This service repair manual covers the Mercury Mariner XR-6 outboard motor, produced between 1992 and 2000. This 2-stroke, inline 6-cylinder engine delivers 150 horsepower (112 kW) from its 2597 cc (158.5 ci) displacement. Featuring a carbureted fuel system, CDI ignition, and water cooling, the Mariner XR-6 is designed for reliable marine propulsion. Its robust construction and advanced features, including reed valves and through-propeller hub exhaust, ensure efficient performance on the water. The outboard propeller drive is paired with a gearbox offering an approximate 1.87:1 gear ratio, and the unit weighs 372 lbs. This manual provides comprehensive guidance for maintaining and repairing your Mercury Mariner XR-6. It details essential procedures for engine overhaul, fuel system, ignition system, electrical system, gearcase, cooling system, and trim and tilt operations. Regular maintenance schedules, including lubrication specifications like Mercury Outboard Oil 2 Stroke with a 50:1 fuel-to-oil ratio, spark plug gap settings, and gearcase oil capacity, are clearly outlined. Troubleshooting sections offer solutions for common issues, empowering owners and technicians to keep the engine operating at peak performance and reliability.