This Service Repair Workshop Manual provides comprehensive information for the Mercury Mariner 5 HP 4-stroke outboard engine. Designed for reliable performance on the water, this engine features a water-cooled, single-cylinder, 4-stroke design that operates on unleaded gasoline. Its robust construction and efficient power delivery make it suitable for a variety of small boating applications. This manual covers multiple model years of the 5 HP 4-stroke Mariner, ensuring broad applicability for owners and technicians. The purpose of this manual is to serve as an authoritative guide for the maintenance, repair, and technical understanding of the Mercury Mariner 5 HP 4-stroke outboard. It includes detailed procedures for routine servicing, troubleshooting common issues, and accessing critical technical specifications. By following the instructions within this English-language manual, owners and service professionals can ensure the longevity, optimal performance, and safe operation of their Mercury Mariner outboard engine.