This repair manual covers the Mercury 250 OptiMax Jet-Drive outboard engine models manufactured between 2002 and 2004. Engineered with a 3.0 L V6 2-stroke direct injection system, these engines deliver 250 horsepower, offering robust performance for various marine applications. The Jet-Drive system provides efficient propulsion, making these engines a reliable choice for demanding watercraft. This comprehensive English-language manual provides detailed information essential for maintaining and repairing your Mercury 250 OptiMax Jet-Drive. It includes sections on general information, routine maintenance, engine specifications, fuel and cooling systems, electrical systems, and advanced troubleshooting. The manual is designed to assist owners, technicians, and mechanics in ensuring the optimal performance and longevity of their engine.