I have a Champion 4000 generator that I use to run the AC on my fifth wheel. It doesn't run at a constant speed unless I have the choke just slightly closed. I cleaned the carb, lines and tank. But, it still runs that way. I noticed that you can put the long spring on top of the carb in different holes would that change anything. I runs fine otherwise and will run all day long with the choke closed slightly.Anything else I should look at?Bob

I am sure you are aware that when the load changes the speed will change correct? just checking

Yes, I understand that. When I turn the choke all the way off the rpm's fluctuate up and down quickly.Bob

Have you cleaned and lubricated, if needed, the linkages between the carb and the governor? Friction in that mechanism could lead to hunting, particularly under light load.

It is probably lean. Unfortunately, this may not be adjustable so you may have to go into the carburetor again and clean the main jet and related passages. Matt

Matt,I'll try lubing all the linkages. I've had the carb apart a number of times and soaked in carb cleaner, cleaned all the passages and blown them out with air.BobMatt_Colie wrote:It is probably lean. Unfortunately, this may not be adjustable so you may have to go into the carburetor again and clean the main jet and related passages. Matt

Generator doesn't run at constant speed? | Good Sam Community

18 Replies

hawkeye-08
Explorer III
Jun 08, 2015
I suggest trying some Seafoam in the gas. I use a combo of Seafoam and Lucas injector cleaner to keep my carb clean.
SoundGuy
Explorer
Jun 08, 2015
dave17352 wrote:
I am sure you are aware that when the load changes the speed will change correct? just checking

Huh? :h Assuming the OP's genset is a synchronous model and not an inverter model which does vary speed according to load then it should run at a constant speed of 3600 rpm ... after all, that's how a synchronous genset derives it's 60 Hz frequency, unlike an inverter model in which the inverter itself creates that 60 Hz signal regardless of engine speed. If this is indeed a synchronous genset that is varying in speed then it needs servicing.
Reddog1
Explorer II
Jun 08, 2015
I'm thinking you still have something in the carb. I have had to clean a couple of small engines several time before I finally got it right.

Wayne
unioncreek
Explorer
Jun 08, 2015
Matt,

I'll try lubing all the linkages. I've had the carb apart a number of times and soaked in carb cleaner, cleaned all the passages and blown them out with air.

Bob

Matt_Colie wrote:
It is probably lean. Unfortunately, this may not be adjustable so you may have to go into the carburetor again and clean the main jet and related passages.

Matt
Matt_Colie
Explorer II
Jun 08, 2015
It is probably lean. Unfortunately, this may not be adjustable so you may have to go into the carburetor again and clean the main jet and related passages.

Matt
DrewE
Explorer II
Jun 08, 2015
Have you cleaned and lubricated, if needed, the linkages between the carb and the governor? Friction in that mechanism could lead to hunting, particularly under light load.
unioncreek
Explorer
Jun 08, 2015
Yes, I understand that. When I turn the choke all the way off the rpm's fluctuate up and down quickly.

Bob
dave17352
Explorer
Jun 08, 2015
I am sure you are aware that when the load changes the speed will change correct? just checking

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Generator doesn't run at constant speed?

18 Replies

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