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    slockhar's Avatar
    slockhar Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 12, 2009, 12:09 PM
    Gas getting in oil reservoir on John Deere riding mower model STX38
    John Deere riding mower model STX38 is getting gas in the oil. I drained the oil and it smelled of gas and had the density of gas, not the thickness of oil. Any suggestions as to how this is hapenning. I can change the oil and put gas in it and it runs great for some time.
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Jun 13, 2009, 05:23 PM

    Hi,
    You did not say whether it was a yellow or black deck, though that would only serve to give me a rough idea of the age. At any rate the inlet seat in the carb is worn out, a common problem with that family of Kohler engines at that age. The best cure is a new carb; you can replace the inlet needle, but that usually only proves to be a temporary fix that will not finish out the season. The other cure I have seen many times is to put a fuel shutoff in the fuel line going to the carb and to use it "religiously." I cannot begin to count the number of STXs I have seen with that added.
    Peace,
    Clarke
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