The Mercury 250 OptiMax Jet Drive, introduced in 2002, is a powerful V6, 2.5-liter (153 cubic inch) Direct Fuel Injection (DFI) two-stroke outboard engine. Engineered for robust performance and reliability, this OptiMax series engine features an alternator charging system, CDI ignition with spark advance, and an automatic oil injection system. Its jet drive transmission ensures efficient operation in various water conditions, making it a versatile choice for demanding marine applications. The engine's design incorporates a 4-bolt main bearing cap for enhanced durability.

This comprehensive Service/Repair Manual in English provides detailed information for the Mercury 250 OptiMax Jet Drive, covering model years starting from 2002 and serial numbers beginning with 0E407100. It includes essential sections on general specifications, maintenance procedures, troubleshooting, electrical systems, ignition, charging and starting, timing, fuel system, DFI, oil injection, emissions, powerhead, cooling, and the pump unit. Color wiring schematics are also provided to assist in diagnostics and repairs, empowering owners, mechanics, and technicians to maintain and service this high-performance marine engine effectively.