I have just bought a 1988 four winns from my brother in law.the boat was setting outside and the lower unit was stolen.I need help to determine the exact part that I need.<br />the engine is a mercruiser alpha 1 3.0 liter 4 cylinder 130 hp.this is what i know about the engine <br />is there anything else that I may need to know about this before searching for one (I'm trying to find a used one!!) If anyone could help me out I would greatly appreciate it.thank you, iceman***.like I said I am new at this and really dont have a clue yet. 