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How to adjust voltage on Colman 5000 generator

Posted by Judy on

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CarlGehrke

Carl Gehrke

  • 169 Answers

SOURCE: generator wont put out enough voltage, only get 107 volts, is this a voltage reg. problem

This problem is either that the engine RPM is too low (most likely), or that there is something amiss in the voltage regulation. Get yourself a DMM that measures Hz, plug it into the output and see if you get 61.5 Hz, if not look for the adjustment on the governor spring. On some Powermates this is a screw that pressed on the governor arm, on others it's a little tab the governor spring attaches to that you bend. Do this at no load. FWIW 61.5 Hz is also 3750 RPM of the engine.

Posted on Dec 01, 2008

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CarlGehrke

Carl Gehrke

  • 169 Answers

SOURCE: how do you seperate the engine from generator.

Assuming that you intend to someday put it back together, do this:

1 - Make it safe by taking the wire off the spark plug and getting all of the gas out of the tank.

2 - Remove the stator part of the generator. There are 4 long bolts with 7/16 inch heads that hold it onto the adapter plate at the engine end of things and a 1/2 incher holding the end away from the engine down on the frame. Some generators have more than 1 frame mount, these are harder to get out, I use a channel lock pliers to hold the rubber mount and a socket to remove the nylock nut. When it's all loose, pull the molex plug out of the distribution panel (where the outlets are) and then gently slip the stator off of the rotor. Try not to break the windings.

3 - Support the engine/rotor assembly by placing a block of wood, stone, or metal under the rear of the engine.

4 - Take the long bolt out of the end of the rotor. Use a 6 point socket for this so as not to mess up the bolt head. This is also much easier with an air ratchet. The rotor shaft has an "innie" cone shape milled into it and the engine has a corresponding "outie" bevel that fits inside the rotor shaft. This is called a tapered shaft mounting. You can get the rotor off of the engine shaft one of 2 ways...
The "official" method:
Get the kit from Briggs and Stratton, tap threads into the inner surface of the bolt hole, insert the appropriate threaded rod and torque it to pull the rotor free. This only takes one tech.

The "redneck" metohd:
You need a friend you trust to swing a hammer, a fairly heavy hammer (I use an 8 lb sledge), and a chunk of 4 X 4 wood long enough to act as a punch when placed against the rotor laminations. Turn the rotor so that the laminations are horizontal. Put the 4 X 4 against them as far away from the engine as you can without breaking the plastic parts of the rotor. While holding the 4 X 4 tightly against the rotor, have the other guy whack the other end of the 4 X 4 sharply and with a good amount of force. Then rotate the rotor 180 degrees and whack the heck out of the other side. Repeat this process until the rotor pops off of the enigne shaft.
My old shop mate and I got good enough at this to take the rotor off in 2 whacks every time.

Regards,
Carl

Posted on Jan 07, 2009

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Phil Rivera

  • 83 Answers

SOURCE: three year old coleman 5000/6250 generator. High

Your RPM's are too high. There is no voltage regulator in coleman generators (generator is actually made by generac) and is 100% dependent on engine speed. There is a screw under the tank when your looking in from the recoil side. It controls the governor arm. Screw it in and it incresses the rpm, out decrease. Plug something in that draws a decent load while setting the rpms since you want it to put out 120 and 240 underload. Your idle voltage does not matter.

Posted on Apr 02, 2009

lpfaff1

L Pfaff

  • 11573 Answers

SOURCE: How to adjust output voltage on Honda 3000 generator

Hal, you may be able to adjust some what by changing engine RPM(throttle *****) and playing with the governor if need be with no load and with load.

Portable generator voltage regulator

Onan generator adjustment run speed voltage

https://mtspowerproducts.com/admin/data_sheet/SS321Manual%20II.pdf

Posted on Mar 27, 2016

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Voltage is adjusted by raising or lowering the engine speed (governor adjustment), however one must also pay attention to the rpm because your generator was designed to produce 120 volts at 60 cycles while turning 3600 rpm. Your electrician should have tested for htz while testing for voltage. I would recommend re-testing under load and adjust governor to turn 60 cycles to see resulting voltage.

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If you are getting some power, even if it only 2vac then you may have to flash the excitor circuit. If nothing then take the end cap off the generator and clip your meter to the metal portion of the brush holders or exposed wire from them. Start the generator and see if any voltage is coming from the brushes. Even if there is nothing try flashing the excitor.


To flash the excitor circuit on a coleman ( the generator is built by generac) you need a 12 volt battery. You quickly apply 12 volts via your 120vac recepticals. NO MORE THAN ONE OR TWO SECONDS! Then check you ac voltage.

Give this a few attempts and if this does not do it, I would say the winding repair did not work. Buy another generator and use the engine for a go cart or backup engine since this generator is so cheap.

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you can run it up and use a 12v battery and connect it to the brushes correct polarity, with the othe LEADS removed and taped can shock you and chect the out put it it around 100 120v chech the AVR or brush polarity.

If yours dont have brushes it will have a capasitor that is prob out of spec.

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