Hope someone can help me out. The other day I did some fishing with my kids, and today when I walked by the boat I say some milky oil leaking from behind the prop. Its not coming out through the exhaust but from the bottom where the prop meets the lower unit. I don't know how long this has been going on but I don't want to take a chance with my kids onboard. I have a evinrude 48spl. Does anyone have an idea what is wrong or is this normal.