This manual covers the Yamaha F150A and FL150A outboard motors, featuring an in-line 4-cylinder engine configuration with a displacement of 1832 cc and delivering 150 horsepower. These robust outboard motors are engineered for reliable performance, utilizing Electronic Fuel Injection (EFI) for optimal fuel delivery and a Digital CDI ignition system. Their water-cooled design ensures efficient operation across various conditions, making them suitable for a wide range of marine applications. The Yamaha F150A / FL150A Outboards Factory Service/Repair/Workshop Manual provides comprehensive guidance for maintenance, service, diagnosis, and repair. It details essential procedures, including periodic checks and adjustments, fuel system servicing, power unit and lower unit maintenance, and electrical system troubleshooting. With highly detailed exploded pictures and diagrams, this manual serves as an indispensable resource for owners, mechanics, and technicians to ensure the longevity and optimal performance of their Yamaha outboard motors.