This manual covers the Mercury Mariner 15 Hp 4-stroke outboard motor. Designed for reliable performance, this water-cooled, carbureted engine offers a robust solution for various marine applications. Its engineering prioritizes durability and efficiency, making it a dependable choice for boaters seeking consistent power and straightforward operation. The 15 Hp output is suitable for a range of small to medium-sized vessels, providing ample thrust for recreational use and light commercial duties. This comprehensive English service manual provides detailed instructions for the repair, maintenance, and rebuilding of your Mercury Mariner outboard motor. It includes essential technical specifications, safety guidelines, and recommended maintenance intervals for critical components such as spark plugs and fuel filters. Whether you are a seasoned technician or an owner performing routine upkeep, this manual serves as an indispensable resource for ensuring the optimal performance and longevity of your 4-stroke engine.