I have a 22 foot crest super fish. ( Heavy) I had a Terrova I Pilot / 55 pound thrust on it for a long time. It worked very well. It will do you fine for trolling and side drifting. I had to up grade due to health issues and I now have the ulterra 36 volt. How far do you have to carry your battery? Could a drop cord reach your dock? Just thinking you could get a small charger or a onboard charger to eliminate carrying batteries. BTW make sure you get a long enough shaft for the TM. You want to be able to see it easily from any distance. Hope you find a solution for everything.