The Mercury Mariner 250 HP EFI Outboard represents a powerful V6 engine designed for demanding marine applications. Its 3.0L displacement and Electronic Fuel Injection (EFI) system deliver robust performance and efficiency, making it suitable for a wide range of boating activities. Engineered for reliability and durability, this outboard motor is built to provide consistent power and smooth operation, ensuring a superior experience on the water. This Factory Service Repair Manual provides comprehensive guidance for the maintenance and repair of your Mercury Mariner 250 HP EFI Outboard. It covers essential procedures, technical specifications, and troubleshooting steps necessary to keep your engine operating at peak performance. Whether you are performing routine maintenance, addressing a specific issue, or conducting in-depth repairs, this manual serves as an indispensable resource for owners and technicians alike, ensuring the longevity and optimal function of your marine propulsion system.