I purchased an additional year of Factory warranty on my boat ENGINE because they (Mercruiser Dealers) refused to fix the problem since the first year of the warranty. MY three year factory warranty is now expired and engine still has the same problem (it pours soot into the lake from the exhaust and also leaves a black waterline on the transom).
I first took the boat to the selling dealer (FoxLakeHarborBayliner). They said nothing was wrong. So then I took it to the nearest dealer (BasaMarine, Bolingbrook, Illinois). After several attempts to fix the problem they said they didn't know what was wrong with it (even though the selling dealer already said nothing was wrong - right).
I called Mercruiser (many times) and they now refuse to talk with me on the phone. I would bet my boat sat at the dealer for over five weeks and still is not repaired. Mercs warranty is not worth the paper it's printed on.