we have a 33ft.morgan.
we took it out 6 or 7 times no problem.When we headed out this spring leaving ft.pierce to st.louis cranked the diesel at 21rpm. it overheated
to 200,we pulled it back in to changed the impreller,didnt help,checked the
all the things that are on your replys,fortunately a couple that had lived aboard for years hit the nail on the head,it was the heat-exchanger,they
say to look at the exhaust for your sputtering it did, no symptoms an it was the heat exchanger .Wish us luck waiting for Alberto in carrabell