Question about Power Generators

1 Answer

Volts to high

240 side volts to 257 - 120 side volts to 134-135

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  • Anonymous Sep 27, 2008

    I had the same problem with my Coleman Powermate Black Max 7000W-8750W Mod# PMO497002 with a 13hp Honda. I took solution#1's advice and turned down the RPM and the voltage dropped accordingly. On a 13hp Honda, it is a phillips head screw with a coil spring around it. With a voltage meter plugged in one of the AC outlets, turn the screw CCW until the desired voltage is achieved. Thanks again.

    Since Coleman went down hill, I couldn't even get any of their previous service centers to even look at it. I had to take matters into my own hands.


1 Answer

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

Posted on Sep 27, 2008

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I have a Kohler 7.3 ECD generator with error code UVunder frequency. Restarted gen and it ran for one hour so I shut it off. What's the problem?

check the operating rpms
the rpms determine the voltage and frequency and can be adjusted at the governor spring setting
adjust it until the voltmeter reads the required voltage
set slightly above to allow for rpms drop under load
for example if 240 volts set around 250 volts and that will drop back to 240 volts under load
if 110 set around 115 and that will drop back under full load
both frequency and volts are dependant on rpms

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as 240 volts is single phase , it will not be possible to reduce the power by cutting across a neutral wire ( 240 volt power out and 240 volt neutral return That is ac power ) to do what you want to do you will need a 3 phase generator so that you can jump across a phase to get lower power

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1 Answer

I started the generator it will run in 110 side but when I kick on the 240/120 switch the AC breaker kicks out... I just bought this used from a second hand store.

thers a shorrt in the unit try a volt metor before breaker. see what you got there is a surlly a draw or short in the 240 volt side.should be ok if you use just the 110.used is used

Mar 21, 2013 | Power Generators

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Bad capacitor in the alternator field or a short in the rotor / stator

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1 Answer

Want to add 240volt outlet to generator

You CANNOT do this, USA 240V is derived from a poly phase scenario, IE 120V line to neautral and 240V line to line, UK 240V is derived from 1 line to neutral it will not work unless you power a transformer

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1 Answer

Hi, is there any way these can be converted to 230-240 volts as i have the 110-120 volts unit, it does have a 240 volt plug but its a weird looking 4 pin type, cheers, Rob.

I don't understand. It if has a 240 volt plug, then it has 240 volts, and all you need is the right plug. You can easily make an adapter cord that had the "weird" plug on one end, and the type of plug you want, on the other. All 4 pin plugs are 240. Two are power out of phase with each other (black and red), one is neutral (white), and the other is external ground (green). Actually 240 volt does not need the neutral (white), but it allows for more flexible use of the plug.

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1 Answer

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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1 Answer

On the outlets it has 4/120volts outlets and 1/120-240volts outlet. Can you use the 120/240 outlet as a reg 120volt? And what is the reason of the 120/240 outlet. Thank you

The reason for the 120/240 volt outlet is to be able to run things like large electric heaters or even your clothes dryer as they all require 240 volts. If you use it as 240 volts you will not have maximum current output on your other outlets so you wouldn't be able to plug anything really big in. And yes you can only use is as a 120V output if you would like but you will need a special attachment or extension cord. I'm going to leave you with two reference pages I looked up that you should have a look at.

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1 Answer

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Were is your voltage reading of 240 volts coming from. Have you checked your fuses. I hope this helps please rate this thank you.

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