This Service Repair Workshop Manual provides comprehensive information for the Mercury Mariner Sea Pro outboard engine, specifically for 15 HP models. Engineered for reliability and performance, the Mariner Sea Pro is a robust water-cooled engine featuring a 2-cylinder, carbureted setup with a CDI ignition system and a Forward, Neutral, Reverse gearbox. Its design prioritizes durability for various marine applications, ensuring consistent operation across its intended use. This manual is meticulously compiled to serve as an essential resource for owners, mechanics, and technicians. It covers critical areas including detailed maintenance procedures, troubleshooting guides, technical specifications, and safety protocols. By following the instructions and guidelines within this document, users can effectively maintain, repair, and optimize the performance of their Mercury Mariner Sea Pro engine, ensuring its longevity and operational efficiency.