Hi Sean: No experience with Lehmans but.... A couple of things. Your website says she's 42" long, same as your post here. You might want to fix that. <G>. $117,000 for a 42" long boat is high. Your website says 150 hours since engine top-end overhaul. Are you saying that this condensation damage happened within the last 150 hours of use? That sounds suspicious to me? I assume your mechanic did not remove the cylinder head. He probably just did a compression test and found one cylinder weak? Is this right. Did he borescope or otherwise look inside? You said he could hear something? The thing is to go from a weak cylinder compression to a complete, major overhaul is a pretty big leap. Your engine has 5500 hours so she is getting long in the tooth but if she was maintained well, a few thousand more should be possible. It's doubtful that this condensation did much more than corrode the valve seats in one cylinder. How much can it cost to just pull the head and look inside. Then you will know for sure what you face and then you can decide. Seems to me a reconditioned cylinder head would fix any such damage as you describe for about 1/10th your estimated figures. Joe Engel Portland, OR