Why do my eu2000s surge in Eco?
Both of my Honda eu 2000s are 15 years old and I've suffered carb problems by not properly maintaining them. However, I followed a very good post on this site and rebuild the carbs, essentially cleani...
Forum Discussion
enblethen wrote:
Did any of you read the manual I referenced?
It could be normal as you should not run in ECO mode.
well, OP says little or no load and the big clue.. "If I use a little choke it runs ok". That says
1) it isn't a load variation
2) the engine is running lean, which with the 2000 is a big indicator of a partially clogged pilot, idle jet, or whatever you want to call the low speed jet. When that happens the engine surges, rpm drops, throttle control opens the venturi to raise Rpm, that means more fuel through main jet, rpm goes above the eco limit, throttle reduces venturi, main jet drops flow, engine rpm drops to low
repeat, till you replace or get the pilot jet cleaned.
basically same symptoms I and others have had with plugged idle jet. And on the 2000, at least mine, it is a plastic jet with an extremely small orifice that is just about impossible to clean with a tool. either replace or use a good cleaner.
