I had a 55 terrova but on the TN river when they are pulling it wasn't quite enough. I now have a 80 and am pulling and pushing crankbaits and it is working fine. I would go with the larger motor. I have been pulling at 1.7 mph for 5 or 6 hours and the indicator lights are still at 3/4 charge. My boat is a tracker V18 all-fish
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