38
RER Modification at High Altitude
General
At high altitude, the RER system needs a different engine timing
curve to work properly.
Operation
Fan-Cooled Models
Before using vehicle at high altitude see an authorized SKI-DOO deal-
er for installation of a high altitude cap. Fan-cooled Summit models
are already equipped with high altitude cap.
10) Start/RER Button
General
The START/RER button has two functions.
When the engine is not running
, depressing the START/RER button
will engage the electric starter on vehicle so equipped and start the
engine.
When the engine is running
, depressing the START/RER button will
command the engine to reverse crankshaft rotation as driving the
snowmobile in reverse is achieved by changing the direction of rota-
tion of the engine, not by shifting the chaincase in reverse gear.
When depressing the START/RER button, the MPEM (Multi-Purpose
Electronic Module) will practically slow down the engine RPM to a
stop and advance the ignition timing to cause crankshaft rotation re-
versing.
Engine will automatically shift into forward when starting after stop-
ping or stalling.
Shifting procedure will take place only when the engine is running.
If engine is running at a speed above 3800 RPM, the reverse function
of the START/RER button is cancelled.
It is recommended to warm up the engine to its normal operating
temperature before shifting.
Mmo2003-003a.book Page 38 Tuesday, March 19, 2002 2:22 PM
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