This manual covers the Yamaha 225D outboard motor, designed for marine propulsion. Engineered for reliability and performance, this powerful 225 horsepower unit is built to handle demanding marine environments. Its robust construction and advanced technology ensure consistent operation, making it a dependable choice for a wide range of boating applications. This comprehensive guide is applicable to all models, engines, trims, and transmissions within the 225D series. The purpose of this Service Repair Workshop Manual is to provide detailed instructions for the maintenance, service, and troubleshooting of your Yamaha 225D outboard motor. It is intended for both do-it-yourself enthusiasts and experienced mechanics. Inside, you will find step-by-step procedures, highly detailed exploded diagrams, and top-quality illustrations to facilitate complete disassembly and reassembly. This manual is your essential resource for keeping your outboard motor in optimal condition.