I have just bought a 1987 Renken 20 ft ski boat, with a 4.3 omc motor. I need to get a manual for this motor. It is in bad need of a tune up. This is my very first boat, anyone with advice or can help me will be greatly appreciated. I understand the Renken is out of business now? Also on the ventilation blower is there only one blower and pipe or are there suppose to be two? I guess you would use regular engine oil, but what about the power steering and do you put anything in the transom and where? I am in bad need of guidance and advice please help! 