This Factory Service Repair Manual covers Mercury Mercruiser engines with the 305 CID (5.0 L) V8 engine, produced between 1998 and 2001. These internal combustion, water-cooled gasoline engines feature a cast iron block and heads, and typically utilize a carburetor fuel delivery system. Engineered for reliability and performance in marine applications, these engines are known for their robust construction and are commonly paired with Mercruiser Alpha One or Bravo One stern drive units. This comprehensive manual provides essential information for owners, mechanics, and technicians. It details routine maintenance procedures, including fluid capacities and recommended service intervals for oil changes, spark plugs, and fuel filters. The manual also offers in-depth troubleshooting guides for common issues such as ignition system problems and carburetor service, along with routine tasks like water pump replacement. Wiring diagrams are included to assist with electrical system diagnostics and repairs, ensuring the longevity and optimal performance of your Mercruiser engine.