The Mercury Marine 250 Optimax Jet Drive Engine, part of the Optimax Series, represents a significant advancement in marine propulsion technology for models from 2002 onwards. This powerful 2-stroke direct injection engine delivers 250 horsepower, featuring a 3.0L displacement and a robust water-cooled system. Its integrated jet drive propulsion system is engineered for exceptional performance and maneuverability in various water conditions, embodying Mercury Marine's commitment to reliability and innovative design. This comprehensive Full Service Repair Manual in English provides detailed guidance for maintaining and repairing your Mercury Marine 250 Optimax Jet Drive Engine. It covers essential areas including diagnostic procedures, step-by-step repair instructions with illustrations, and troubleshooting combined with electrical service and wiring diagrams. The manual is designed to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of the engine through clear, actionable information and easy navigation.