This service repair manual covers Mercury Mercruiser Marine Engines In-Line D-Tronic models from 1993-1997, specifically the 2.8L and 4.2L Diesel variants. These engines represent the first generation of the D-Tronic series, known for their inline diesel configuration and advanced D-Tronic electronic fuel injection system. The manual is designed to provide comprehensive information for these robust marine powerplants, which are engineered for reliability and performance in various marine applications, including stern drive and inboard configurations. This comprehensive 878-page English manual provides detailed instructions, illustrations, photos, and diagrams to assist owners, mechanics, and technicians. It covers essential maintenance procedures, troubleshooting guidance, and technical specifications for the engine's various systems, including fuel delivery, electrical components, intake and exhaust, and power steering. The manual is printable and accessible across multiple devices, ensuring that users have the necessary resources to maintain, diagnose, and repair their Mercury Mercruiser D-Tronic marine engines effectively.