Good luck with your boat shopping...it's great to have choices...
Experience with
Yanmar 2gm 18 hp. ...delivery on friends Hunter 33 early last May from Long Island Sound to southern
Maine... after waiting out howling north
wind for 3 days in Pt Judith pond made our way into moderate north winds into
Buzzards Bay under
motor alone, boat pounded up bay all day averaging about 5 knots and then continued into canal and up to Kittery, Me. (in light wind) through the night approx. 30 hours straight.
I am a fan of Yanmar as I have a 3gm in my 30tfer... But was very impressed with the little 2 cyl 18 hp it did not miss a beat and very good fuel effiecency.
Of course
motor only as good as properly sized/pitched prop.