16 Operator’s Manual
HIGH ALTITUDE
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. Operation at an altitude that differs
from that at which this engine was certied, for extended
periods of time, may increase emissions.
High altitude performance can be improved by specific
modications to the carburetor. If you always operate your
generator at altitudes above 5,000 feet (1,500 meters),
have your dealer perform this carburetor modication. This
engine, when operated at high altitude with the carburetor
modications for high altitude use, will meet each emission
standard throughout its useful life.
Even with carburetor modification, engine horsepower
will decrease about 3.5% for each 1,000-foot (300-meter)
increase in altitude. The effect of altitude on horsepower will
be greater than this if no carburetor modication is made.
NOTE: