Think I got it!! I bought Sea Mist Carb cleaner and ran two cycles of cleaning:
Warm up generator, add about 3 ounces of Sea Mist to a gallon of gas. Run for 15 minutes. Let rest for 1/2 hour. Run again for 20 minutes.
After first cleaning cycle, the Yamaha EF2000si, with all breakers on and fuses in and battery hooked up, ran for about a minute before stalling.
After a second cleaning cycle, the generator ran non-stop, except stalled after a minute when ECO mode turned on. Started again and it kept running, even with ECO.
I'm going to do one more cleaning cycle today for good measure.
I highly recommend Sea Mist to clean the carb. I'll commence to use it before each season from now on!
Thanks for all comments.
Ed
