146
SYMPTOM: Engine lacks acceleration or power.
POSSIBLE CAUSES WHAT TO DO
1. DESS did not read cap code.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks once every 1.5
seconds. Properly install tether cord cap.
2. DESS has read a different code
then the one programmed.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks rapidly (3 times
per second). Install a cap (key) for which
this snowmobile was programmed.
3. Fouled or defective spark plug. Check item 5 of “Engine turns over but
fails to start”.
4. Lack of fuel to engine. Check item 4 of “Engine turns over but
fails to start”.
5. Carburetor adjustments. Contact an authorized SKI-DOO dealer.
6. Drive belt worn too thin. If the drive belt has lost more than
3 mm (1/8 in) of its original width, it
will affect vehicle performance.
7. Drive and driven pulleys require
servicing.
Contact an authorized SKI-DOO dealer.
8. Engine is overheating. Check coolant level, pressure cap, ther-
mostat and for air locks in cooling system.
SYMPTOM: Engine backfires.
POSSIBLE CAUSES WHAT TO DO
1. DESS did not read cap code.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks once every 1.5
seconds. Properly install tether cord
cap.
2. DESS has read a different code
then the one programmed.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks rapidly (3 times
per second). Install a cap (key) for which
this snowmobile was programmed.
3. Faulty spark plug
(carbon accumulation) or wrong gap.
See item 5 of “Engine turns over but
fails to start”.
4. Engine is running too hot. See item 8 of “Engine lacks accelera-
tion or power”.
5. Ignition timing is incorrect or there
is an ignition system failure.
Contact an authorized SKI-DOO dealer.
Mmo2003-003a.book Page 146 Tuesday, March 19, 2002 2:22 PM
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