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There other day I needed to put a new battery in my boat and when I opened the engine hatch, it made a loud popping noise when it was about half way open. I was able to get the hatch all the way open and I looked but didn't see anything around it was catching on. Since I was inside the boat, I was unable to see the bottom of the hatch from the back the swim platform. It sounded like it might me hitting/rubbing the fiberglass on the upper swim platform. I replaced the battery and put the hatch back down and there was no noise. I thought maybe this was a "one off" thing, so I lifted the hatch again and it made the same noise when it was halfway open. Any suggestions on what might be causing this? Thanks!!