Cobra IG20SI User Manual page 15

CHOKE KNOB
NOTE
If the generator stops and can not restart, check
the oil level firstly.
Carburetor Modification for High Altitude
Operation
At high altitude, the standard carburetor air-fuel
mixture will be too rich. Performance will
decrease, and fuel consumption will increase. A
very rich mixture will also foul the spark plug and
cause hard starting.
If the generator operates at high altitude, change the
main nozzle or adjust the idling screw of carburetor
If the generator always operates at altitude above
1000 meters contact an authorized Cobra service
dealer to modify the carburetor.
Generator output power should be modified
according to the altitude and ambient temperature.
The correction factor refers to 13.2
WARNING
If the carburetor has been modified for high altitude
operation, the air-fuel mixture will be too lean for low
altitude use. Operation at low altitude may cause the
engine to overheat and result in serious engine
damage. The carburetor needs return to original
specifications.
<<15>>