I have a 2002 [from new ]
mercury bigfoot 40 hp four stroke that has only done 200 hrs, when i cross our local gulf here in Adelaide from my moorings at garden island i can make a beacon which is called Middle Spit beacon of off a small town called Pt Vincent which is approximately 30+ nantical miles away on one tote tank [22litres approx] at 3500
rpm which depending on conditions gives us 6 knots since my trimiran is 36ft long and weights 5.5 tn i consider this excellent value having had 2strokes in the past there is no-way that they could compare with this type of economy and lets not get into the sound difference ....... but thats another can of worms to open isint it !!!!!!!!!!!!!
cheers andy