This workshop service manual covers the Mercury Mariner 55 HP SeaPro outboard engine. Designed for demanding marine applications, this engine is recognized for its robust construction and reliable performance. Its water-cooled system ensures efficient operation under various conditions, and it offers versatile control options with either tiller or remote steering. The engine likely features a power trim and tilt system, enhancing its adaptability and ease of use on the water. This comprehensive manual provides detailed information essential for the maintenance and repair of your Mercury Mariner 55 HP SeaPro. It includes step-by-step procedures for routine servicing, troubleshooting common issues, and technical specifications to ensure optimal performance. By following the guidelines within this English-language manual, owners and technicians can effectively maintain the longevity and functionality of the engine, ensuring continued reliable operation.