Pramac Powermate PMi1000 Manual Del Usuario página 47

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Operation at high altitudes
At high altitudes, the standard carburetor air and fuel mixture will become
excessively dense, causing the decrease of the engine's functions, and
increase of fuel consumption. To enhance the performance of the engine in
high-altitude areas, you can make special adjustments to carburetor. If you use
the engine at an altitude of over 1500meters (5000 feets), please ask the
authorized agent to modify the carburetor.
Even though you use the proper nozzle, the horsepower of the engine will still
decline 3.5% as the altitude increases every 300meters (1000 feets). If these
adjustments are not made, the altitude will have greater influence on power.
Look out
The nozzle of the engine is designed for normal altitude areas. If it is put to use
in higher altitudes, the outputting power may decline and become too hot, and
even the engine will be damaged seriously because the ratio of the air and
burning fuel is too low.
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