09-29-2013, 06:14 PM
There is probably a mushroom thru-hull under that strainer and a sea cock on the mushroom threaded shaft inside the hull. Some times its a one piece thru-hull and strainer. Oysters and barnacles love to live in there. Its a tough job to clean them out when the boat is out of the water but I have done it. You must break the pieces small enough to fit through the slots. Long screwdrivers seemed to work best. If it was installed with 5200 it will be difficult to remove for cleaning. I have never tried an acid flush. Capt. George
