This manual covers the Mercury Mercruiser 350 CID engine, produced between 1998 and 2001. This V8 engine, based on the GM Small Block architecture, offers 350 cubic inches (5.7 liters) of displacement and features Multi-Point Fuel Injection and Electronic Ignition for reliable performance. Engineered for marine applications, these engines are known for their robust construction and dependable operation, making them a popular choice for a variety of watercraft. The specific generation detailed in this guide is tailored for models manufactured within the 1998-2001 production years. The purpose of this English-language Factory Service Repair Manual is to provide comprehensive guidance for the maintenance and repair of the Mercury Mercruiser 350 CID engine. It details essential procedures, technical specifications, and troubleshooting steps necessary to keep the engine operating at peak efficiency. This manual is an indispensable resource for owners, mechanics, and technicians, offering clear instructions on everything from routine fluid changes and component inspections to more complex repair tasks, ensuring the longevity and performance of your marine propulsion system.