Generator was running and quit delivering voltage while running. Turned it off and then restarted and checked voltage with no load. no voltage...no smell...plenty of oil...seems like a breaker8000 exl...# 09800-1...sn 1754188

There could be several reasons why the output voltage of your generator is not within the normal range. Here are a few things you can check:

1. Make sure the generator is properly grounded.
2. Check the voltage regulator. It could be malfunctioning and causing the high voltage output.
3. Check for loose or damaged wiring. Any issues with the wiring could cause the voltage to be incorrect.
4. Check the engine speed. If the engine speed is too high, it could cause the voltage to be higher than normal.
5. Check the load on the generator. If the load is too low, it could cause the voltage to be higher than normal.

If you are unable to identify and fix the problem, it is recommended to have a professional technician diagnose and repair the generator.

It sounds like you are experiencing an issue with your ex5500 generator where the voltage and frequency are not within the correct range when the generator is running. Here are a few steps you can try to troubleshoot the issue:

1. Check the load: Make sure that the load you are running on the generator is within its capacity. If the load is too high, it can cause the generator to run at a lower frequency and higher voltage.
2. Check the fuel level: Make sure the fuel tank is full and that the fuel is fresh. If the fuel is stale or contaminated, it can cause the generator to run poorly.
3. Check the spark plug: The spark plug is responsible for igniting the fuel in the engine. If the spark plug is dirty or worn out, it can cause the generator to run poorly. Clean or replace the spark plug as needed.
4. Check the air filter: The air filter is responsible for cleaning the air that is drawn into the engine. If the air filter is dirty or clogged, it can restrict the flow of air to the engine and cause it to run poorly. Clean or replace the air filter as needed.

If none of these steps help resolve the issue, it may be necessary to have the generator checked by a professional. They can diagnose and repair any underlying issues that may be causing the generator to run poorly.

What type of load (electrical) was hooked up to this generation?? If the surge voltage and current was exceeded above the generator maximum for any length of time. There problems, it could be the regulator, insulation burnt off the windings.


I am taking a guess here. Now, 7100 Watts is it typical surge wattage. This mean that the generator will deliver 7100 Watt (voltage times current) this is know as the power factor. The actual operating load would be 6800 Watts and I would even operator the generator at its peak wattage. Something in the neighborhood of 10--15% less the peak wattage. Therefore a good positive theatrical Wattage would be 5800 to 6350 operating wattage. Then this generator would run all day.



Just remember Ohm's Law. Current plays a big factor in loading of a generator while the operation voltage is at 120 AC Volts. Example: electric motor; Now electric motor when starting will pull three time its operation current. Operating current for a 1/2 HP AC motor is 6 amperes but start this electric motor will require 18 amperes. This is one reason why they starting capacitors on smaller electric motors. Larger three phase electric motor can literal stop a generator cold...in its tracks. It put such a large demand on the generator it stops the engine powering the generator. I have seen crankshaft break because the generator could handle the heavy current load.



Remember, any time you are running a small gas powered generator. All ways figure what the load and surge current load will be before hooking up any generator. Normally this is figured in VA (volt/amps). Wish you lock. GB...stewbison

Here is the code explained direct from Kohler's manual. I'd disconnect the generator load first.
UU Undervoltage Shutdown occurs if the voltage falls below 80% of the nominal system voltage for more than seconds. Check wiring and connections.
Reduce the load and restart the generator set. —
Check wiring and Check controller configuration, system voltage
and frequency (parameter UU).

Check AC voltage and adjust, if necessary. 5.7
Replace the SCR module and test voltage again. 4.9
Separately excite unit. 5.2
Check stator continuity

See web site for manual :http://www.kohlerpower.com/onlinecatalog/pdf/tp6196.pdf

Is your generator 4 kW or 4000 Model 5500.
If 5500 as on the picture over your question the reason may be short in the receptacles or low voltage/ rpm.
If 4 kW MicroQuiet, there the reasons may be too much, that you will nead a troubleshooting manual.

Those voltage readings MAY be normal.

The AC waveform may cause your meter to read inaccurately. You would need to use a TRUE RMS meter to accurately read the voltage.

The siple meters actually read the AVERAGE voltage and then are calibrated to mulltiply it by the "form factor" for a sine wave. OFTEN these generators don't produce a clean sine wave. A square-ish wave will read higher on the garden variety meters.

Compare the brightness of a lamp comparing to when run on your utility.

The frequency depends on engine speed ... yours is running a bit fast...check it under at least half load and if off, adjust the govenor slightly.

Well I assume that this generator is NOT three Phase, and delivering 440 Volts? in that case, that reading is what is called and "Open Circuit" reading, with a full load, that reading will/should come down to the nominal voltage of 250 V (+/- 10%) This generator is a 250 V AC unit? If this is so then it is operating correctly? It is 5kw UNIT. using a digital multimeter due to it's large input impedance it will often give erroneous readings if NOT loaded down with the correct.any. load.?

Make sure that the alternator is being turned by the engine--sometimes the mechanical coupling fails. Check for a tripped breaker/blown fuse. Beyond checking for bad brushes (if used), you will need a wiring diagram and an AC/DC voltmeter/ohmmeter to chase out any troubles in the alternator. Be aware of voltages up to 230 volts can be found inside even if there is no output.

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.

My guess is that while it was running out of gas the balnket and heater was pulling a load that the generator could not keep up with. Do you still have the manual????????