This manual covers the Iveco C13 marine diesel engines, specifically the M33 and M50 generations, manufactured in 2007. These 13.0-liter engines are engineered for marine applications and feature an EDC (Electronically Controlled Unit Injector) fuel system with EUI components, a gear pump lubrication system, and both closed-loop and open-loop cooling systems. They are designed for reliability and performance in demanding maritime environments. This comprehensive technical and repair manual provides essential information for maintaining and servicing your Iveco C13 marine diesel engine. It details engine architecture, electrical equipment, system functions, and required tools. Furthermore, it includes crucial sections on engine overhaul procedures, safety regulations, and servicing operations for installed engines, ensuring that owners and technicians have the knowledge to keep the engine operating at peak efficiency.