This manual covers the Mercury Mariner outboard motor, a gasoline-powered engine designed for marine propulsion. While specific production years and generations are not detailed, this outboard motor is engineered for reliable performance on the water. Its 125 horsepower output makes it suitable for a range of boating applications, providing the power needed for various watercraft. The water-cooled system ensures efficient operation under demanding conditions. This comprehensive Service Repair Workshop Manual in English provides full service and repair instructions tailored for mechanics. It details essential maintenance procedures, troubleshooting guidance, and technical specifications necessary for the upkeep and repair of the Mercury Mariner outboard motor. By utilizing the information within this manual, owners and technicians can ensure the continued optimal performance and longevity of their marine engine.