I have a 1982 bayliner with a AQ120 volvo penta in it. The engine threw a rod and I replaced it with another from a couple of years newer, everything bolted up except the circulating water pump. the bolt pattern is different in the newer block. How do I find what pump I need to look for? the old block serial # is D820909 the newer one is B230 860912 could anyone tell me what engines I have and if I will be able to get a pump for it or will I have to get another block. I haven't had any luck from our local dealers except buy a new boat.

 

Im not an expert but Looks like the original was a full marine engine and the newer one is a car engine converted to use fro marine.

 

the aq120 is b21/b23 based
a aq131/151/171 will be b230 based.