Growing up, my father bought a brand new 1965 Sears 7.5 hp outboard. White Ted Williams model. It had the 1-1/2” long barbed nipple on the side below the power head. A long rubber hose would push onto the nipple. At the other end was a round cast aluminum disc with a screen on one side. The cast piece, which was a little bit bigger than a hockey puck and pretty heavy for the size, sat on the floor of the boat in the bilge. It would act as a bilge pump constantly sucking any water that would get into the boat. It works only when the motor is running. I just remember the thing vibrating on the floor of the aluminum boat making a racket!
