Operation At High Altitudes - Champion Power Equipment 76520 Owner's Manual & Operating Instructions

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 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 .
Carburetor
Main Jet
Code
Standard
P19-1-Z
Altitude
WARNING
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 .
13
REV 76520-20120824
Part Number Altitude
ST168F-2-1131000-17Z
6000 Feet
(1800 Meters)
468 . 1 31017 .01
76520
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