14 PH1000i OM 2010-07-13
4.2 High altitude operation
At higher altitudes, the standard carburetor air-fuel mixture will be excessively rich. Performance will
decrease, and fuel consumption will increase. Power output will decrease 3.5% for each 1000 feet (305 m)
above sea level.
High altitude performance can be improved by installing a smaller diameter main fuel jet in the carburetor. If
you always operate the generator at altitudes higher than 5000 feet (1500 m) above sea level, have your
authorized dealer install a high altitude main jet.
Even with suitable carburetor jetting, engine horsepower will decrease approximately 3.5% for each 1000
feet (305 m) increase in altitude. The affect of altitude on the horsepower will be greater than this 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.
Temperature
High temperature adversely affects generator operation. Generator performance will decrease 1% for each
10°F (5.5°C) increase in temperature above 85°F (29°C). The normal operating range of this generator is
-20° to 113° F (-29° to 45°C).
■
Do not operate the generator when the ambient temperature is below -20°F
(-29°C).
■
Do not operate the generator when the ambient temperature exceeds 113°F
(45°C).
