The prop shaft or tube fits precisely into the stuffing box so it won't let water into the hull. The stuffing box also lets you remove the shaft or the tube for repair or maintenance. Strut and strut bracket. This device holds the prop and prop shaft at a precise angle and is usually attached to the transom. This part produces thrust by pushing against the water.
Props are available in plastic, aluminum, or copper alloy.
Drive dog and prop nut. These are used to attach the propeller to the prop shaft. The rudder steers the boat left and right. It's usually a flat sheet of brass or aluminum attached to a rudder tiller arm, or it can be made of a wedge-shaped aluminum casting or extrusion. Skegs and turn fins.