The Mercury Marine 250 Optimax Jet Drive, manufactured from 2002 onwards, represents a powerful and reliable option for marine propulsion. This V6, 3.0-liter (183 cid) 2-stroke direct injection engine delivers 250 horsepower, featuring advanced Electronic Fuel Injection (EFI) and SmartCraft Digital Ignition for optimal performance. Its integrated Jet Drive system offers a unique solution for shallow water operation. Engineered for durability and efficiency, the 250 Optimax Jet Drive is designed to meet the demands of various marine applications. This Workshop Service Repair Manual provides comprehensive guidance for the Mercury Marine 250 Optimax Jet Drive. It covers essential maintenance procedures, including lubrication with Mercury Premium Plus 2-Stroke Outboard Oil and ignition system care with NGK WR6 spark plugs. The manual details troubleshooting steps utilizing SmartCraft Diagnostics and includes technical specifications, safety guidelines, and repair instructions. With clear, step-by-step instructions, illustrations, diagrams, and exploded views, this English-language manual is an indispensable resource for owners, mechanics, and technicians to ensure the continued optimal performance and longevity of their engine.