I have a star craft that I thought was leaking. It was my bulge pump. I had a hose on it extending into the water, when I turned it on it would pump all the water out of the boat but it would also prime the system so when i turned it off it would syphon water out of the lake through the pump. It was slow but it would be about 5 gallons in an hour or so. Took me 3 trips to figure out where it was coming from. I cut the bulge exit line off above the water line and haven’t had any issues since. Sent from my iPhone using Lake Ontario United mobile app