This manual covers the Yamaha F100TXRX, a 100 horsepower four-stroke outboard motor designed for marine propulsion. Manufactured in 1999, this gasoline-powered unit represents a commitment to engineering quality and reliability, offering robust performance for a variety of maritime applications. Its design prioritizes efficient operation and durability, making it a dependable choice for boat owners and operators. The purpose of this English-language Factory Service Repair Maintenance Manual is to provide comprehensive guidance for the upkeep and repair of your Yamaha F100TXRX outboard motor. It includes detailed information on General Information, Fuel System, Power Unit, Lower Unit, Bracket Unit, Electrical System, Specifications, and Troubleshooting. With step-by-step instructions, detailed wiring diagrams, illustrations, photos, and exploded views, this manual equips owners, mechanics, and technicians with the necessary knowledge to perform periodic inspections, adjustments, and repairs, ensuring the continued optimal performance and longevity of the marine propulsion unit.