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    jbarton946's Avatar
    jbarton946 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 10, 2013, 09:05 PM
    I have a john deere la125 lawn tractor that the gas pump is also pumping oil
    When my oil level is at the recommended level the fuel pump start to pump oil.
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #2

    Mar 12, 2013, 08:34 PM
    Hi,
    Generally, that means that the diaphragm in the fuel pump has a hole in it. One side of the pump is exposed to the crankcase, moving the diaphragm inward and outward drawing fuel in and pushing it out through one-way check valves. A hole would expose the fuel system to the oil in the crankcase. Usually it is a B&S #808656 pump.
    Peace,
    Clarke
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