On the bright side, at least you didn't buy twins. Who was your dealer, Lynnehaven? How is the Yammaha working out?
People talk crap about Mercurys I run but I never had any real problems with them like you described.
I have the same engine initially I had 2 powerhead replaced but it was a rigging problem with the fuel supply. After we discovered it the engine has been running flawlessly. I was going to sell it with one more year warranty left however now I am just going to run it until it is not worth fixing. Dread the day I have to hang a 4 stroke on my transom. I have buddies with yamies and suzukies, their complaint is that it takes for ever to get parts. One of my guide friends has been waiting for parts over 30 days. There is only one good motor and that's the one that runs.
Is there a lawsuit being organized? They should not get away with this. I have 4 of them on small tour boats and they are killing my business. I'm already looking for an attorney. Anyone else? We should definitely unite for this to make sure we can hold them accountable.