106
SYMPTOM:
Engine backfires.
POSSIBLE CAUSES
WHAT TO DO
1. DESS has not read tether cord.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks once every 3
seconds, beeper sounds every 3 sec-
onds as well. Properly install tether
cord.
2. DESS is activated.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks rapidly and
beeps are heard. Install appropriate
tether cord.
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.
SYMPTOM:
Engine misfires.
POSSIBLE CAUSES
WHAT TO DO
1. DESS has not read tether cord.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks once every 3
seconds, beeper sounds every 3 sec-
onds as well. Properly install tether
cord.
2. DESS is activated.
Engine can not exceed 3000 RPM.
DESS pilot lamp blinks rapidly and a
continuous beep is heard. Install ap-
propriate tether cord.
3. Fouled/defective/
worn spark plugs or wrong gap.
Clean/verify spark plug and heat range.
Replace as required.
4. Too much oil supplied to engine.
Improper oil pump adjustment, refer
to an authorized SKI-DOO dealer.
5. Water in fuel.
Drain fuel system and refill with fresh
fuel.
Mmo2002-003a.book Page 106 Friday, February 2, 2001 1:47 PM
