I purchased a 1990 champion 20'1 and I'm hoping someone can help me in locating the livewell pump. I know it's in the back somewhere lol I can hear it squeal every now and then... I'm thinking it's under the gas tank but just wanted to ask here before I take tank out if I don't have too. I don't know wat model it is. But it's a dual console bass boat ( obviously lol) with one live well in the back if that helps.

They're usually right back next to your bilge pump. 

Yea that's wat I thought too but I can't find it either... There are wires running under the batteries right along bottom of the boat maybe they are under there? Idk I guess I'll just start rippin stuff out lol and c wat I find.

Underneath the oil tank of its like mine. There should be a white "grip" on each side of the oil tank. Pull up then out on those and the oil tank will be free. Set it aside and the piece it was sitting on will come out, revealing the bilge area and the pumps.

My Champion has a floor plate under the oil tank.  I have to take the batteries out and the oil tank out to get to it and remove it.  Then down in the bilge area is the bilge pump and livewell aerator pump as well as my in hull transducers.

Oh that's right, one of my batteries has to come out too. I imagine yours is the same, op.

Thanks for the input fellas