This service repair manual covers the Mercury Mariner Marathon outboard motor, a gasoline-powered engine designed for marine applications. While specific production years are not detailed, this manual is intended to provide comprehensive information for maintaining and repairing this engine, which features a 75 HP output and a water-cooled system. The engineering behind the Mariner Marathon focuses on delivering reliable performance for boating enthusiasts and professionals alike. This manual serves as an essential resource for owners, technicians, and mechanics. It details critical maintenance procedures, offers troubleshooting guidance for common issues, and provides technical specifications necessary for accurate repairs. By following the instructions and information contained within, users can ensure the longevity and optimal performance of their Mercury Mariner Marathon outboard motor.