Just bought a 95' nitro 180 fs. No stress cracks anywhere looks brand new, has a 115 merc. The motor was loose, when I tightened it up it felt as if the gelcoat outside glass layer was delaminated from the wood. Is this common for older Nitro's and does it mean I have a rotten transom?If so what is a good fix? The boat has less than 200 hours on it. Thanks for any ideas