This manual covers the Mercury MerCruiser D1.7L DTI marine engine, specifically for serial numbers 0M055001 and above. The D1.7L DTI is a 1.7-liter Diesel Turbo Intercooled engine engineered for reliable service and repair. Its robust construction and advanced technology ensure optimal performance in marine applications, making it a trusted choice for boat owners and operators. This comprehensive Service Repair Factory Manual provides detailed information essential for maintaining and repairing your Mercury MerCruiser D1.7L DTI engine. It includes procedures for engine removal and installation, as well as in-depth guidance on the electrical, fuel, cooling, intake and exhaust, and power steering systems. The manual is designed to assist owners, mechanics, and technicians in performing all necessary service and repair tasks efficiently and effectively.