General XG8000E low voltage

Portable standby generator troubleshooting and repair questions. (Gasoline, diesel, propane, natural gas)
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C4814
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I have a Gasoline portable Generac XG8000E generator that has low voltage output on each leg is (75 volts) with no load. The generator model number is 0061110 and serial number is 7048455.. The engine model number is 0J2533 and serial number is 8680138 12096. I checked the capacitor and it’s good. The voltage at the capacitor has 220 volts with no load on it.

Any suggestions on what I should check next? I greatly appreciate any recommendations.
Denis
C4814
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I just pulled lifted one wire on the capacitor and started it up to take voltage readings. No output voltage at all on the 120vac and 240 vac plugs. Plugged the capacitor wire back in and had 75 volts per leg on the 120 vac plugs and 155 vac on the 240 plug. And 230 volts across the capacitor.


What do I check next? I believe these readings confirm the capacitor is working. I appreciate input from anyone.
murphy
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Measure the value of the capacitor. They go down in value as they age.
For example the capacitor in my A/C compressor is supposed to be 45 mfd. When I finally go around to changing it it measured 0.7 mfd.
C4814
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Thanks for the suggestion. I measured the capacitance and it measured 46 uF. That’s the rating on the capacitor.

I measured the frequency on the receptacle and it was 66 to 70 hz. That’s high.

I’m at a lost. Anybody has any suggestions I would appreciate it. Thanks
Bassguitarist1985
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Frequency is directly correlated to engine speed. Should be a screw above the recoil housing you can turn CCW to reduce to no more than 62.5hz no load.

Where are you measuring voltage? If at the outlets you may have an issue there. Try measuring at the spade connectors leading out of the stator going to the outlet panel. If you get full voltage there then the issue exists in the outlet panel somewhere.
TexasPyro
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I have the same generator with the exact same problem. I have torn the thing apart to troubleshoot it, even have a thread here on it and have had no luck. I have the service manual and have measured and trouble shot all over the place, everything tests as it should. I find it interesting that we both get 230v at the cap and for some reason only 75v at the panel.

Maybe between the two of us we can figure something out. I really don't want to spend $2k on a new one, especially since mine only has about 100hrs on it
murphy
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Are you using a true R.M.S meter to measure voltage? That's required for a generator.
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