Ski-Doo EXPEDITION TUV, Operator'S Manual

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ENGINE BACKFIRES (cont’d)
2. DESS has read a different tether cord cap (DESS key) code than the one
programmed. DESS pilot lamp blinks rapidly (3 times per second). En-
gine can not exceed 3000 RPM.
– Install a tether cord cap (DESS key) for which this snowmobile was pro-
grammed.
3. Faulty spark plug (carbon accumulation).
– See item 5 of ENGINE TURNS OVER BUT FAILS TO START.
4. Engine is running too hot.
– See item 6 of ENGINE LACKS ACCELERATION OR POWER.
5. Ignition timing is incorrect or there is an ignition system failure.
– Contact an authorized SKI-DOO dealer.
ENGINE MISFIRES
1. DESS did not read tether cord cap (DESS key) code. DESS pilot lamp
blinks once every 1.5 seconds. Engine can not exceed 3000 RPM.
– Properly install tether cord cap (DESS key).
2. DESS has read a different tether cord cap (DESS key) code than the one
programmed. DESS pilot lamp blinks rapidly (3 times per second). En-
gine can not exceed 3000 RPM.
– Install a tether cord cap (DESS key) for which this snowmobile was pro-
grammed.
3. Fouled/defective/worn spark plugs.
– Clean/verify spark plug gap and identification number. Replace as required.
4. Too much oil supplied to engine (2-stroke).
– Improper oil pump adjustment, refer to an authorized SKI-DOO dealer.
5. Water in fuel.
– Drain fuel system and refill with fresh fuel.
SNOWMOBILE CANNOT REACH FULL SPEED
1. DESS did not read tether cord cap (DESS key) code. DESS pilot lamp
blinks once every 1.5 seconds. Engine can not exceed 3000 RPM.
– Properly install tether cord cap (DESS key).
2. DESS has read a different tether cord cap (DESS key) code than the one
programmed. DESS pilot lamp blinks rapidly (3 times per second). En-
gine can not exceed 3000 RPM.
– Install a tether cord cap (DESS key) for which this snowmobile was pro-
grammed.
3. Drive belt.
– Check item 6 of ENGINE LACKS ACCELERATION OR POWER.
4. Incorrect track adjustment.
– See MAINTENANCE and/or an authorized SKI-DOO dealer for proper align-
ment and tension adjustments.
5. Pulleys misaligned.
– Contact an authorized SKI-DOO dealer.
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