Etec question?

[Giorgio]

At the end of the season, my friend Lloyd was having problems with his 1987 Wellcraft V20 with a 2008 Evinrude ETEC 200HP, it wouldn't start, then did, wouldn't go over 3,000 rpms. He brought it into the shop and they wanted to know how, at first fresh water got into the head. He told them he didn't know what they was talking about, then he was told it was salt water, so when did the boat sink, well the boat never did sink. After back and forth he was then told, "the motor was seized and Etec has a flaw. Here is what the mechanic said the flaw was, Blow off valve nuts and bolts rust causing it to leak salt water into the engine and the pistons were full of water". The motor is being replace with another 200 HP ETEC, a 2012, so if it is true about that flaw, will this motor have the same defect? Now I have a question, only Rh head/block is being replaced, it has 0 hours on it, but they will still be using his lower unit, could that cause a problem, the lower unit is a 19??. I do not know the year of the lower unit.