This workshop service manual covers the Mercury Mariner outboard motor, produced between 2001 and 2006. Designed for marine propulsion, this 4-stroke outboard features a 50 HP engine and a CDI ignition system, utilizing gasoline as fuel. Its water-cooled system ensures efficient operation, while the outboard drive transmission provides reliable performance on the water. The engineering behind the Mercury Mariner is focused on delivering dependable power and a robust boating experience for a variety of applications. This comprehensive manual provides essential information for the maintenance, repair, and technical understanding of your Mercury Mariner outboard. It details routine service intervals, lubrication requirements, and cooling system specifics. Furthermore, the manual includes technical data on electrical systems, trim, and controls, along with performance considerations such as propeller pitch. By following the procedures and guidelines outlined within, owners and technicians can ensure the longevity and optimal performance of their Mercury Mariner motor.