As for the lower salmon, you can not back enough battery power. Each battery will weight 50 lbs and the motor will 30lbs. You need at least a 40+ pound electric motor in the wind and that will drain your battery. Top speed of all electric motors is about 5 mph. Check minn kota. My 6hp outboard weights 61 lbs and pushes way harder and consumes less that 2 gallons of gas.
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