This manual covers the Yamaha 150ETXF outboard motor, produced in 1989. Designed for marine propulsion, this 150 horsepower outboard motor represents a significant advancement in its class. Yamaha is renowned for its commitment to engineering excellence, delivering reliable and high-performance marine solutions. The 150ETXF embodies this dedication, offering robust construction and dependable operation for a wide range of boating applications. The purpose of this comprehensive Service Repair Maintenance Professional Factory Manual is to provide detailed guidance for the upkeep and repair of your Yamaha 150ETXF outboard motor. It includes step-by-step disassembly, assembly, and inspection procedures, often accompanied by exploded diagrams for clarity. This manual is an essential resource for owners, mechanics, and technicians, offering the necessary technical specifications and maintenance information to ensure optimal performance and longevity of the marine propulsion system.