How many rpms should a 50 hp Yamaha 4 stroke turn?

A 50 hp Yamaha 4-stroke outboard motor typically operates best at a wide-open throttle (WOT) range of approximately 5,000 to 6,000 RPMs. For optimal performance and efficiency, it's important to ensure that the propeller is properly matched to the boat and load, as this can affect the engine's RPMs. Always consult the owner's manual for specific recommendations based on your model and usage conditions.