I am looking at a 1988 16.5 foot Oliver Bowrider with a 3.0L OMC. Boat is in really good condition, and the engine has only 300 hours on it. My understanding is that most os these 3.0l engines were 140HP, but seller says this is rare 170 HP. I know that OMC had a H.O. 3.0L in that year, could this be what he is talking about or is he full of it. Thanks.