Trolling motor

[fireplug]

I have an 18' Starcraft closed bow that is used for everything from tubing to trolling (starting this year ).

Has a 120 hp Mercruiser I/O in it, and I am going to get a smaller motor for trolling. My question is: Do you guys think a 55 lb. electric trolling motor ( transom mounted ) will have enough @$$ to push me along at trolling speeds, or should I buy a small (7.5 - 9.9 hp ) gas motor?

Thanks in advance.

[Landing Craft]

Gas, with an alternator to keep your batteries charged. FF, GPS, Radio, ... all take electrons.