14
(5) Push the choke knob to the OPEN position as the engine warms up, see Fig. 12.
Fig.12 The open position of Choke knob
(6) After normal starting, the genset can be loaded.
4.2 IG4000 starting order：
(1) Break the load and turn the breaker to “OFF” position.
(2) Start genset according to the step 2, 3, 4 and 5 of IG3000 starting order.
(3) After normal running of genset, connect load and turn the breaker to “ON” position.
High altitude operation
At high altitude, the standard carburetor air-fuel mixture will be excessively rich,
engine 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 and readjusting the pilot screws. If you always operate the
generator at altitude higher than 1,500 m (5,000 feet) above sea level, have your
authorized dealer perform these carburetor modifications.
Even with suitable carburetor jetting, engine horsepower will decrease approximately
3.5% for each 305 m (1.000 feet) increase in altitude. The effect of altitude on the
horsepower will be greater than this if no carburetor modification is made.
CAUTION
■ 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.
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