This service repair workshop manual covers Yamaha Outboard models 60C, 70C, and 90C manufactured from 2003 onwards. These engines are known for their robust engineering and reliable performance, designed to meet the demands of various marine applications. This manual specifically addresses the 60C, 70C, and 90C series, providing in-depth information to ensure optimal operation and longevity of your Yamaha outboard. The purpose of this manual is to provide comprehensive guidance for maintenance, repair, and troubleshooting of your Yamaha outboard. It details all major repair topics, including engine systems, lower unit service, electrical components, and fuel systems. With high-quality pictures and diagrams, this manual is an essential resource for owners, mechanics, and technicians seeking to perform routine maintenance, diagnose issues, and complete repairs accurately and efficiently.