This workshop service manual covers the Mercury Mariner Outboard, a powerful 225 horsepower outboard motor designed for marine applications. Built with robust engineering, this V6 engine, likely featuring fuel injection and electronic ignition, is engineered for reliability and performance on the water. Its water-cooled system and electric start contribute to its user-friendly operation, making it suitable for a range of boating activities where dependable power is essential. This comprehensive manual provides detailed guidance for the repair and overhaul of your Mercury Mariner Outboard. It is intended for technicians and outlines essential maintenance procedures, including lubrication and cooling system upkeep, alongside in-depth troubleshooting and technical specifications. By following the instructions within this document, owners and service professionals can ensure the continued optimal performance and longevity of this marine propulsion system.