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Old 11-29-2022, 05:09 AM   #1
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Running gen with load

I've been a pro advocate in running the generator for about 30 minutes a month when the RV sits at home. I also keep the house and cab batteries in a trickle charger.

Why is it necessary to to run the generator "with a load" when it sits at home? Do these generators go bad (the part that produces current/electricity) if it is not used? Seems to me its a electric motor of sorts. I figured running the engine to lubricate the internals and keeping the fuel through the carb was nessesary, but why does it have to have a load? And how much load? Just some lights? A/C?
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Old 11-29-2022, 05:28 AM   #2
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In my opinion, the load is to just pull more fuel through carburetor to keep the cheap fuel from ruining carburetor.
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Old 11-29-2022, 05:34 AM   #3
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My gen is the Cummings, which has an electric fuel pump to prime (and maybe supply fuel to carb?), so fuel to the carb is going to be a non issue. I remove the front cover of the gen, press the prime side of the switch for about 5 seconds, then press the toggle switch to the start/stop, then hold until it starts.

But I've not been going inside and operating electrical "things" to produce a load.
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Old 11-29-2022, 05:54 AM   #4
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A generator needs to have residual magmatism in it to generate electricity. You can combat loss of residual magnetism by always running your generator with a load, once a month, and disconnecting that load before you turn the generator off. I use either the A/C or a small heater for 30 minutes. The load should be about 50% of the generating capacity. So if it is a 30 amp generator make the load about 15 amps.

You can also "Google" Generator Excitation.
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Old 11-29-2022, 06:56 AM   #5
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Load helps clean the brushes on the generator head and also heats up the windings to help remove moisture. Follow the manual.
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Old 11-29-2022, 07:11 AM   #6
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Load helps clean the brushes on the generator head and also heats up the windings to help remove moisture. Follow the manual.
X-2
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Old 11-29-2022, 07:17 AM   #7
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Load helps clean the brushes on the generator head and also heats up the windings to help remove moisture. Follow the manual.

And X3.
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Old 11-29-2022, 11:39 AM   #8
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I have had to replace carburetor twice on Cummings gen because of ethanol!!
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Old 11-29-2022, 06:14 PM   #9
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Load helps clean the brushes on the generator head and also heats up the windings to help remove moisture. Follow the manual.
Here's what my Onan operator's manual says:
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Old 11-30-2022, 05:34 AM   #10
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dyspl same thing I was told after second carburetor! That was twenty years ago.
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Old 11-30-2022, 09:41 AM   #11
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We had a cabin in Minnesota for 30+ years. Same generator, a very tired Generac. End of season we ran it dry, took off the bottom of the carb and dried and cleaned it, took out plug and squirted in a tablespoon of oil then hand turned it over.

But I would not recommend this with more modern generators. Running it keeps it clean in the engine and the windings, etc.
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Old 11-30-2022, 02:22 PM   #12
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Load helps clean the brushes on the generator head and also heats up the windings to help remove moisture. Follow the manual.
Learjet is right. Running a half load works well, I try to run a couple of either heat guns, toaster, any type of resistance load that will match a half or better of the generator output.
If you have a 3000W generator run something that uses 1500 W. Scale up or down accordingly.
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Old 12-01-2022, 05:31 AM   #13
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Thanks for all the explanations. I will start up the generator this weekend with the A/C on, the TV on, then stretch out on the couch and take a 2 hour nap.

When the wife comes to check on me, I'll tell her I'm "exercising the generator".

Lets see how that goes over with her.
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Old 12-01-2022, 11:09 AM   #14
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When the wife comes to check on me, I'll tell her I'm "exercising the generator".

Lets see how that goes over with her.
This is exactly what I do (well, except this time of year, it's running a 1500 watt heater). But I get an hour of "me" time.

I'm going to cut and paste that post about running it for TWO hours and see if I can double my "me" time.
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