Re: correct prop size for 1968 40 hp evinrude
The correct prop size would depend on the boat and usual activities.In 60 the motor came with a 10 3/8 X 14 At 350 lbs the 14 may be a good start.A 14 is pretty far up the chart intended for relatively light boat and load.Wouldn't hurt to tell us the size and description.Size is usually near the base of the blades.