Jul 202010
 
Understanding Boat Propeller Assemblies (Part 2)

« Part 1 Spacer Like the thrust washer, the spacer assists alignment of the prop to the shaft when the inner hub is unable to hold its shape, only this time at the aft end of the prop. The spacer bears reverse thrust loads and prevents the inner hub from moving aft, with its large […]

Jul 202010
 
Understanding Boat Propeller Assemblies (Part 1)

On the Propshaft A typical recreational boating propeller is mounted on a splined propshaft with a thrust washer, spacer, washer and nut, with some provision to keep the nut from turning loose, such as tabs on the washer or an additional cotter pin. There are exceptions, like the shear pin systems that were once widespread, […]

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