| NOTICE |
| Making non-recommended adjustments could result in vehicle or engine
damage as well as denial of warranty claims. Your Polaris
dealer can assist with any
carburetor adjustments. |
Proper carburetor
adjustment is critical. A lean mixture (too much air, too little fuel)
may result in piston burning, bearing
failure, or complete engine failure. A rich mixture
(too much fuel, too little air) may foul plugs and cause generally
poor
engine performance.
A lean mixture may
be caused by things like fuel line restrictions, foreign matter in
the carburetor or clogged fuel filters.
A rich mixture may be caused by snow build-up on the
pre-filter in the air intake system. Either condition may be caused
by
improper carburetor adjustment.
Jetting Guidlines
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.
All carburetors
have been pre-set at the factory to the settings
indicated by the shaded cells of the jetting chart on page 113. Carburetors
must be re-calibrated if the snowmobile is operated
outside this production temperature and/or altitude range. The main
jet
installed in production is not correct for all altitudes
and/or temperatures. The number stamped in the end of the main jet
indicates the jet size that was installed at the
time of manufacture.
| NOTE |
| Using non-recommended jets and/or needles can result in shorter engine
life, lower fuel economy, increased emissions and poor
performance and drivability. |
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.
