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Oil getting into carb.

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Crankcase breather baffle is shot in the right valve cover.....crank vent tube is sucking it up. There was an update for the rubber valve.

OR, your engine is very tired and has a LOT of blow by.
 
Pull the dipstick and put your finger over the hole when running. Should have slight vacuum. If lots of pressure, rings are getting tired. Look for blue oil smoke on start up, etc.
 
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