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My generator is not putting out the proper voltage? it's only putting out approx 75 volts on the 120 volt circit. i adjust the idle to full out and i get approx 112v.

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Most low voltage conditions on generators are simply due to a low engine rpm. Most modern generators are 2- pole windings. So your engine rpm should theoretically run @ 3600 rpm. which will produce 120/240 volts @ 60 HZ. In actuality You want to set your rpm's @ Approx. 3720rpm no load. About 62.5 Hz. Without getting to technical this will give you your desired 120/240 volts loaded. Hope this helps.

Posted on Aug 10, 2010

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1 Answer

How to increase the output voltage


Measure the Generator after 10 minutes the first measure but not only to one power outlet with doing a measure with a multimeter its not done so because the generator is fully unloaded then you will see 105 vac
Measure on one outlet and use a paint stipper a 2000 watt type and measure at the same time on the second power outlet with a multimeter on AC you should get more volts out to measure instead of 105 volts then you hear that its generate power and blow more smoke you will be seen a 115 or 120 volts if you increase this generator its possible you get if you are increase the idle power to 120 volt can create an over loading of 200 volt or more over the outlets that can give damage if it the stator electric field generate power outside its level it can blow up your expensive tools and in a short time you think there is not enough power on my tools anymore then your armatures are become bad and the tools are hot in a short time warmt dissipation has blow up armature and nothing smels hot but the tools are blowing up. and you see nothing inside because the tools will not are getting black burned and hot but the to high magnetic pulse burns the weak points inside the armature in a fraction of time.
Beware of that the adjusting is normally doing with a tacho meter and a suggestion of about 3000rpm and not more of the stator what its max depend on model . but adjust by the load power of a working paint stripper it can have enough if you adjust 120 volt by load.

Mar 06, 2016 | Electrical Supplies

1 Answer

Miller roughneck 2e has low voltage 0ut of 120 volt receptacle only 5 volts at idle and 45 volts under power


have the alternator checked by an electrician
a t idle will be low as the exciter circuit will be producing low volts but it should go up when at operating rpms
45 volts at rpms indicates that the field windings of the alternator are not getting full current to produce the desired out put

Nov 20, 2015 | Miller Electrical Supplies

1 Answer

Troy Bilt 8000 watt generator is not puting out full 120 Volts after converting to run on propane.


if the rpm's are not right the voltage regulator can't put out more than its putting out

May 28, 2012 | Garden

1 Answer

Briggs & Stratton 12KW Model 040229 LPG Generator. 96 Volts @ the 120 Volts outlet, When I turn the house 2 Ton AC voltage increase to 106 Volts.


Can you manually adjust the voltage on the generator without load?? If you have 120/240 60hz output on it and you are not overloading the unit (amperage), then it may be as simple as adjusting whats called your gain setting for your voltage regulator. Obviously you are seeing what happens when it is set too low. Trying raising that setting until it becomes unstable then back it off. Unstable meaning voltage starts jumping all over.

Jun 27, 2011 | Briggs & Stratton Briggs Stratton 7 kW...

1 Answer

Generator has voltage drop, why?


Most of the small portable generators will depend on the engine speed to regulate the voltage. If the motor is at the correct speed you are getting 120 volts 60 hertz, if not it will read lower like 115 volts 55 hertz or so. This can be fixed by adjusting the governor, or idle speed needle.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Feb 16, 2011 | Yamaha 2300 Watt Generator - EF2600

1 Answer

Hi output from generator


I found out that the gasoline motor was turning too fast so I had to turn down the speed of the motor with the adjustment screw.

Sep 06, 2009 | Northstar Generator 9 Hp, 5500 Watt,...

1 Answer

Engine runs but no AC or DC output.


  1. Remove the rectangular snap-fit cover from end bell
  2. Start generator making sure it's at rated RPM
  3. Using volt meter test brush terminals.
  4. Use red+ lead on top or right brush black is - negative
  5. should see approx. 75 volts DC
If no voltage, need to flash with 12 volts DC same polarity as above, for 5 seconds

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Aug 03, 2009 | Coleman Sport 1850 Generator

1 Answer

Volts to high


in order to set voltage you have to adjust the govener idle screw , that is what helps regulate the voltage, the higher the motor revs, the higher the voltage, the lower, the lower the voltage. the govener arm is normally a gold color arm with a small rod connected on top of the block. it should have a screw with a nut, or just a screw. turn counter clockwise, then ck voltage output,repeat till desired voltage. i usually, set mine at about 124, because once you put a load on it, it will bring the voltage down some. hope this fixes your problem. let me know. troy

Sep 27, 2008 | Electrical Supplies

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