Re: ef3000iSEB: fluctuating engine speed in economy mode w/no load

I would revisit the carb clean and make sure main jet and pilot jet are removed for cleaning, along with the main nozzle and placed in a small container and left in combustion chamber cleaner overnite, after which they should be blown out with compressed air and held up to the light to ensure they are clear through, carb body should also be sprayed up liberally with combustion chamber cleaner and left overnite before blowing out and reassembly.Another thing you may wish to check for is any intake leaks. when your generator is idling try spraying the carb intake area with WD40 and see if there is any change in the idle speed, this would indicate an intake leak.
Good luck.