This manual covers the 1989 Yamaha 150ETXF Outboard, a robust and reliable outboard motor designed for a variety of marine applications. Engineered for performance and durability, this model represents Yamaha's commitment to quality marine propulsion. Its water-cooled system and CDI ignition ensure efficient operation, while the carbureted fuel delivery system provides consistent power. The propeller drive system, coupled with its 150 horsepower output, makes it suitable for demanding tasks on the water. This comprehensive Service Repair Maintenance booklet is designed to assist owners and technicians in understanding, maintaining, and repairing the Yamaha 150ETXF Outboard. It details step-by-step procedures, includes exploded diagrams for clarity, and is fully bookmarked for easy navigation. The manual covers essential maintenance, troubleshooting, and technical specifications, ensuring the longevity and optimal performance of your marine engine. Adhering to the recommended lubrication and service intervals, such as using Yamalube or equivalent 2-stroke outboard oil, is crucial for sustained reliability.