Oil in airbox
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Ok then look at this pdf break down on the 500 engine.https://www.google.com/url?sa=t&rct=...ZN9jLa7SAHw2aI Look at chapter 3 page 12. Shows the oil flow chart along with the one way check valve. Chapter 3 page 32 shows how to remove the check valve,spring and clean the valve plus the case needs to be clean where the valve rides.The valve is suppose to stop oil from the oil tank from draining back into the engine. If the valve is dirty/sticking,excess oil can enter the engine and crank case pressure can blow it out past the filter into the air box.Only a little over a cup or so of engine oil is in the crank case as it's running. Oil cycles through the engine then into the oil tank.Back and forth.The majority of the oil is stored in the remote oil tank.
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