mercury F 150 is cheaper because has 20% parts/components less than nearest competitor....ha ha
My friend has this mercury F 150 on bombard 7,5 m, he is doing taxi transfers. Engine is old "2 seasons", 700 hrs +, he said min 700 hrs but for sure much more - he don't even know! He did some maintenance, but never in regular intervals!
I asked him how is he satisfied with engine, he said very good. This opinion is enough for me. But maybe his engine is extraordinary and because of this I wanted opinion from other people but as I see nobody has to say any thing against this engine...
When this guy is saying "I did some maintenance" this does not mean he did. Once he was saying he is not satisfied with yamaha f60, on engine is only 400 hrs, consuming oil...bla bla... later on conclusion was he did first oil change on 400 hrs, so he bayed a new engine and first oil change on 400 hrs!