HeI have a warner marine mf 181 skimmer. It has been working great until yestery. O was painting my Livingroom and heard water splashing. I go over to stand and notice skimmer is overflowing. I hadnt adjusted it at all. I closed the inlet valve and air valve all the way to keep it feom flowing over but the bubbles come out the bottom where the outlet is. If i open the air valve any it overflows. I have taken it completely apart and cleaned but still isnt working right. Any advice??

