Question about Generac Electrical Supplies

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I have an older model Niagara 4kw by generac with low hours. I started it recently for the first time in 3 years. It ran fine but produced no current. I checked the brushes and cleaned the slip rings but still no go. Any ideas greatly appreciated.

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  • rstoecker Jul 31, 2010

    Niagara by Generac 4000 watt Portable AC Generator model 8795-0.

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I have not seen yor generator in practice, but saw some pictures of it.

As it is an older model, but it is not rare for modern generators too, when they stay a lot of time (3 years is a good lot of time), they lose thier magnetism.

In order to build the magnetic field up again you can connect for a short time (1 - 3 seconds) by a working motor, a 12 V battery to the field terminals, + and - respected. A series diode 10 - 25A to battery can stop the built up field voltage to overcharge the battery.

Posted on Aug 01, 2010

Testimonial: "Thank you for the prompt reply - it seems to make sense and I'll try it."

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