Bushwacker,

It sounds like maybe I don't need the 175. Over the years, the old OMC engines always had two or three different engines with the same basic block. The HP was generated through tuning and carburetion. I was always a proponent of going with the engine with the smallest horsepower on that particular block. It seemed logical to me that the less stress on a block, the better. Instead of going with a 140, which was the high HP of the 115, 125 and 140 engines in the 1970's, my dad would go with the 125 or with the 150, which was the same block as the 175 and 185. Whether that is good science or not I don't know - but it seemed logical. Your experience with the 150 points me the same direction. I was looking at a 175 only because the engine I am replacing on my 20SF is a 175, albeit a carbureted rebuilt 1990 yami. Runs like a scared rabbit but drinks like a fish. Thanks for the input!