This comprehensive workshop service repair manual provides in-depth technical information for the Mercury Mariner 225 and 250 HP EFI Outboard motors. It includes detailed instructions and diagrams covering all aspects of service, maintenance, and troubleshooting. The manual covers engine systems such as fuel injection, ignition, cooling, lubrication, and electrical systems. You'll find step-by-step procedures for performing routine maintenance tasks, diagnosing and resolving common problems, and even complete engine rebuilds. Whether you are a professional mechanic or a DIY enthusiast, this manual is an essential tool for ensuring the optimal performance and longevity of your Mercury Mariner outboard motor.

The Mercury Mariner 225/250 HP EFI is a powerful and reliable outboard motor designed for a variety of marine applications. This two-stroke engine, boasting either 225 or 250 horsepower, delivers impressive performance and efficiency. The EFI (Electronic Fuel Injection) system ensures precise fuel delivery, contributing to enhanced fuel economy and smoother operation. This outboard motor's robust construction features a durable and corrosion-resistant aluminum alloy, making it suitable for both freshwater and saltwater environments. Its advanced engineering incorporates a multi-cylinder design, providing smooth power delivery and reduced vibration. Equipped with a counter-rotating propeller, the Mariner 225/250 HP EFI reduces torque steer, delivering a more controlled and predictable boating experience. The Mercury Mariner 225/250 HP EFI is a renowned choice for boaters seeking a reliable and powerful engine. It is notable for its smooth operation, enhanced fuel efficiency, and user-friendly features. The motor's versatility makes it suitable for a wide range of applications, from fishing and recreational boating to watersports and commercial use. Its robust construction and advanced engineering guarantee durability and longevity. The Mercury Mariner 225/250 HP EFI is a testament to Mercury Marine's commitment to providing high-performance and reliable outboard motors for an enjoyable and safe boating experience.