This manual covers the Yamaha F80TXRX outboard motor, manufactured in 1999. Designed for marine propulsion, this 4-stroke, 80 horsepower gasoline engine exemplifies Yamaha's commitment to engineering quality and reliability. Its robust construction and efficient performance make it a dependable choice for a variety of boating applications, offering a powerful and consistent experience on the water. The purpose of this English-language Factory Service Repair Maintenance Manual is to provide comprehensive guidance for the upkeep and repair of your Yamaha F80TXRX. It details essential procedures, including general information, periodic inspections and adjustments, fuel system maintenance, power unit and lower unit servicing, electrical system diagnostics, and troubleshooting. With step-by-step instructions, accompanied by illustrations, photos, and exploded views, this manual is an indispensable resource for owners, mechanics, and technicians to ensure optimal performance and longevity of the outboard motor.