Approx cost and choice for i /O

[dginge]

My Yanmar 6LP 250 has a max rpm of 3800. I cruise at 3050ish....32.5 mph to be most efficient. With the bimini top up and plenty of drag I have seen 42 mph. I bet if I tried hard I could get 45 mph. I get 3.8 mpg too. 76 gallons of diesel. Bravo 3 drive with duo. The guys down in mastry told me the replacement engine is well over 40 now for that engine. Uhhhhhhhhh