This comprehensive service manual provides detailed instructions and technical specifications for repairing and maintaining Mercury Mariner 6, 8, 9.9, 10, and 15 HP 2-stroke outboard motors manufactured between 1986 and 2003. The manual covers a wide range of topics, including general information, routine maintenance procedures, engine removal and installation, fuel and lubrication systems, cooling system operation, engine specifications, transmission, drive chain, and sprockets, steering system, shock absorbers, bodywork, intake and exhaust systems, electrical system, and advanced troubleshooting techniques. This manual is an essential resource for anyone who owns or works on these popular outboard motors, providing the information needed to keep them running smoothly and efficiently.

The 1986-2003 Mercury Mariner 6, 8, 9.9, 10, and 15HP 2-stroke outboard motors were a popular choice for recreational boaters seeking reliable and affordable power. These outboards were known for their simplicity and ease of maintenance, making them ideal for smaller boats like dinghies, fishing boats, and runabouts. Featuring a range of horsepower options, from the compact 6HP to the more powerful 15HP, these engines catered to diverse boating needs. The Mariner outboards utilized a robust 2-stroke design, renowned for its power-to-weight ratio and efficient operation, especially at lower speeds. They were equipped with a variety of features common to the era, such as manual starting, tiller steering, and a manual fuel pump. While these outboards offered reliable performance, they were also known for their high fuel consumption and emissions compared to modern 4-stroke engines.

Despite their age and the advent of newer technologies, the 1986-2003 Mercury Mariner 2-stroke outboards remain a popular choice for many boaters. Their simplicity and ease of maintenance, coupled with their affordability, make them an attractive option for those seeking basic power for their smaller boats. However, it's crucial to note that due to their age and the lack of modern safety and environmental features, these engines require careful maintenance and proper operation to ensure safe and reliable performance. Additionally, they may not comply with current environmental regulations in some regions. Therefore, before purchasing or using a 1986-2003 Mercury Mariner 2-stroke outboard, it's essential to research local regulations and ensure adherence to safety guidelines.