It's definitely coming from the underside of the crankcase at the seam. When I pulled the cover, the old gasket looked to be in pretty good condition, was in one piece, and the sealing edges of the case and cover were really clean. I had a feeling it was gonna still leak after it was all bolted together:sadcrying4:. I didn't notice any hairline cracks or fractures. GTO, I think I might have to try your fix if I ever end up putting this thing on a frame. Something else that I found interesting was that when I laid the engine on it's side to clean and check underneath, the fresh oil started pouring into the carb and out through the air filter hole:doah:. So, I think I'll just concentrate on cleaning up the 4hp briggs. I gotta say it again, this place is a wealth of knowledge. Thanks again guys!:thumbsup: