Voltage dropping at higher RPM. Briggs 8k Generator - Power Equipment Forum : Power Equipment Forums
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post #1 of 14 (permalink) Old 11-18-2019, 06:41 PM Thread Starter
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Voltage dropping at higher RPM. Briggs 8k Generator

I have a B&S Elite 8000 generator. Its been sitting for a year in the garage without running. I'd put stablizer in the fuel so the engine started right up.

With the throttle at its lowest setting, I'm getting a solid 130 volts out of the outlets. When I run the throttle up to max, the voltage immediately drops on all the outlets to about 3.7 volts. The only way to get it back up is to shut the engine off and restart. I've tried just shutting the electrical board off and tried to reset the circuit breakers but that doesn't have any effect.

Thoughts? Its got me stumped!

Thanks!
Chris
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post #2 of 14 (permalink) Old 11-18-2019, 08:23 PM
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Originally Posted by Chris Lattin View Post
I have a B&S Elite 8000 generator... With the throttle at its lowest setting, I'm getting a solid 130 volts out of the outlets. When I run the throttle up to max, the voltage immediately drops on all the outlets to about 3.7 volts.
Assuming it's this one: https://images.homedepot-static.com/...04d36eadf7.pdf , it should only be running at 3600RPM. How are you "running the throttle up to max"??? 3600RPM is required to maintain a 60Hz frequency.
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post #3 of 14 (permalink) Old 11-18-2019, 09:14 PM Thread Starter
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No, that's not the one I have. Mine is older. It has a throttle control right next to the choke lever.

Chris



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post #4 of 14 (permalink) Old 11-18-2019, 11:09 PM
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Originally Posted by Chris Lattin View Post
No, that's not the one I have. Mine is older. It has a throttle control right next to the choke lever.
Well, what is the actual model number? Maybe a 030244-2? https://www.google.com/url?sa=t&rct=...pVAKDC7RhNjEdy
Perhaps it was re-powered (or re-carbed) with a non-generator engine? 2-pole generators must run at 3600RPM to generate 60Hz electricity (in North America). Does it have an idle-control switch to idle down the motor when no load exists? It looks like one of your pictures didn't load, so need more info!

Last edited by tabora; 11-18-2019 at 11:24 PM.
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post #5 of 14 (permalink) Old 11-19-2019, 06:15 AM Thread Starter
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Here is the model number

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post #6 of 14 (permalink) Old 11-19-2019, 06:18 AM Thread Starter
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Hmmm....don't know why that pic won't load.

The model number is 030210 Rev 02 66.6 Amps and 8000 Watts
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post #7 of 14 (permalink) Old 11-19-2019, 07:15 AM
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Is this a brush style generator? If it is, test it for brush bounce.

Once you know how a device, system, ect operates, finding the root cause in the event chain is easy. Until then, you will always be chasing/repairing the effects. Learning is a life time event, if you want to outsmart, whatever item you want to repair.
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post #8 of 14 (permalink) Old 11-19-2019, 07:21 AM Thread Starter
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I'd feel a lot more comfortable tearing this apart if I had a service manual.....any ideas where I could get one?
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post #9 of 14 (permalink) Old 11-19-2019, 01:52 PM Thread Starter
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Is this a brush style generator? If it is, test it for brush bounce.

I pulled the brushes off and they "seem" ok.....they weren't loose on the bracket. What else should I check them for? They seemed to be worn a little differently from each other.
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post #10 of 14 (permalink) Old 11-19-2019, 05:50 PM
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The model number is 030210 Rev 02 66.6 Amps and 8000 Watts
In the Owners Manual: https://www.briggsandstratton.com/na..._H_LO.pdf.html
there is no mention of a throttle, and as previously discussed, there should not be one on a generator unless it is an idle-down control (also not mentioned in the manual). Have you owned it since new? Never re-powered? Did you check the RPM? Here's a good link re: troubleshooting your model: https://www.smokstak.com/forum/showthread.php?t=141949

Additional Documents (Sadly, the entire engine is treated as a unit in the documentation):
Quick Start Guide: https://www.briggsandstratton.com/na..._A_LO.pdf.html
Illustrated Parts List: https://www.briggsandstratton.com/na...RL_LO.pdf.html
Wiring Diagram: https://www.briggsandstratton.com/na...CS_LO.pdf.html
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