I was just given a old 70's something renken with a 70hp evinrude the guy just wanted out of his yard it hasn't been run in about 4 years or so. I stripped all the carpet and interior out the floor has no soft spot but there was some water in the hull( i guess from rain) just sitting there. So my question is should I be worried about damage under the floor I would hate to rip up a solid floor for no reason.