[Farmall] Gas in crankcase

[Jerry Bossard]

Hello Fellow Farmall fans and experts!

Can anyone tell me how gas would get into the crankcase of a '42 H?  Is it
possible to get in from the governor/throttle control?

I went to check the oil level on the crankcase and when I opened the
test cock l found oily gas coming out.  I know it's gas because it smells
like gas, doesn't separate like water and oil, and the oily gas ignites.  I
used a paper towel to clean a spot off the floor of the mixture and lit the
towel on fire to confirm gas.

Any thoughts are appreciated. Tractor seems to run ok.

Thanks.

Jerry