Micro-Air wrote:
Regarding altitude and the Honda EU2000i, we recently worked with 2 different customers who did run into some trouble. Turns out, up to about 3000, all seems okay with the Honda EU2000i. However, we had one customer at 4600' and another at 5300', and they both needed to install the high-altitude carburetor jet kit to get the Honda to keep running after the startup was over with.
NO aftermarket product, Micro-Air Easy Start or any similar device, should be expected to compensate for incorrect jetting. :R This
EU2000i Technical Bulletin makes it quite clear that Honda considers the stock #62 jet suitable only for use up to 5000', between 5000' and 10,000' the next smaller #60 should be used, above 10,000' a #58. For any results to be conclusive one would have to know for a fact that the EU2000i in question was in proper operating condition, not just a unit of "some" age with unknown numbers of hours on it and no known regular maintenance that may or may not have met the manufacturer's specifications.