I've had my EU 2000 for about a year. What a great generator! I've used it
at 8000+ feet, in rain, snow and have left it outside in freezing weather.
Although it is a bit difficult to get started after being cold soaked all
night, it always started and worked like a charm. I think you received a
defective generator. I've used regular gas and higher octane. I normally
run the higher octane in the ATVs every 2-3 tank and use the same gas in the
generator. Hopefully you will have better luck with your unit now that it
is fixed.
Pete