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John Deere 185 Hydro won't stay charged

I am having trouble with my rider not staying charged. Its a John Deere 185 Hydro, Kawasaki engine fc540. Thats about all i got on it. If there is anything else on it i need to look for, please let me know. What i know is, every season, i replace the battery at least once, and even when its brand new and i put it in, the battery light is always on. Its just draining the battery and not charging it. Is there some sort of alternator, or solenoid, and if so, any idea where and if its easy to replace/cost effective. Any help is greatly appreciated, as im at my wits end with it and ready to pave my whole yard. Thanks in advance.

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  • Anonymous May 25, 2009

    i put two new batteries in my john deere riding mower it will not hold a charge changed my belts and tension rod last summer do you think that has anything to do with it

  • Benelatus May 11, 2010

    Hallo,



    I don't know too much about Kawasaki engines, but I'm fairly certain that the generator/dynamo on yours is faulty, and has been for some time.If it uses a alternator, then most of the control circuit usually lives in the case if it's a dynamo, then the control gear could be elsewhere.



    The first thing to do though, is to make sure the alternator/dynamo has a mechanical drive to it. It sounds stupididly basic, but I've found that most "faults" are fairly simple to cure

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I had the same problem on my lx176. Check all your connections first. If they are all ok and fuse and fuse link are ok, unplug your magneto connector. Mine is a 2 prong plug by the dipstick tube. Connect a voltmeter to the engine side of the magneto and set it to AC VOLTAGE SETTING.. With the engine running I think I remember it should be putting out about 30 volts AC. If you have close to this voltage there it is probably your voltage regulator. Mine was. Hope this helps

Posted on Mar 22, 2010

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I had the same issue, thought it was the regulator, but just turned out to be a bad fuse. The regulator is behind the battery, first follow the wires and find the 1 with a fuse. Take the fuse out, and replace with a new one. If that doesn't work, try replacing the regulator. Be sure not to buy a regulator from John Deere, it will be about 2 as much vs finding one from Kawasaki dealer.

Posted on Nov 16, 2009

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Ck fuses, voltage regulator,and all cables and ends.

Posted on Sep 07, 2009

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SOURCE: John Deere 185 Hydro won't stay charged

Check Diodes on Charge Circuit

Posted on May 25, 2009

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