I have a 1989 Rude 150 (can't find model # or sn) that I'm helping my cousin work on... Engine would fire then not at times and he changed pp, stator and timer base untill now the engine will fire all the time. Problem now is when we ran it in the river it would idle fine but wanted to bog down and had trouble getting on plane. The engine sat for approximatley 2 yrs. and we both think it may be the carbs. Maybe it's the timing?? Anyway the question is what would we have to do to take the carbs off of a 89 175 (Model # E175STLCEB - SN R08276120) and put them on the 89 150. I heard that the only differnce b/w his 150 and my 175 is carbs. Any help?