Jim. Been there done that with the oil on the fuel pump. Everything they said is valid, do check all of it. Now here's where I found my oil coming from on my 235.
The oil draft tube has a plate with a fiber filter on the inside of the block. It is held in place with two screws from the outside. mine were leaking and while trying to figure where the oil was coming from I took them out. Mistake. Had to pull oil pan and pick the plate out and rescrew it to the inside of block. I used some permatex to seal the screws and stopped my leak. I hope this helps.Larry
