Using Micro-Air EasyStart unit on rooftop AC

[noteven]

I'm thinking about adding a Coleman Mach 8 9,200  roof AC equipped with a Micro-Air EasyStart to my truck camper so I can use a single Honda 2000i generator to run it.  I am not quite clear as to what altitude, humidity & ambient temperature the Honda will be capable of operating the above configured AC unit. 

Any comments from people using generator powered AC at higher altitudes will be appreciated. 

[Ron]

We have a 13.5 K BTU AC and we're able to operate it with our 3KW Yamaha Generator.  We've never tried to operate it at high elevations; usually when we're in the mountains we just don't need it.  We have used it at 3,000 or 4,000 feet without problems.  I do know that I can tell our generator has significantly less power at high elevations.  I've read that gasoline generator power needs to be derated by 3% per 1,000 feet above sea level.  I guess if our generator (50% more power than yours) can operate our AC (47% higher BTU than yours) then I suspect you'll be okay up to 4,000 feet for sure but I seriously doubt you'll be able to operate it above 6,000 feet.

[Shawn Patterson]

I don't have any personal experience with this generator, but from some quick investigation it sounds like you will need to re-jet the carb if you are going over 4000 ft of elevation.  Even with re-jetting, there is a power de-rate on the engine.  Here is a quote from a Honda PDF file on the subject:

"Even with carburetor modifications, engine horsepower will decrease around 3.5% for each 1,000-foot (300 meter) increase in elevation. When the carburetor is modified for high elevation operation, the air-fuel mixture will be too lean for low elevation use. Operation at elevations below 5,000 feet (1,500 meters) with a modified carburetor may cause the engine to overheat, and result in serious engine damage."