This manual covers the Yamaha F100TXRX Outboard, a 1999 model year four-stroke engine designed for marine applications. This water-cooled engine features a 1596 cc displacement, producing 100 horsepower, and is configured with four cylinders. Its robust engineering and reliable performance make it a suitable choice for various boating needs. The engine utilizes a CDI ignition system and a gearcase transmission with a 2.33:1 gear ratio, ensuring efficient power delivery. This comprehensive Service Repair Maintenance Manual in English provides detailed guidance for maintaining and repairing your Yamaha F100TXRX Outboard. It includes step-by-step procedures, exploded diagrams, and essential technical specifications covering disassembly, repair, assembly, and inspection. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their engine. Refer to this guide for critical information on lubrication, fuel systems, and cooling system maintenance.