the continued reliability and efficiency of their Mercury outboard engine.