The Mercury Mariner 200/225 HP DFI Optimax represents a powerful and reliable outboard motor designed for demanding marine applications. Engineered with Direct Fuel Injection (DFI) technology, these models deliver exceptional performance and efficiency across their 200 to 225 horsepower range. This series is built for durability and consistent operation, making it a trusted choice for a variety of watercraft. This Service Repair Manual provides comprehensive guidance for the Mercury Mariner 200/225 HP DFI Optimax models. It covers essential maintenance procedures, detailed troubleshooting steps, and critical technical specifications necessary for proper upkeep and repair. The manual is an indispensable resource for owners, technicians, and mechanics, ensuring the longevity and optimal performance of the outboard motor.