The Mercury OptiMax Jet Drive, available from 2002 onwards, represents a powerful 250 Hp Direct Fuel Injection (DFI) Outboard engine designed for demanding marine applications. Engineered with advanced fuel injection, oil injection, and robust ignition, charging, and cooling systems, this engine is built for reliability and performance. Its sophisticated design ensures efficient operation and a superior boating experience, making it a premier choice for those seeking dependable power on the water. This factory repair manual provides comprehensive guidance for the maintenance and repair of your Mercury OptiMax Jet Drive. It covers essential procedures including lubrication, tune-ups, cleaning, inspection, and replacement of components. Detailed instructions for disassembly, assembly, testing, and installation of all engine parts, including the jet drive and pump unit, are included. Furthermore, the manual addresses emissions control and offers troubleshooting steps to ensure your engine operates at peak performance and efficiency.