This repair manual covers Mercury Mercruiser GM V8 305 CID 5.0L and 350 CID 5.7L marine engines manufactured between 1998 and 2006. These V8 gasoline engines are designed for marine propulsion, offering robust performance and reliability for watercraft. The engineering quality inherent in these models ensures dependable operation for a wide range of boating applications. This comprehensive repair manual provides essential information for maintaining and servicing your Mercury Mercruiser marine engine. It includes detailed procedures for routine maintenance, engine removal and installation, and advanced troubleshooting. Coverage extends to critical systems such as fuel, lubrication, cooling, intake, exhaust, and electrical systems. Additionally, the manual offers service and repair information, along with parts lookup, to assist owners and technicians in keeping their engines in optimal condition.