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    jtw klw's Avatar
    jtw klw Posts: 1, Reputation: 1
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    #1

    Jul 24, 2009, 02:55 PM
    Battery will not hold charge
    I have a14.5 h.p. briggs and stratton riding mower . Ihave changed the battery,starter, silonoid and diode .the battery will not hold a charge .it has 15 to16 volts going to the key switch but from there nothing .could the switch be bad .if so how do you test it . I have to charge battery before every use . Please help me
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #2

    Jul 24, 2009, 03:19 PM

    Have to run real quick, 3 things come to mind, Bad Battery, Not Charging, or a Drain/short of some kind. Charging can be seen with a voltage increase when running. A drain can be seen with ampmeter or a bulb placed between the battery terminal and the battery cable.
    If the bulb is lit, you have a drain, if it is off, the short/drain is cleared.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Jul 24, 2009, 04:24 PM

    Try charging the battery, let it sit for a full day and then turn the key. If its dead you either have a short or a dead battery. Disconnect the negative from the battery and then lightly tap it back on the terminal, see any sparking?
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #4

    Jul 24, 2009, 04:46 PM

    Hi,
    You have a short somewhere, sounds to me. Disconnect battery leads, negative first, and check the resistance between the leads. Should read infinity. My guess is you will read about a 1 k ohm, about the resistance it takes to run a battery dead in about a week. Do not leave the battery in a discharged state or it will quickly go bad.
    Tell me what you find. If I guessed right, please provide the model info. Oh, you say you changed the diode; put the stripe on the correct end?
    Peace,
    Clarke
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