Re: Breeze tonight, Gale tomorrow?

[frankr]

Yeah, common in small OMC motors, it acts as a rotary valve that opens when there is pressure in the lower crankcase section and suction in the upper section. That difference in pressure causes oil to flow up from the bottom to the top main. Most such engines have a small exterior hose or tube for the oil transfer. I don’t know how it was plumbed on the 12hp wedge.

I do not know if this satisfies as a puddle drain or not (your question). Other models had puddle drains in addition to the rotary valve setup.