Onan generator

Annies song · Oct 19, 2015

I have an onan 8kw generator that I just re- built the engine on. It's all back together but I am only getting 25 volts out of each 120 leg. I was told that I need to re-excite the magnets or the regulater. Any thoughts?

RT Firefly · Oct 19, 2015

Greetings,
Welcome aboard.

Ski in NC · Oct 19, 2015

25v should be enough to get exciter to build volts. Are all the connections on the transformer and rectifier and exciter stator hooked up right? Did you take apart the electrical end for the rebuild or leave it in place?

Annies song · Oct 19, 2015

I took it all apart

Annies song · Oct 19, 2015

All the wires seem to be hooked up correctly

Ski in NC · Oct 19, 2015

Double check the connections on transformer. Easy to mix them up.

Annies song · Oct 19, 2015

I will double check

Toolbuddie · Oct 19, 2015

Does it have an adjustable Voltage Regulator?

Annies song · Oct 19, 2015

It does not

Ski in NC · Oct 19, 2015

It's transformer regulated. Also a bridge rectifier between transformer and exciter stator. Check that transformer and other AC lead go on AC terminals on rectifier, and F1 and F2 go to the + and - .

Check rectifier, it is really four diodes cast into one block. Between each set of prongs is a diode, should only conduct one way.

Annies song · Oct 19, 2015

I will ck thanks

Onan generator

Annies song

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RT Firefly

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Ski in NC

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Annies song

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Ski in NC

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Annies song

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Toolbuddie

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Annies song

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Ski in NC

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