Question about Coleman Powermate Premium Plus 6250W Portable Generator

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Coleman Powermate 6250 stops after 5-8 minutes of running

My generator has only run about once every 6 months or so for about 15 minutes at a time. Now, when I start the generator, the engine will stop abruptly after 5 to 8 minutes of running. I suspect the carburetor is gunked up somewhat because it will not run well without the choke at least a third of the way on. One hint: the last two times it stopped, it caught again right before it stopped completely and ran another 5-10 seconds or so.
* Could the low oil trip mechanism be the culprit? I have filled the oil filler as full as it will go with the appropriate oil.
* Could heat be an issue? I'm running the generator here in Hawaii on a 85 degree day.
Any suggestions appreciated

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  • f185 Jul 29, 2009

    PS: This generator uses the Briggs & Stratton 10hp engine.

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The carby needs to be cleaned out properly the jets blown out with air.when you intendto stop useing for any length of time swich the fuel off and let itstop by running out of gas or drain the carby before storage ,as fuel evaporates and the additives dont they build upafter a while and start to block the jets make sure motor is level,oil cutoutcan be fooled if not level ,disconectwire if worried about that bing the problem

Posted on Jul 29, 2009

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Sounds like dirt or water in the carb. If you can remove the bowel and clean it then do so. I like to use SeaFoam to clean any deposits. This stuff works miracles and on many occasions have had a motor running rough and add some to the tank and stood there after a few minutes and the motor would smooth out.

Posted on Jul 30, 2009

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