Thanks for responding, but this old smokercraft pontoon has them on the rear bottom of each log and it seems the logs are filled with StyrofoamI have a 1990 20’ Smokercraft pontoon boat, need to know what size drain plugs it should have in it.
Yes but they dont seem to fit properly, I was going to just silicone them in but figured I would try finding the correct size first, but have not found anything regarding the plug size. But thank you for your help.Don't you currently have plugs? If they are threaded, head to any home improvement store and pick up plastic or brass plugs to match. If they are rubber expansion plugs, any store that sells marine stuff will have them. They are adjustable for size.