This manual covers the Mercury Mariner, a 4-stroke outboard engine designed for marine propulsion. Engineered for reliability and performance, the Mariner delivers 50 HP and utilizes a water-cooled system with gasoline fuel. Its transmission features a standard outboard lower unit with forward, neutral, and reverse gears. This engine is built to provide dependable operation in various aquatic environments. This comprehensive Service Repair Manual provides detailed information essential for the maintenance and repair of your Mercury Mariner outboard engine. It covers critical procedures, technical specifications, and troubleshooting guidance to ensure optimal performance and longevity. Whether you are a boat owner performing routine upkeep or a technician addressing complex issues, this manual serves as an indispensable resource for all aspects of engine care and service.