bought a new to me nitro 901....test drive ran great no water leaks but the guy still had his electronics on it. We worked out a deal and he removed the transom transducers plural yes. I dont why. But I took it out and the auto bilge started kicking on every 30 mins...could the holes be letting water in now? I checked during the test drive and everything was water tight. If this is the problem, best way to fix them?