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Onan Emerald 4000 BGE help!


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  #11  
Old 07-06-2017, 09:01:26 PM
KPack KPack is offline
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Default Re: Onan Emerald 4000 BGE help!

It sounds pretty good but sounds like rpm is high. Should be 1860 no load.
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Old 07-06-2017, 09:06:40 PM
bigGURN bigGURN is offline
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Default Re: Onan Emerald 4000 BGE help!

It currently has no exhaust. It sounds fast, but it could be that. I'll check it though once the exhaust is mounted.
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Old 07-15-2017, 10:30:42 PM
bigGURN bigGURN is offline
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Default Re: Onan Emerald 4000 BGE help!

All together on a cart and ready to go. With the exhaust it is so much quieter. Checked the output and it was spot on, so looks like the engine speed is correct.


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Old 07-15-2017, 11:03:54 PM
slip knot slip knot is offline
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Default Re: Onan Emerald 4000 BGE help!

I'm liking the fuel cell in the first video.
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Old 07-15-2017, 11:05:24 PM
bigGURN bigGURN is offline
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Default Re: Onan Emerald 4000 BGE help!

necessity... the mother of all invention?
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Old 07-16-2017, 02:08:36 PM
zuhnc zuhnc is offline
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Default Re: Onan Emerald 4000 BGE help!

I think with the electronic voltage regulator, proper voltage output is NOT dependent upon speed. Check speed with a Kill-A-Watt device or other frequency-measuring device. Still could be running too fast, with proper output voltage.
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Old 07-16-2017, 02:23:40 PM
len k len k is offline
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Default Re: Onan Emerald 4000 BGE help!

If it had 8 inch transformer (voltage booster) by starter (spec A-C) then voltage is proportional to speed.

You have electronic voltage reg. So voltage is independent of speed, unless hz is real low, like 50 hz. Then some aftermarket electronic voltage regs reduce voltage to try to help a heavily loaded engine come back up to speed
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Old 07-20-2017, 11:01:39 PM
bigGURN bigGURN is offline
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Default Re: Onan Emerald 4000 BGE help!

She's ready to go! Decided to go mobile with it. Really has been a fun side project, and I learned a lot, which is something that I love to do! I was even able to use some of what I learned to repair our old Toro T500 Generator that had some filthy slip rings! Thanks so much for all of the input and assistance provided here!
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  #19  
Old 08-09-2017, 01:56:18 PM
bigGURN bigGURN is offline
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Default Re: Onan Emerald 4000 BGE help!

So... everything works great... except I am not charging the battery. Is there a separate regulator for 12v?
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  #20  
Old 08-09-2017, 02:33:00 PM
Kevin K Kevin K is offline
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Default Re: Onan Emerald 4000 BGE help!

There should be a battery charge winding in the generator. The BGE's sold for motor homes had a rudimentary charging system consisting of a bridge rectifier and a resistor. It wasn't even really a charging system, more like something to keep the battery from discharging with the generator running. The battery charge function was provided by the battery maintainer in the coach. The BGD's sold for industrial or bucket truck use usually had a regulator/rectifier to take care of battery charging.

If you provide a full model number maybe we can pull up a wiring diagram.
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