M_Boats: more on electric drive on M17

today I tried an new variable speed electric trolling motor on a M17, on still lake, with no air, one person. I got the gauge to reach almost two knots, its a hang over the side wand type. The meter said it was pulling 47 amps and at full open it lasted almost two hours. It was very sensitive to position of the helmsman. approximately 745 watts per one HP, that comes to only 0.86 HP, two knots seem too high for so small a motor. A ready to sail M17 I think weighs in at 2200 lbs plus one person.