This manual covers the Mercury Mercruiser 5.7L MPI, an internal combustion V8 engine designed for marine applications. Known for its robust engineering and reliability, this engine family typically features a 5.7-liter (350 cubic inch) displacement and utilizes Multi-Point Fuel Injection (MPI) for efficient performance. Its water-cooled system and electronic ignition contribute to its dependable operation, commonly paired with sterndrive transmissions and delivering an estimated power output ranging from 260 to over 300 horsepower depending on the specific configuration. The purpose of this comprehensive Service and Repair manual is to provide detailed information for the maintenance and repair of your Mercury Mercruiser 5.7L MPI engine. It includes essential procedures for routine maintenance, troubleshooting common issues, and understanding technical specifications. This guide is an invaluable resource for owners, mechanics, and technicians, ensuring the longevity and optimal performance of the engine through accurate and clear instructions in English.