I have or am about to have a 89 bayliner 2.3 omc. ....guy I'm purchasin from said he was out on the water for about a hour and the prop stopped turning...the problem is still there..any ideas of wat this could b?another question is can i swap outdrives. From the omc to a merccruizer on the omc engine? Or do I have to swap both engine and outdrive to b matchin?