Operators Manual

13
ENGLISH 66520
OPERATION
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
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 semi-trash
pump 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
Code
Main Jet Part Number Altitude
P19-1-H
Standard 26 .131017. 0 0. H
3500 Feet
(1067 Meters)
Altitude 26.131017.00.01.H
P19-1-Z
Standard 26 .131017. 0 0. Z
Altitude 26 .131017. 0 0.01.Z
P19-1-Y
Standard 26 .131017. 0 0.Y
Altitude 26.131017.00.01.Y