Question about Coleman Powermate Premium Plus 6250W Portable Generator

1 Answer

Coleman powermate pmo645500 wont produce power if you excite the field you can run a light bulb dimmly but when you add bigger load the unit stalls out. no load voltage after exciting the field is around 90volts brushes seem ok any answers. unit has 30 hours and should under warrenty but powemate went under. thanks

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 169 Answers

Hi,

This could be one or more of just a few things, in order of ease to check:

1 - Not enough rpm from the engine. You need some way to measure Hz of the output from the generator. At no load it should be about 61.5 Hz, if it isn't you have to troubleshoot further to figure out why not.

2 - Dirty slip rings causing a lack of rotor current. Get an ohm meter and measure the rotor winding thru the brushes, if it's much greater than 30 ohms or so you need to clean the slip rings.

3 - a bad voltage regulator module. You can check the inputs and outputs, check that the wiring to the module isn't broken, and visually inspect it for damage. These are not inexpensive (ahem)

4 - rarely the stator wiring might be shorting to something in such a way as to load the generator even with nothing plugged in. You would likely also notice a distinct change in how the generator sounds if this were the case.

Rate me please?
Carl

Posted on Dec 06, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Coleman powermate generator runs with no power


If we assume for the moment, that the internals of the generator are all ok. This problem is usually caused by not running the unit on load for a long time, a year for instance. During this time the residual magnetism in the field coils will slowly decay. When the unit is running the field coils control the power generated by the main windings. The higher the excitation voltage in the field coils, the higher the voltage generated by the main windings. The field coils are controlled by their magnets which, once a voltage has been generated, they will then self excite themselves.
However, if all of the magnetism has decayed then the field coils cannot generated because they have no excitation to start them off.
What you need to do is to find the field coil windings and while the unit is running with a load plugged in to it, you need to flash a voltage across the field coils.this will excite the field coils, part of that is used to do whats called self-excitation, honest...it is.
If you do this then a 12 volt car battery is a sensible thing to use for a power supply. But, as soon as the field coils start to self-excite then that voltage will increase far beyond 12 vo9lts. That is why you need a good size load connected, As the unit starts to generate then that load will alert you to remove the temporary supply, if you leave it connected the battery acid would rapidly boil and it can split the battery cases. That is why it's called 'flashing' it up. Once generating it wants leaving for a good hour,
If that does not produce results then the fault is deeper and requires testing by a qualified engineer.

Nov 11, 2013 | Coleman Power Generators

1 Answer

Starts fine...no juice....sat for 10 years in the box...started using it 3 weeks ago...worked fine until yesterday....starts...runs..no juice...no circuit breakers blown...what's up?


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.

Mar 04, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

My coleman 5000 generator with a briggs & stratton engine started just fine after years of colecting dust in the shop. After we let the generator warm up we applied a load and found out there is no...


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.

Feb 24, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

How do i excite my 6250 powermate and where can i buy parts. Runs great but no power at all. Thanks John


One quick way to "excite" the field is to plug an electric drill into the outlet of the running generator. Engage the trigger on your drill and spin the chuck backwards. DO NOT HAVE YOUR FINGERS WRAPPED AROUND THE CHUCK WHEN DOING THIS. IF IT WORKS (not 100%) THE DRILL WILL START UP!!! Coleman was bought out by Pramac, you can find there webpage here.

Hope this helps.

Feb 22, 2011 | Coleman Powermate Premium Plus 6250W...

1 Answer

My generator is only putting out 2.5 volts it is a powermate 5000 what is the most likely cause


Most likely the excitation DC circuit is broken or exciting rectifier (AVR if present) is damaged. If the field has been demagnetized it can be recharged by a 12 V battery, connected for a short time to +, - of the excitation winding, with engine running.

Jul 29, 2010 | Coleman Powermate Powermate 5000W...

1 Answer

Generator wont idle up when a load is applied to the system. If you manually throttle it up it makes power fine, but it won't idle up on it's own.


Are you sure your gen.set is Coleman. The 5000 W gensets of Coleman as far as I know do not have auto idling. If your has, check this:
If by the same load it was accelerated ones (before) you may have problem with current measuring circuit.

Try does it run up with bigger load. It may not go up with loads less than 100 W. It has a big hystheresis on droping down (at less than,about 50 W) and running up (at more than 100 - 150 W).

If this can not help you give some more details in testimonials field in order to give you more instructions.

Jul 26, 2010 | Coleman Powermate Powermate 5000W...

1 Answer

How to flash or remagnitize Coleman Powermate 6875 or Husky 40500


Field Flashing of Portable Generators This tip comes from the Briggs & Stratton Customer Education Department. As an alternative to flashing a rotor winding with a battery applied to the brushes, an electric drill may be used. Follow these steps to flash the generator:
  • Plug the electric drill into the generator receptacle. (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. This will excite the field and the generator will now produce electricity. If spinning the chuck one direction does not work, try spinning the chuck in the other direction as you may have the reverse switch positioned backwards.
Use caution not to get your hand or other materials caught in the chuck. As soon as the field is excited, the generator will produce power and the drill will turn on.
The reason this works is because the electric motor in the drill will act as a small generator when spun backwards. The magnets in the drill's motor induce a voltage into the motor windings, which is fed back through the trigger, cord and into the generators receptacle. From there it goes into the power winding of the stator. The voltage going through the power winding creates a magnetic field, which is intensified due to the iron core of the stator laminations. The rotor intersects this magnetic field as it is spun past the power winding, thus inducing a voltage in the rotor winding. Once current flow is present in the rotor winding the rotor has been flashed.
If flashing the field does not make the generator work, you may have additional problems, besides a lack of magnetism in the rotor. Further testing will be needed. Hopefully, this will give a simple way to field flash your generator if needed - Bruce Perrault

Apr 27, 2010 | Coleman Powermate Powermate 5000W...

2 Answers

Coleman Powermate Powerbase 4000 -no AC Need Field test procedur


Check the voltage sent to the field when running. It will probably be around 12 volts. You can try connecting a lantern battery BRIEFLY to the field to re-magnetize the field. Try bothe polarites.

Some have had a bad rectifier and one had a bad transformer that generaates the low voltage from the generated output. He had a broken wire from the winding to the wire from the transformer. He was able to reconnect the failed solder joint.

Apr 16, 2010 | Coleman Powermate Premium Plus 6250W...

1 Answer

Do you excite generator while it is running ?


Yes! The generater must be running. Only apply voltage for one or two seconds when exciting then check for ac voltage with a meter. You can try again if no voltage. Note: if exciting the field does not work your problem may be something else.

Mar 30, 2009 | Coleman Powermate Powermate 5000W...

Not finding what you are looking for?
Coleman Powermate Premium Plus 6250W Portable Generator Logo

477 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coleman Power Generators Experts

John Trevino

Level 3 Expert

1378 Answers

Phil Rivera

Level 2 Expert

83 Answers

Phil Walker
Phil Walker

Level 3 Expert

602 Answers

Are you a Coleman Power Generator Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...