This Service Repair Workshop Manual covers the Mercury MerCruiser D1.7L DTI marine engine, identified by engine code #29 and serial numbers OM055001 and above. This 1.7-liter turbocharged and intercooled diesel engine is engineered for robust performance and reliability in sterndrive marine applications. Its advanced design ensures efficient operation and durability, making it a preferred choice for demanding maritime use. This comprehensive manual provides essential information for owners, professional technicians, mechanics, and workshops. It details general information, routine maintenance procedures, troubleshooting guidance, and step-by-step instructions for removal, installation, rebuilding, and diagnostics. Included are clear, zoomable illustrations, wiring diagrams, exploded views, and component breakdowns, offering complete support for maintaining and repairing the D1.7L DTI engine.