The purpose of the prop nuts is to keep the propeller securely fastened to the shaft taper. As long as the engine is running, the propeller will continue to press against the shaft with little strain...
What would make a loose nut desirable? On open water, you don't want your propeller to bob around. Propeller nuts are well-used to hold the propeller against the shaft tape and are available in the...
Like the thrust washer, the prop nut spacer helps align the prop to the shaft when the inner hub loses its form, this time at the aft end of the propeller. With its vast surface area, the spacer...