4-strokes
I've got two Honda 4-strokes and both run great, quiet, and super on fuel economy (which is getting more important every day). You can determine the weight of the engines off the web sites and put the equivalent extra weight near the transom to see how your boat would sit in the water with the new motor. The extra weight in a 25-30 hp range shouldn't have much effect on the transom as long as your not over the HP limit.
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