Jetting Guidelines

Content Source: 2020 600R Owner’s Manual (9929778 R01) > Operation Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

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Jetting Guidelines

Changes in altitude and temperature affect air density, which is the amount of oxygen available for combustion. In low elevations and cold temperature, the air has more oxygen. In higher elevations and higher temperature, the air is less dense.

The carburetors are calibrated for an altitude of 0–2000 ft. (0–600 m) and ambient temperature from +15°F to +35°F. (-9° to +2°C.). 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.

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 for your vehicle.

TIP

Always ensure that the correct jets are installed in the machine for the geographical area of operation. 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.