Question about Northstar Generator 9 Hp, 5500 Watt, Gasoline

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Hello, Bob here. Trying to repair my NorthStar 5500. The generator has no output. (distrobution box disconnected) looking on the output directly from the wireless generator. Do these go bad and are there replacable parts inside them? Is there external controls that make them put out? Thanks. I'm shooting blind, no diagrams.

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  • Robert
    Robert Aug 31, 2010

    please post a ser# of the set as well as a ser# of the gen gead thank you

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On the end of the rotor their is a Diode as well as a varistor these will go bad common in these units and cause a power loss these are attached to the rotor by a strip some like a pc board some a insulated tang to say remove the 2 one on each side Diode part# 778959 varistor part# 778961 manufacture numbers you should be able to go to any electronic store like radio shack and cross ref the numbers as to the diode i don't have the spec's but when you find it it will have the voltage rating get the next size up it is better to go to a higher voltage what the diode does it acts like a 1 way valve power flows one way and if their is a spike it wont allow it to come bach and damage parts before it it will also act like a fuse to sorts to much it will pop. the varistor varies the flow their sensitive and adjustable if purchased from other than manufactures factory it will need to be adjusted hope one is good and use a multi meter and test the Resistance and adjust the new one to that spec as close as you can at the end plate their is a capacitor part # 778958 replace this as well again go a higher volt rating but do not change the MF value with this said and done.your will have a more stable sign wave and beefier circuitry able to hold up better use lock tight on the screws for these.ther is not any control in the box with the plugs just breakers after replacing these parts and there is still no power then the stator is shorted and will need either re-winding or replaced.
hope this helps.

Posted on Sep 01, 2010

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