mountaintraveler wrote:
I had run it from sea level to around 8000ft. My manual says that running it with higher altitude setting at low altitude will damage the generator. Not sure about the other way, but its supposed to sputter, surge, run poorly if altitude is high and isn't set in the generator. May be its not noticeable with newer generator in top shape.
This is how the above works. Your generator needs a mixture of fuel and air in the correct ratio of air to fuel to work properly (14.7 parts of air to 1 part of fuel is correct).
Say you set that mixture at sea level. Now when you go up to 8,000 feet there is less air. So if you make no changes then you might have 8 parts of air to 1 part of fuel. (that ratio is completely made up but the point is still valid). There ratio has too much fuel and not enough air. That is known as a rich condition which can cause sputter surge and loss of power. But it doesn't destroy the engine.
However, if you are at 8,000 feet elevation and you set your generator correctly so it has a 14:1 ratio everything is fine and your generator is happy. But when you go back to sea level there is a whole bunch more air. So you might now have a ratio of 20:1 (20 parts of air to each part of fuel) That is known as a lean condition and is very bad. When an engine is running lean it is running hot and can destroy itself in a short amount of time.
