This manual covers Mercury Mariner 115 HP 2-stroke outboard engines manufactured between 1987 and 1993. These engines are known for their robust design and reliable performance, making them a popular choice for a variety of marine applications. This comprehensive guide addresses multiple models within the specified production years, including 3-cylinder variants such as the 70, 75, 80, and 90 HP engines, as well as 4-cylinder variants like the 100 and 115 HP engines, providing specific serial number ranges for accurate identification. The Factory Service Repair Manual in English is designed to assist both mechanics and DIY enthusiasts in maintaining and repairing these Mercury Mariner outboard engines. It details essential procedures, including installation, removal, disassembly, assembly, and general repair. Furthermore, the manual offers in-depth explanations for diagnostics and troubleshooting, alongside guidance on making necessary adjustments. With clearly outlined sequential steps and implied technical illustrations, this resource serves as an indispensable tool for ensuring the optimal performance and longevity of your Mercury Mariner engine.