Looking for the rubber flap that is held in the scupper drain exit for the engine hatch. The rubber piece in mine has dry rotted out, and gone away. Looks to a be apart one should be able to replace, without having to replace the whole thru-hull fitting.. Attached is a picture showing the drain exit. It drains the engine hatch tray. Came off plane a little faster than usual the other day, and water was able to back-wash back up to my cockpit.. Didn't have the carpets down yet, so no huge deal.. Think I found the through hull on the four winns site, but it appears to be discontinued through them, and their part numbers don't jive with anything else online that I could find. There is one screw that holds the rubber flap in, and then it's got a groove in it to allow it to open outward to allow water out, but close back up to keep water coming back in.. Need that rubber part..
