-1979 Aristo Craft Nineteen
-Mercruiser 470 4-cylinder 170 HP.
-1.84 ratio outdrive.
-23 pitch prop
-Loadout: 1/4 tank fuel, one battery, some inflatables, one 200 lb man and one 40 lb dog.
Almost a direct ratio on rpm vs speed. 2000 rpm is 17 mph, 2500 rpm is 23 mph, 3000 rpm is 31 mph, 3500...