This document pertains to the Mercury Mariner 30 Sea Pro, a 2-cylinder outboard engine designed for marine propulsion. It delivers 30 horsepower and features a water-cooled system, typically operating on gasoline. While specific model years and generations are not detailed, this engine is built for reliable performance in various aquatic environments. Its engineering focuses on delivering dependable power for a range of boating applications, emphasizing robust construction and efficient operation. This Factory Service Repair Manual provides comprehensive guidance for the Mercury Mariner 30 Sea Pro. It covers essential maintenance procedures, troubleshooting steps, and technical specifications necessary for optimal performance and longevity. The manual is intended for owners, mechanics, and technicians, offering detailed instructions and diagrams to facilitate effective upkeep and repair. With hundreds of pages in English, this resource ensures that users have the information required to maintain the engine's reliability and operational integrity.