This manual covers the Mercury Marine 250 Optimax Jet Drive outboard engine, manufactured from 2002 onwards. As part of the Optimax Jet Drive Series, this direct injection, 2-stroke, water-cooled engine delivers 250 horsepower. Its robust engineering is designed for reliability and performance in demanding marine environments. The integrated jet drive transmission provides efficient propulsion, making it suitable for a variety of watercraft and applications where a propeller may not be ideal. This comprehensive Service Repair Workshop Manual in English provides detailed information for maintaining and repairing your Mercury Marine 250 Optimax Jet Drive. It includes step-by-step instructions for regular maintenance, tune-ups, fluid changes, and A-Z repairs. Specific sections cover fuel and ignition systems, lower unit, tilt trim, gear case, rewind starter, and jet drive components. With numerous high-quality pictures, diagrams, included part numbers, and recommended tools and techniques, this manual is an essential resource for owners, mechanics, and technicians to ensure optimal performance and longevity of the engine.