This repair manual covers the Mercury 250 OptiMax Sport Jet Drive marine propulsion system, manufactured for the model years 2002 through 2004. Engineered with advanced OptiMax 2-stroke direct injection technology, this system delivers a robust 250 horsepower, making it ideal for demanding marine applications. The Sport Jet Drive configuration offers exceptional maneuverability and performance, reflecting Mercury's commitment to reliability and innovation in marine power. This manual is designed to provide comprehensive information for all versions of the 2002, 2003, and 2004 Mercury 250 OptiMax Jet-Drives. The purpose of this manual is to serve as an authoritative guide for maintaining and repairing your Mercury marine drive system. It encompasses a wide range of essential topics, including routine maintenance, engine and drive system procedures, fuel and cooling systems, electrical diagnostics, and advanced troubleshooting techniques. This detailed resource is invaluable for owners, technicians, and mechanics seeking to ensure the optimal performance and longevity of their Mercury 250 OptiMax Sport Jet Drive, covering everything from basic service to complex repairs.