This Service Repair Manual covers Mercury MerCruiser GM-V8 engines, specifically the Gen V and Gen VI generations. It addresses engine displacements of 7.4L (454 CID) and 8.2L (502 CID), featuring V-8 configurations and various fuel system types including Carburetor, EFI, EFI/MP, and MPI. The manual details essential components such as the cooling system, exhaust manifolds and elbows, starting, ignition, and charging systems, as well as the Velvet Drive marine transmission and drive components like drives and propeller shafts. This comprehensive manual is designed to assist owners, mechanics, and technicians in maintaining and repairing their Mercury MerCruiser GM-V8 engines. It provides very detailed instructions, high-definition diagrams, and well-structured content with bookmarks for easy navigation. Key areas covered include general information, routine maintenance, troubleshooting, removal and installation procedures, electrical systems (instrumentation, kits, wiring), fuel and engine management, and the power steering system. The manual is presented in English and is ready for printing.