Question about Coleman Powermate Premium Plus 6250W Portable Generator

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My powermate pm0647000 stopped generating electricity.

I'm trying to troubleshoot: should I have continuity between the rings that the brushs rub against? Thanks, Phil.

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  • Bonnie Egbert Oct 05, 2008

    I have the same problem. Brand new out of the box for Hurrican Ike. Used it off and on for 3 days. The motor started up and was working fine, but it stopped generating electricity. Any ideas. I box this for Hurricane Rita but never needed to use it, so now it is out of warranty even though it was used for the first time on 9-13-08

  • Bonnie Egbert Oct 05, 2008

    My Coleman Powermate 5500W Portable generator was new out of the box after Hurricane Ike came to Houston. It was used for 3 days, and worked great. On the 4th day although the motor ran just fine, it stopped generating electricity. I bought this for Hurricane Rita and never had to use it, so it is out of warranty. It was used for the first time brand new on 9-13-08. The generator is really poor. The sound was so loud it was deafening!



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Pramac has bought coleman powermate phone number is 1-800-445-1805 . if sparking rotor doen't work it is more then likely the printed curcuit board in th back of the generator head.

Posted on Oct 15, 2008


Flash it !
Start your generator, plug a single speed drill into the recepticle, while the generator is running make sure the drill is in the forward posistion then turn the drill chuck couterclockwise with your hand untill your generator power's up.
This simple fix " excites " the stator.
Good luck !

Posted on Oct 08, 2008


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Check the rotor rings for cleanliness, they should be shiny, check the brushes and the capacitor, located in the end of the alternator bell housing cover

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I am assuming after re-fueling your output power stopped working. If this is the case then remove the small cover from the end bell and inspect the brushes. They must touch the slip ring. The best way to check to see of the brushes are touching the slip ring is to use a multi-meter on a Resistance scale of R x 100 or R x 1000 and you should see a very low resistance reading. If you have a high resistance reading or an open indication on the meter; the brushes are NOT touching the slip ring. They are either too short from use or damaged due to breakage or heat caused by loose connections.
Inspect the brushes one at a time. There should be at least 3/8 inch of visible carbon brush. Anything less and it is time to change the brushes.

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After working on several of this style coleman generator,i have found that the lead wires in the windings that are soldered to where your brushes would contact tend to break.I don't know if it's a poor design or just a fluke,i would check to see if your getting continuity on the rotor and go from there.They seem to either "burn off" or just break.

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Make sure it is not the brush set.
There must be continuity from one slip ring to another.
If not, but rotor doesn't look burnt - check points where rotor wire is soldered to slip rings, or clear contact point on each side of wire and check continuity there, past slip rings and brushes. Big chance that wire came loose from slip ring.
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Unless your model is Inverter type - there is AVR module.
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