Re: What size o/b for CAL 27?
My boat is a couple of feet shorter and an ancient, but reliable 9.9 Evinrude is normally plenty. Only time I have felt the desire for more power was motoring up stream on a couple of river anchorages. Unless you have fast running tides or strong currents to buck, 15 HP should be adequate. Besides, once you get to "hull speed" it takes a bunch more motor to gain anything.