I believe it would be about right on the 55lb for that size boat. I have an 80 lb on my 198 DLV with T-tops and a lot of extra stuff its pretty heavy and T-tops increase wind load so believe me that matters. Without a top though 55lb will be fine. Just make sure its long enough. Nothing worse than buying a short trolling motor.
2012 DLV 198 Carolina Skiff
Humingbird 998 Side scan and GPS
GPS trolling motor
My Cherokee indian name is asuvsgi nahna adadudi or Fishes on Credit