This service repair manual covers the Mercury Mariner outboard engine. Designed for reliable performance, this water-cooled engine delivers 25 horsepower, making it suitable for a variety of boating applications. Its robust construction and dependable engineering ensure consistent operation for its intended use. This comprehensive manual provides detailed information for the maintenance and repair of your Mercury Mariner outboard. It includes essential procedures for routine servicing, troubleshooting common issues, and understanding technical specifications. By following the guidelines within this manual, owners and technicians can ensure the longevity and optimal performance of the engine.