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After several years of storage, my 5000 watt generator will not produce current. I was told the magnets inside would loose there magnitism and could be brought back to life by using a 9volt battery. I am not sure about what to charge with the battery if this would even make a difference in the unit. I checked the reset breaker as well as all connections and they all look fine. Thanks for the advise.

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  • cgfireman972 Aug 07, 2009

    Still looking, not sure how to go about flashing it, thanks

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Yes, you could need a flash the gen. Write back if you still need help

Posted on Aug 06, 2009

  • Craig Butler
    Craig Butler Aug 07, 2009

    You will need to flash the rotor field of the generator, it's not difficult, or dangerous. Take the rectangular cover off the end bell and get 12 volt battery ready, get jumpers ready:


    • Start generator

    • Obtain a 12 volt DC car battery

    • make two jumper leads from wire long enough to reach from battery to brush assembly of rotor.

    • connect + positive lead from battery to top, or right side brush holder.

    • take - negative wire from battery and just 'touch' the other brush holder which is negative.

    • Check for voltage out @ plugs

    • Flash 3 times, if nothing out, move on to further testing.


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2 Answers

How do you flash a generator


Flash Your Generac Portable Generator with a Corded Drill ...

? 1:14
https://www.youtube.com/watch?v=-LR62sm7USU
Oct 31, 2012 - Uploaded by Generacpowersystems
If your portable generator runs but doesn't produce output voltage, you can use a corded drill to reintroduce ...

Re-energizing Dead Generators - End Times Report

www.endtimesreport.com/dead_gen.html
Follow these steps to flash the generator: Plug the electric drill into the generatorreceptacle. (Cordless drills do not work) If the drill is reversible, move the direction switch to the forward position. Start the generator. While depressing the trigger on the drill, spin the drill chuck in reverse direction.

Generator flashing

www.dieselduck.info/machine/03%20electricity/flashing_generator.htm
To restore the small amount of residual magnetism necessary to begin voltage buildup, connect a 12 volt battery to the exciter field while the generator is at rest, as follows: Remove exciter field leads F+ and F- from the voltage regulator.

Flash A Generator - Davidson Sales Co Power Generation .



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1 Answer

Where are the exciting field wire fuses located


Try putting 12 volts DC across the commutator coils at the brushes, sometimes the generator looses it's magnetic field and this could possibly restore it but make sure it is a low current not a car storage battery.

Good luck,

Marty

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Why wont it produce electricity?


It lost it's magnetic field. Try putting 12 volts across the brushes just for a second or two. Do not use a car storage battery. Sometimes it may work using a 9 volt battery.

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Marty

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if you take the end of the generator off you will see a rectifier or four diodes with a varister or a full wave brige rectifier, sounds like you have a bad diode, or a shorted exite winding to the rotor, the exite winding is a small turn winding feeds the rectifier board that ac signal is converted to dc to feed the rotor ,the rotor produces a magnetic field which rotates inside the stator windings , the magnetic lines of flux from this field cut through thre stator winding inducing a voltage in the stator coils. hope this helps

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Without knowing the exact model generator you have, it may not even have an automatic voltage regulator (AVR). Colemans were known for losing what is known as "residual magnetism", especially when sitting for long periods of time without use. This residual magnetism is necessary for exciting the field to produce electricity. Here is what you can try: Plug a 110v drill into one of the 110 outlets. While the engine/generator is running, with an open hand (not fingers wrapped around it) spin the chuck while holding the drill trigger in the run position. Many times this small amount of current that will be produced by spinning the drill motor will restore the residual magnetism and excite the field. Keep in mind that if this works, the drill motor will begin to spin immediately since it is plugged into the outlet. Hope this helps.

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I have a coleman powermate 6250-5000 running watts-generator. The generator starts and runs but does not produce current to outlets,the outlets are fine-they have continunity,I removrd the armature and...


You may have just lost residual magnetism in your rotor. Start genset then apply 12 vdc to 120 v outlet for less the 1 seconds. This will be enought to restore the residual magnetism to the rotor and the unit should be producing power now.

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Hi I have an eagle power generator (E65DRE) and it will not generate power. All the coils and components are alright. Do I have to (excite) the generator after it has been sitting for a while? Has any one...


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if the generator has been sitting for a while you might have to excite the magnets to start producing power. plug in a reversible drill and with the generator running turn the drill in the reverse direction by hand while holding the trigger in the forward position.

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