This manual covers the Mercury Mariner outboard engine, a powerful and reliable marine propulsion system. Designed for a variety of boating applications, the Mariner engine is engineered for performance and durability. Key features include its robust V6 configuration, electronic fuel injection for optimal efficiency, and a potent 250 horsepower output. This engine is built to provide a superior boating experience through its advanced technology and quality construction. This Service Repair Workshop Manual provides comprehensive information for the maintenance and repair of your Mercury Mariner outboard. It details essential procedures, technical specifications, and troubleshooting guidance. The manual covers critical areas such as lubrication, component replacement intervals, and electrical system diagnostics. By following the instructions within this manual, owners and technicians can ensure the continued optimal performance, reliability, and longevity of their Mercury Mariner engine.