I've read many of the forum posts regarding self bailers on our boats... from what I can tell, the descriptions don't match my boat. I have a 1977 DSII. On the floor (deck) - at the rear of the cockpit is a hex shaped "rubber" thing with an attached plug. It is attached to what appears to be a selfbailing drain under the boat on the hull - due to the shape of drain, I would expect it to have a venturi effect and suck the water out. What I don't see is any ball to close the drain when the boat is not moving, nor do i see a "cage" for a ball. Can someone provide a photo... advice... anything thing to help me understand what type of bailer I have and what, if anything, is missing.
TIA,
Wayne