How fast do you want to troll? I have a Minn Kota 30lb on my 15' Alaskan,and it moves my boat along very well. Your boat is wider than mine,but I think a 55lb should just about put your boat on plane. laugh It may be that the old motor you have now isn't as efficient as the new motors. I had a mid-eighties 33lb shakespeare,and it only ran for a few hrs,before killing the battery. I can troll for 6-8 hrs with the same battery and the new motor. Maybe a new motor of similar size will help out?
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- the sun and the sand and a drink in my hand,with no bottom...no shoes,no shirts,no problems.

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