This manual covers the Mercury Mariner outboard motor, specifically models equipped with a 225 horsepower engine. These gasoline-powered, water-cooled outboard motors are known for their robust engineering and reliable performance, making them a popular choice for a variety of marine applications. The V6 engine configuration and electronic ignition systems contribute to their efficiency and power output. This comprehensive service repair manual in English provides detailed information essential for the maintenance and repair of your Mercury Mariner outboard. It covers critical areas such as lubrication, recommended maintenance schedules for components like spark plugs and water pump impellers, and technical specifications. By following the procedures outlined within, owners and technicians can ensure the longevity, optimal performance, and safe operation of the 225 HP Mariner outboard motor.