This service repair manual covers Mercury MerCruiser GM V8 Marine Engines, specifically the #24 Series, manufactured between 1998 and 2001. These engines are based on the robust GM V8 Small Block architecture and are available in 305 CID (5.0L), 350 CID (5.7L), and 377 CID (6.2L) displacements. They feature V8 configurations, offering both carbureted and Electronic Fuel Injection (EFI) systems, and utilize distributor-based ignition. Cooling systems are designed for both seawater and closed-loop applications. These engines are paired with Sterndrive (MCM) and Inboard (MIE) configurations, supporting transmissions such as Velvet Drive InLine, V-Drive, 5000 Series, and Hurth Models, making them a reliable choice for a variety of marine applications. This comprehensive English-language manual provides essential information for maintaining and repairing your Mercury MerCruiser engine. It details general information, routine maintenance procedures, troubleshooting guides for all major systems including engine, electrical, fuel, cooling, exhaust, and drives, as well as removal and installation instructions. Specific sections cover engine specifications, electrical systems with wiring diagrams, fuel systems including EFI diagnostics, cooling systems, exhaust systems, drives, and power steering. This manual is designed to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of their marine propulsion system.