This manual covers the Mercury Mariner 5 HP 4-Stroke outboard motor, designed for reliable performance in small boats, tenders, and jon boats. Engineered with a water-cooled, 4-stroke engine featuring CDI ignition and carburetor fuel delivery, this motor provides 5 horsepower with an approximate displacement of 123 cc. Its robust construction and straightforward operation make it a dependable choice for various marine applications, offering a balance of power and portability. This comprehensive service and repair manual in English provides essential information for maintaining and troubleshooting your Mercury Mariner outboard motor. It details routine maintenance procedures, including recommended oil types and capacities, spark plug specifications, and gear lubricant requirements, alongside information on its manual tilt trim system. The manual also covers technical specifications and operational details, empowering owners and technicians to ensure the longevity and optimal performance of the 5 HP 4-Stroke Mariner.