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Duromax 10000e load runs fine on 120v.When volage selector switched to 120/240 engine seems to be under very heavy load,wants to stall and housing on alternator gets very hot.

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You will need to test the alternator to determine what has failed. We have put together a quick video to show how to do this.
How to test your Electricity Generator AVR Brushes and Alternator on...

All replacement parts can be purchased on this web page:

If you are not sure what part you need after running the tests, please come back to us with the results. We are happy to identify the part you need with the results. :)

We are here if you need us!

Posted on Dec 02, 2016


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My Duromax XP10000E just started to drop volts to zero intermittently while running.

MMmmm... MANUAL here:
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I have a 4500e duromax starts up and runs then shuts off clean carberator same problem looking for suggestions

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Why would cause this welder to load up excessively to the point of almost stalling the motor?

a short or a very bad bearing seizing up or throwing the axle out of alignment under load could do that

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I have a generac 6500 mega force, that has a 60v output on the 120v outlet and 120v on the 240v outlet, the regulator board has a blue wired that acording to the wiring diagram was to be hooked up to one...

You need to run tests on your alternator. We have made some videos to show you how to do this on our website. It is very easy!

We also hold some parts for generac generators if you need them. You can purchase them on this web page:

If you need any more help, please contact our Engineers. They will be more than happy to assist you with repairing and parts supply!

We are always happy to help!


The Generator Guru Team
World Leading Supplier of Parts and Spares for Portable Generators

Mar 18, 2017 | Electrical Supplies

1 Answer

When you put a load on generator it powers up and down and tries to cut off.

sounds like you are trying to put too much of a load on your generator. I have a 3500w generator and when I hooked it up to my 120v (not sure how many HP) well pump when the pump would try to cut on the generator would bog down and even die. took off the load and started right up. will run other things just not heavy loads. maybe you need a bigger generator for what you are trying to power.

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We are getting 155v on the 120 v receptacles

it may be running far to fast, just slow it down a little
how did you get this reading,,,on load or off load???
if off load hook up a light bulb and take another reading,,if its pulled the volts back down thats fine,,,if not plug in to the geny some thing thats close to its full load,,,"not more than this" now take the reading,,,
if still high lower the reves till its just 120v on full load
mind you,,,5000watts? thats a big un!!!!

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I have a Honda generator model Eg1500c. It seems ok....120v 60Hz..but occasionally the motor acts as if it is under a very heavy load and the voltage goes up to 200+ volts. The brushes look good and the...

Hi there,
It sounds like there may be an intermittent short in the output or the stator windings. You'll need to carefully check for bad insulation between the winding and ground, I'd use a megger for this.


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