This Service Repair Manual covers the Yamaha 150C and V150C outboard engines manufactured in 2003. These engines are known for their reliable performance and robust engineering, designed to provide dependable power for a variety of marine applications. The V6, naturally aspirated, water-cooled configuration, delivering 150 HP with a 2.6L displacement, ensures efficient operation and durability on the water. This comprehensive manual provides essential information for the maintenance and repair of your Yamaha outboard. It details routine procedures such as flushing after each use, fuel system purging, and regular inspections of the propeller and power trim/lift systems. While specific intervals for oil changes, spark plug replacement, and fuel filter changes are noted as requiring reference to the manual, the document also includes a troubleshooting section to assist with diagnosing and resolving potential issues.