This workshop service repair manual covers Mercury Marine Mariner Outboard XR6 models from 1992 and newer. These powerful outboard engines, available in V6 configurations with horsepower ratings ranging from 135 HP to 225 HP, are known for their robust engineering and reliability on the water. Whether equipped with a carbureted or fuel injection system, and featuring a CDI ignition and water-cooled design, the Mariner Outboard XR6 is built for demanding marine applications. The manual encompasses various specific models, including the 150 XR6, 150 Magnum III, and the Pro Max and Super series, ensuring comprehensive coverage for a wide range of these esteemed engines. The purpose of this English-language manual is to provide detailed guidance for the maintenance, repair, and servicing of your Mercury Marine outboard. It includes essential information on engine specifications, troubleshooting common issues, performing routine maintenance tasks such as fluid changes and spark plug service, and understanding the trim and tilt system. By following the procedures outlined within, owners, mechanics, and technicians can effectively maintain the performance, longevity, and safety of their Mariner Outboard XR6, ensuring it operates at peak efficiency for years to come.