This workshop service repair manual covers Mercury Mercruiser 350 CID engines manufactured between 1998 and 2001. These V8 engines, with a displacement of 5.7 liters (350 cubic inches), are known for their robust engineering and reliable performance, typically producing between 260 and 300 horsepower. Designed for marine applications, these engines often feature fuel injection and can be configured with either raw water or closed cooling systems, paired with sterndrive or inboard transmissions. This manual provides comprehensive information to ensure the longevity and optimal operation of your Mercury Mercruiser engine. The purpose of this manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of your Mercury Mercruiser 350 CID engine. It encompasses a wide range of topics, including engine overhaul procedures, diagnostic techniques, electrical and fuel system servicing, cooling and lubrication system maintenance, ignition system details, exhaust system information, and recommended maintenance schedules. By following the instructions and specifications within this document, owners, mechanics, and technicians can effectively maintain and repair these engines, ensuring continued performance and reliability.