PerryF,
It is probably more than sufficient for your model boat. Although if your not strapped for cash I would recommend a minnkota terrova 12 volt with 56# thrust with the Ipilot. I have an older bass tracker pro crappie, about the same size of your boat. I saved my money and bought that model.... best thing I ever did. So answer to your question, yes that will be good for trolling and casting on your size boat, but if you ever upgrade you cant ever go wrong with the minn kota I pilot..