This workshop repair service manual covers the Mercury Mariner Sea Pro outboard motor. Designed for marine applications, this gasoline-powered motor delivers 15 horsepower, providing reliable performance for various boating needs. Its robust construction and efficient engineering are hallmarks of Mercury's commitment to quality and durability in marine propulsion systems. This comprehensive manual is your essential guide to understanding, maintaining, and repairing your Mercury Mariner Sea Pro. It details all aspects of the outboard motor, including scheduled maintenance procedures, fluid capacities, tune-up specifications such as spark plug types, and cooling system information. The manual also covers the outboard gearcase with its forward, neutral, and reverse gear selection, ensuring you have the knowledge to keep your motor operating at peak efficiency and to address any potential issues.