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Bill, Check the crank case breather and clean it out. Also, make sure the hose coming from the breather to the air cleaner boot is clear. Also, make sure this hose is the correct diameter - too small will cause restriction. Is there oil coming out of anything else? - like the valve cover gaskets, etc. If not - I would just replace the cork gasket under the fill tube cap. Good place to start, anyway. Jeff

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Check to make sure there isn't gas in the oil. ie. smell it! If there is, your fuel pump diaphram may have cracked and gas may be dumping into your crankcase. Paul

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The crankcase breather has a disc with three plastic ball that act like a check-valve. There is brass wool above this with a screen. Clean these and inspect the balls. Replace them if needed. Get parts fron Onan or Cummins.

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      It's in pretty sad shape, but yes I have a yellow plastic cap that I'm fairly certain is what you need. PM me your details and I'll get it out to you.
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