This manual covers Mercury OptiMax DFI outboard engines manufactured from 2000 onwards, specifically models with serial number prefixes starting with OG960500. These Direct Fuel Injection (DFI) outboards are engineered for reliability and performance, available in 200 HP and 225 HP configurations. The OptiMax series represents advanced marine propulsion, featuring robust construction and efficient fuel delivery systems designed to meet the demands of various watercraft applications. The Mercury OptiMax Repair Service Manual provides comprehensive guidance for maintenance, troubleshooting, and repair. It includes detailed procedures for lubrication, tune-ups, cleaning, inspection, and replacement of components. Technical specifications, wiring diagrams, and information on the ignition, charging, and starting systems are also covered. This manual is an essential resource for owners, mechanics, and technicians to ensure the optimal performance and longevity of their Mercury OptiMax outboard engines.