High Altitude Setting - Polaris 550 Indy Owner's Manual

OPERATION
Electronic Reverse (PERC)
Disengaging Reverse
1. Stop the snowmobile and leave the engine idling.
NOTICE: Engaging the starter when the engine is running WILL result in serious
engine damage, especially if the transmission is in reverse. Never
engage the starter when the engine is running.
2. Push the yellow reverse button for one second and release. The
engine will slow and begin to rotate forward. The light on the
instrument panel will shut off.
3. Apply the throttle slowly to make sure the transmission is in
forward.

High Altitude Setting

At altitudes above 6000 feet (1800 m), the engine will require a different
ignition setting to improve the success of the reverse system. To set for a
higher altitude, start the engine and hold the reverse button down until
the light on the instrument panel flashes rapidly, then release the button.
To set the reverse for lower elevations, continue holding the button
down until the reverse indicator light blinks slowly. Once set, it's stored
in memory until changed, whether the machine is running or not.
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