Polaris P3000iE manual Operation, High Altitude Use, Carburetor Modification

OPERATION

High Altitude Use

Carburetor Modification

When carburetor has been modified for high altitude operation, the air- fuel mixture will be too lean for low altitude use and may cause engine damage.

At high altitude, the standard carburetor air-fuel mixture will be excessively rich. Performance will decrease and fuel consumption will increase. A very rich mixture will also foul the spark plug and cause hard starting. Operation at an altitude different than that which this engine was certified, for extended periods of time, may increase emissions.

High altitude operation can be improved by specific modifications to the carburetor. If always operating the generator at altitudes above 1500 meters (5000 feet), have an authorized POLARIS servicing supplier perform the carburetor modification. The engine will meet each emission standard throughout its life when operated at high altitude with the carburetor modifications for high altitude operation.

With the carburetor modification, engine horsepower will decrease by about 3.5% for every 300 meters (1000 feet) increase in altitude. The effect of altitude on horsepower will be greater if no carburetor modification is made.

Operation of the generator at an altitude lower than the carburetor is jetted for may result in reduced performance, overheating, and serious engine damage caused by an excessively lean air/fuel mixture. Be sure to have any modification reversed at lower altitudes.

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