The second one from left to right is the only one I'm currently plugging. Is it alright not to close the other three?
The boat hull is MAKO 86 23 feet . The boat is not currently sinking, but every 10 minutes I can hear the bilge pump pumping water (Like a jar of water) outside the boat. This is all new to me. I only know is that the second hole must be plugged before going to the water, but what are the other three for?
It is an outboard , center console and it also has a living well. I never use the living well. It always empty. The one I plugged each time I go into the water is the bilge drain. If not plugged the boat would sink. The other three I believe are called thru hull fittings. The other three I don’t understand the usage of them, I'm also suspecting that water is coming through them into the boat causing the bilge pump work every few minutes
