Johnson/Evinrude-OMC Thrust Washer - Drive Shaft - 45-60 HP - 2 Cyl, 3 Cyl (OEM317230)

Thrust washers are used as a bearing surface for rotary applications. They are usually made of steel, bronze, plastic, or other materials with low friction coefficients. Thrust washers, sometimes called rotary thrust washers, are washers designed to prevent movement along the axis of a shaft.

A thrust washer is a flat bearing that sandwiches in between a rotating component and a stationary component and acts to keep the rotating component in place by giving it something to brush up against if it starts to move sideways.