Question about Northstar Generator 9 Hp, 5500 Watt, Gasoline

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North Star 5500/ lost one leg of the 220v

The generator now only has an output of 110v, should have 220v . Half of the 220v plug works and one of the 110v outlets work. There are no opens in the electrical box, both breakers have continuity. The diodes have a normal apperance, they don't look burnt. Any thing I can check for except brushes? The generator has less than 50 hours on it.
thanks!
Keith

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Small generators like this almost always have 2 stator windings 180 degrees out pf phase, that's how it makes the 220.
At the back (maybe side) of the outlet box should be a molex type plug that has the wires from the stator, get an ohm meter and measure them (with the generator shut off of course). You should find that you've got 4 wires in the plug, 1 wire for each end of 2 coils. From one end to the other of each coil you should measure less than an ohm, between the coils there is usually no connection, but some models have the neutral ends of each coil connected together inside the generator housing.

It sounds to me like you've got one of the power windings open...

Carl

Posted on Dec 05, 2008

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Or you can open the stator from the engine and then clean the roter and the stator properly with cotten cloth soaked in gasoline then let it dry Sometimes it is self exitation problems due to some particals sucked inside the alternator gap between roter and stator.

Posted on Aug 12, 2012

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