This Yamaha Outboard Motor Service Repair Manual covers a comprehensive range of gasoline-powered outboard motors from 150 to 225 horsepower. Designed for service, repair, maintenance, and troubleshooting, these engines represent Yamaha's commitment to engineering quality and reliability. This manual provides detailed information for all models, engines, trim, and transmission types within the specified horsepower range, ensuring you have the necessary resources to keep your Yamaha outboard running optimally. The purpose of this English-language Factory Service Repair Manual is to provide essential guidance for owners, mechanics, and technicians. It includes comprehensive maintenance coverage with step-by-step instructions, exploded pictures, and diagrams to facilitate accurate repairs. Whether you are performing routine maintenance or addressing complex issues, this manual is an indispensable tool for understanding and servicing your Yamaha outboard motor.