This manual covers the Mercury Mariner OptiMax outboard engines, specifically models from 2000 and later featuring OptiMax Direct Fuel Injection technology. These engines are engineered for reliable performance and offer advanced fuel injection systems for efficiency. With power options of 200 HP and 225 HP, they are designed for demanding marine applications. The inclusion of oil injection and water-cooled systems further contributes to their robust design and operational longevity. The purpose of this comprehensive service repair manual is to provide detailed guidance for the maintenance, diagnosis, repair, and rebuilding of your Mercury Mariner OptiMax outboard. It includes essential technical specifications, preventative maintenance schedules, and step-by-step procedures supported by high-quality, zoomable illustrations and exploded views. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their engine.