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I have a honda generator em2500x voltage problem

I have a honda generator em2500x serial ezcn1084497. The generator produces only some voltage. ie will run a drill however if I load it up it with more voltage it stops generating completely. I turn off the motor and turn it back on and it starts generating again. I have taken the generator apart and have checked the brushes and stator and rotor and they appear to be ok. I am wondering if the the voltage regulator is done. It is expensive to replace and if that isn't the problem I am stuck with the part. Is there a check I can make to see if the voltage regulator is functioning properly Thanks
davedulmage@sympatico.ca

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  • davedulmage Aug 14, 2009

    I have fixed the problem it was the voltage regulator as I had suspected. Thanks all for your suggestions.

    davedulmage

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Cummins P2200, 2KWatt, it starts fine, but after a couple of minutes, it gives quite high voltage output, meter needle goes beyond 300v, engine speed seems high since throttle is increased, indicator light on generator also becomes bright, after a minute or so, things come to normal, sometimes takes few minutes to come to normal, situation is same, with/without output load. this happens within initial 15 minutes after startup, afterward everything is normal.

Posted on Aug 14, 2009

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My E2500 did this. Turned out to be dirt in the brush holders causing the
brushes to have less pressure in the slip rings. Stopping and restarting
joggled the brushes to make better contact until they wore down again.
Pull your brushes and make sure they slide easily in your holders. Also
you may need to replace them if they are worn too much or clean the
slip rings. Good luck. Doing your own repairs is fun.... especially when
they work.

Posted on Jul 29, 2009

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Posted on Jan 02, 2017

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You'll need to test to see if you are getting voltage from the brushes. This is a live test so, using something like alligator clips or such on the metal bracket of the brushes for your volt meter is a good idea. Simply start your generator with the volt meter leads attached to the the brush holders or exposed electrical connection to the brushes and see if they are producing electricity (120vac or greater). No voltage then it's your brushes, field, or stator. If they are good check the output of the voltage regulator. If it to does not kick down any voltage above 120 then it's your problem.

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