This service repair manual covers Mercury Optimax outboard engines, including 200 and 225 horsepower variants, manufactured from the year 2000 onwards, identified by serial number OG960500 and above. These engines feature advanced Direct Fuel Injection technology, ensuring efficient performance and reliability. Designed for demanding marine applications, the Optimax series is engineered for durability and power, making it a trusted choice for boaters. This comprehensive manual provides detailed information essential for the maintenance, repair, and troubleshooting of your Mercury Optimax engine. It includes in-depth sections on general information, installation, electrical systems, fuel and oil injection systems, powerhead, cooling, mid-section, and gear housing components. With clear instructions and color diagrams, this manual serves as an indispensable resource for owners and technicians alike to ensure optimal engine performance and longevity.