Question about Coleman Electrical Supplies

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Does not generate electric power at 110V or 220V.

Motor on Black Max 7000/8750(Coleman) generator runs fine, but no electricity is produced. Placed known working AVR Module in generator but still did not work. I have read several articles that referred to "Flashing." Could this be the problem with this generator? If so, please provide instructions for "Flashing." All the articles I read stressed the safety issues, but varied somewhat in procedure. Thank You!

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  • gsd1967 May 20, 2009

    Thank You very much for you in depth reply. I am strong mechanical but electrical is my weakness. Best to you and again thanks for giving back what has been given to you. - Sheldon

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To flash fields the genset has to have rings and brushes. The ring towards the bearing or towards you is positive and the back ring is negative. The rings and brushes are on the rotor, which is the part that spins on the generator end. Place a volt meter on the outlet, start the genset, with a 12V battery apply the positive to the front ring and the negative to the back ring. The voltage should climb up to about 50 - 100Volts or more. If this happens then you will need a Voltage regulator. If voltage does not climb up, then check the rings and brushes. Make sure the brushes have a good length and that they touch the rings and make sure the rings have a shiny copper color to them, if they're black clean them with emory cloth until there is a nice copper color and try flashing the gen again. If nothing happens then you need a new generator end or new generator, which ever you prefer. Make sure to use rubber gloves when flashing and look out for rotating parts.

Posted on May 20, 2009

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