A Northstar generator, 10,500 watt. What controls the output voltage

SOURCE: High voltage low cycles

I worked at a tool rental center while going to college and learned how to service generators. Most appliances/tools require 50 to 60 cycles at 110 to 120 v. Your engine was designed to give maximum horsepower at 3600 rpm. Adjust the engine speed to produce 60 cycles and the engine should be at 3600 rpm and producing around 120v max. (Some special generators were designed to produce 230v 180 cycles, check manual) If your generator incorporates capacitors check them for at least 95% of printed uf value. They should be removed from circuit for testing. If there are two caps and one is weak make sure the new cap reads close to value of remaining cap. Finally there is usually a voltage regulator that varies the power to the armature magnet trying to maintain steady voltage depending on amp draw and engine condition. This regulator has no adjustment and is pass or fail type of item. Good luck, enjoy

mamicheddy

• 79 Answers
• Posted on May 12, 2009

SOURCE: No voltage output

It is possible that your voltage regulator is shot but before purchasing the volt regulator try flashing the fields first and make sure the brushes and rings are clean.

SOURCE: Northstar 5500 - no power output, but motor runs fine

Is the Output switch in the "ON" position...the switch is normally on the Outlet manel

Craig Butler

• 1730 Answers
• Posted on Sep 11, 2009

SOURCE: no output voltage at all

The generator needs to be 'flashed' to bring back the excitation for output. Is this something you can do? Let me know and I can help you...

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sal sabea

• 98 Answers
• Posted on Oct 11, 2009

SOURCE: generator voltage too low

check engine speed by the sound...if normal then check AVR card...replace it...
if not normal rase it...