You may all know this but if you didn't get a manual with your Honda EU 2000is I hope this helps.
When you first start your generator, the green LED that indicates it's working will flash. (Or is supposed too).
One flash, 100 hours of operation, two flashes at 200 hours, etc all the way to five flashes.
No flash, under 100 hours.
I don't see this mentioned in the EU3000 manual, so I don't think it applies there.
BTW, I was at the Honda store and the repair man said Bush Gardens uses red generators and they calculate they are good for 200,000 hours.