225 on a 20SF (too heavy?)

[BoniB]

Its a boat that I'm thinking about buying and it just happens to have a 225 Evinrude on it. If I were to re-power I'd go with a 115 or 150 I think. The fact that the deck drains go into the bilge bother me. I dont think that was original, and re-piping them may be tough. Should I re-pipe the drain straight down through the hull OR take aft out the transom; I'd rather not go through the transom, how about going out each side?? My thought is to possibly sell the 225 and purchase a 150 or smaller.