Champion Power Equipment 75531i - Manual (Page 15)

REV 75531i-20130220
12
75531i ENGLISH
OPERATION
Operation at High Altitude
The density of air at high altitude is lower than at sea
level. Engine power is reduced as the air mass and air-
fuel ratio decrease. Engine power and generator output
will be reduced approximately 3½% for every 1000
feet of elevation above sea level. This is a natural trend
and cannot be changed by adjusting the engine. At high
altitudes increased exhaust emissions can also result
due to the increased enrichment of the air fuel ratio.
Other high altitude issues can include hard starting,
increased fuel consumption and spark plug fouling.
To alleviate high altitude issues other than the natural
power loss, Champion Power Equipment can provide a
high altitude carburetor main jet. The alternative main
jet and installation instructions can be obtained by
contacting Customer Support. Installation instructions
are also available in the Technical Bulletin area of the
Champion Power Equipment internet site.
The part number and recommended minimum altitude
for the application of the high altitude carburetor main
jet is listed in the table below.
In order to select the correct high altitude main jet
it is necessary to identify the carburetor model. For
this purpose, a code is stamped on the side of the
carburetor. Select the correct main jet part number
corresponding to the carburetor code found on your
particular carburetor.
Operation using the alternative main jet at elevations
lower than the recommended minimum altitude can
damage the engine. For operation at lower elevations, the
standard main jet must be used. Operating the engine
with the wrong engine configuration at a given altitude
may increase its emissions and decrease fuel efficiency
and performance.
WARNING
Carburetor
Code
Main Jet Part Number Altitude
P20-2-H
Standard 83.131017.01.H
3500 Feet
(1067 Meters) Altitude 83.131017.01.01.H
P20-2-R
Standard 83.131017.01.R
Altitude 83.131017.01.01.R