Go for it. I had a 13'6" catboat(sailboat) I used a 17lb thrust electric on it. It would drive that boat(500lbs) plus me around at 3 knots. A 20-30 lb thrust will run a few hours easily on a deep cycle battery. You can install a trolling motor plug on a battery box(removable from the canoe), and simply plug in the electric. It will comfortably move you about a pond or a lake with no trouble and no noise.
Recreational Kayak Paddle
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