I bought a 1988 bass tracker a couple of weeks ago and took it out on the lake and noticed i had to turn the bilge pump on about every 45 mins to a hour and let it run for about 5 mins, got home and looked up underneath it and seen in the very middle of the boat there was what it looked like to be silicone or something all the way down the middle on both sides and it was rottening off and i pushed up on it and i could see dew were water had been there wear it is at any idea on how to fix this problem? this is my first boat and do i need to take all the old off and put something new on? Any advise would help thanks.