Mercury 500R Hub Kit 1.50″ Prop Shaft 23 Spline 8M0217764

Mercury 500R Hub Kit 1.50″ Prop Shaft 23 Spline 8M0217764

The 8M0217764 also known as Ultralock, is the solid steel hub kit designed for the 1.50” prop shaft featured on all 500R outboards, and is used to adapt propeller families with Flo Torq hubs such as the Ventera and MAX5. This hub kit contains the same jam nut and lock nut components of the 8M0183487 hub kit and also a labyrinth seal ring that slides onto the front of the propeller and is required when mating to the larger 5.9” 500R gear cases.