The Mercury Marine OptiMax Outboard, produced from 1997 through 2000 and beyond depending on the specific model, represents a line of V-6, 2-cycle direct injection engines. These outboards, available in various horsepower configurations including 115, 135, 150, 175, 200, and 225, are engineered for robust performance and reliability on the water. With displacements ranging from 2508 cc to 3047 cc, the OptiMax series is designed to meet the demands of diverse marine applications, offering advanced fuel injection technology for efficiency and power. This workshop service repair manual provides comprehensive guidance for the maintenance and repair of your Mercury Marine OptiMax Outboard. It covers essential procedures such as disassembly, reassembly, installation, adjustment, and troubleshooting, supported by detailed illustrations, step-by-step instructions, and diagrams. The manual also delves into specific systems including electrical components like the ignition, charging, and starter systems, as well as fuel injection and cooling systems, and reverse operation. Furthermore, it includes information on DDT Functions for OptiMax models software, enabling detailed diagnostics for owners, mechanics, and technicians.