Generator at High Altitude

Chances are that your generator will work fine @ +-5000' MSL without changing the jet. However, you may experience a few anomalies over time. Using the low altitude jet at higher elevations WILL cause the air/fuel mixture to be rich of stoichiometric. That will cause the exhaust to contain excessive unburned hydrocarbons and carbon monoxide and it may carbon up over time. The generator will use more fuel than necessary. You may also experience occasional spark plug fouling and the lubricating oil may become fuel saturated. If you change the jet, make sure you change it back if you descend in altitude and use the generator. If you don't and use the generator under higher/full load, the generator will now run lean causing excessive cylinder head/exhaust gas temperatures which may cause engine damage.

Chum lee