Polaris 2011 Widetrak LX - Manual (Page 57)

53
OPERATION
Carburetion
Jetting Guidelines
Changes in altitude and temperature affect air density, which is the
amount of oxygen available for combustion. In low elevations and cold
temperatures, the air has more oxygen. In higher elevations and higher
temperatures, the air is less dense.
The carburetors are calibrated for an altitude of 0-2000 ft. (0-600 m) and
ambient temperatures of -15_ to +5_ F. (-26_ to -15_ C). Carburetors
must be re-calibrated if the snowmobile is operated outside this produc-
tion temperature and/or altitude range. The main jet installed in produc-
tion is not correct for all altitudes and/or temperatures.
NOTICE: A main jet that’s too small will cause a lean operating condition and
may cause serious engine damage. Jet the carburetors carefully for
elevation and temperature according to the jetting charts. Refer to
your Owner’s Manual Supplement.
It’s the owner’s responsibility to ensure that the correct jets are installed
in the snowmobile for a geographical area. Be very careful when jetting
down in warm weather. As the weather turns colder it will be necessary
to re-jet upward to prevent engine damage. When selecting the proper
main jet always use the lowest elevation and temperature that is likely to
be encountered.