This service repair workshop manual covers the Yamaha F100B and F100C outboard engines, produced between 2001 and 2007. These 4-stroke gasoline engines deliver 100 HP and are engineered for reliable performance in various marine applications. This manual provides comprehensive information to ensure the optimal operation and longevity of your Yamaha outboard engine. This manual is designed to be an indispensable resource for owners, mechanics, and technicians. It includes detailed step-by-step instructions, hundreds of pages of content with high-quality photos and diagrams, and highly detailed exploded diagrams. The scope covers all aspects of service, repair, and troubleshooting, enabling users to perform maintenance and repairs with confidence and efficiency.