Alpha Technologies AlphaGen ACX2000i 120V - Operator's Manual - Manual (Page 13)

13 041-036-B000-001, Rev. A (07/2013)
2.5 High Altitude Operation
At higher altitudes, the standard carburetor air-fuel mixture will be excessively rich. Performance will
decrease, and fuel consumption will increase.
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 6000 feet (1800 m) above sea level, have an
authorized Alpha service center 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 effect of altitude on the horsepower will be greater than this if no
carburetor modification is made.
Reverse any carburetor modification before operating at lower altitudes. 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.
CAUTION!
2.6 Operating at Extreme Temperatures
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
0° to 113° F (-18° to 45°C). Although the generator can operate at 0° F (-18° C) it will be necessary to use a
lower viscosity engine oil such as SAE 0W-40. Synthetic oil is recommended for temperatures below 32° F.
Even with cold weather oils, the engine will be more difficult to start.
In very cold weather the engine will actually take longer than normal to warm up because the oil is thinner and there
is less internal friction throughout the warm up period. Once the engine reaches operating temperature 0W-40 oil is
no thinner than straight 40W.
NOTE:
• Do not operate the generator when the ambient temperature is below 0°F (-18°C).
• Do not operate the generator when the ambient temperature exceeds 113°F (45°C).
CAUTION!
2.0 Operation
Recommended Oil
SAE 0W-40 SAE 10W-40
0° F 32° F 113° F
(-18° C) (0° C) (45° C)
Figure 2-4, Temperature Range and OilTypes