This comprehensive Mercury Outboard 225 4-stroke EFI Service Repair Manual is your essential guide for maintaining and repairing your outboard motor. Covering models starting from the 2003 model year with serial numbers 0T653945 and beyond, this manual offers detailed instructions and high-quality diagrams, making it an invaluable resource for both seasoned mechanics and DIY enthusiasts. The manual is structured for easy navigation and provides in-depth coverage of all major components. You will find detailed information on essential aspects like specifications, maintenance procedures, and general information, including outboard motor installation. The Electrical section delves into the intricacies of the ignition, charging and starting systems, and includes guidance on timing, synchronizing and adjusting. The Electronic Fuel Injection section covers the system's theory of operation, providing comprehensive diagnostics and troubleshooting techniques alongside detailed service procedures. This section also includes information on emissions compliance. The Powerhead section, covers the cylinder head, cylinder block/crankcase, and lubrication system. Moving to the Mid Section, the manual provides guidance on clamp/swivel brackets and drive shaft housing, power trim, and lower unit assembly. The manual also includes dedicated sections on the standard rotation gear housing and counter rotation gear housing, providing clear instructions for maintenance and repair. The Attachments/Control Linkage section offers thorough explanations and diagrams for the throttle/shift linkage. Finally, the manual features color diagrams to aid in visual understanding and aid in identifying components. With clear step-by-step instructions and detailed diagrams, this manual empowers you to confidently perform repairs, saving you time and money.

The Mercury Outboard 225 4-stroke EFI is a powerful and reliable outboard motor designed for serious boating enthusiasts. This engine boasts a 225 horsepower output, generated by a 3.0-liter, four-cylinder, four-stroke engine featuring electronic fuel injection (EFI). The EFI system provides precise fuel metering and optimal combustion, ensuring smooth operation, superior fuel efficiency, and reduced emissions. The 225 FourStroke is renowned for its smooth, quiet operation, making it ideal for cruising, fishing, and watersports. The Mercury 225 FourStroke is built with durability and longevity in mind. Featuring a robust design and high-quality materials, this engine is capable of handling demanding conditions and providing years of reliable service. The engine incorporates a variety of advanced features, including a digital throttle and shift (DTS) system for precise control, SmartCraft integration for monitoring and diagnostics, and a reliable electric start system. The 225 FourStroke is also equipped with a corrosion-resistant finish and a robust powerhead design, ensuring optimal performance and extended lifespan even in saltwater environments. Whether cruising the open water, chasing fish, or pulling skiers, the Mercury 225 FourStroke delivers exceptional performance and reliability, making it a popular choice for a wide range of boating needs.