This Service Repair Workshop Guide provides comprehensive information for the Mercury Mercruiser D1.7L DTI engine, serial numbers OM055001 and above. This 1.7-liter direct injection turbo intercooled engine is engineered for reliability and performance in MCM (Sterndrive) models. Key systems covered include the fuel system with its filter, injectors, and injection pump, the closed cooling system, and the intake and exhaust systems featuring an intercooler. The electrical system includes details on the starting, charging, and glow plug systems, along with instrumentation and wiring diagrams, and power steering is also addressed. This manual is designed to assist owners, mechanics, and technicians in maintaining and repairing their Mercury Mercruiser D1.7L DTI engine. It covers essential areas such as general information, preventative maintenance, servicing, repair procedures, diagnosis, troubleshooting, and technical specifications. With clear, step-by-step instructions, zoomable illustrations, exploded views, and component breakdowns, this guide facilitates efficient and accurate work. The manual is presented in English and can be printed or saved without restriction, ensuring accessibility for all users.