Tohatsu Guru please help: My M40D2 has 3 unburnt oil recirculation lines on the side. One of them worked loose from it's nipple due to a weak hose clamp while the engine was running on the garden hose. It was the recirculation line with the nipple half way up the engine. The engine started backfiring and when I put the line back on it stopped backfiring. Some oil came out of either the nipple or the line and it was milky colored and not black. I know for sure there was no water outside the engine for it to fall into. Do I have a cracked crankcase, head or bad seal? Or please tell me it's normal or something simple and cheap to fix. Thanks, David.