The Mercury MerCruiser 5.7L MPI is a robust V8 internal combustion engine designed for marine applications. This naturally aspirated, water-cooled gasoline engine features multi-point fuel injection and electronic ignition, delivering approximately 260-300 horsepower and 330-350 ft-lbs of torque. Its 5.7-liter displacement provides ample power for a variety of watercraft, coupled with a stern drive or inboard-outboard transmission system. Engineered for reliability and performance, this engine is a strong choice for boaters seeking dependable power and efficiency on the water. This Service and Repair Manual provides comprehensive guidance for the Mercury MerCruiser 5.7L MPI. It covers essential maintenance procedures, troubleshooting techniques, detailed technical specifications, and critical safety guidelines. The manual is intended to assist owners, mechanics, and technicians in understanding, maintaining, and repairing the engine and its associated systems. By following the procedures outlined within, users can ensure optimal performance, longevity, and safe operation of their Mercury MerCruiser 5.7L MPI engine.