I own a 2007 15hp 4 stroke Mercury outboard that I seldom use (less than 8 hrs use). I moved it while cleaning out my garage and later noticed a small amt. of oil leaking by the propeller running down to the skag. The motor was left on it's stand except when I physically picked it up off the stand to move it. The motor was also elevated when on the stand but that's it. I've never noticed this before. It seems that have stopped and the quantity was only 3-5 drops. Any ideas ???