Re: replace zinc bolt heads
Yes they are the thru bolts. The nuts are nylock nuts and probably rusty. They do not come loose, even under very severe use or vibration.<br />What may be happening if the bolt is loose, is the transom is soft and causing the bolt to be loose.<br />This is not a good sign, and may indicate dry rot in the transom. Not uncommon on older boats, especially in fresh water.<br />Tap around lightly with a very small hammer on the transom. Good solid wood underneath the glass will be a sharp "tap" dry rot will be a dull "thud" sound. If in doubt, have it checked by a pro. My transom is only 8 months old, in a 70's boat, so trust me, I know the feeling.
