151
SYMPTOM:
Engine backfires.
POSSIBLE CAUSES
WHAT TO DO
1. DESS did not read tether cord cap
code. DESS/RER pilot lamp blinks
once every 1.5 seconds.
Engine can not exceed 3000 RPM.
Properly install.
2. DESS has read a different code
,
then
the one programmed. DESS pilot lamp
blinks rapidly (3 times per second).
Engine can not exceed 3000 RPM.
Install a tether cord cap (key) for which
this snowmobile was programmed.
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.
SYMPTOM:
Engine misfires.
POSSIBLE CAUSES
WHAT TO DO
1. DESS did not read tether cord cap
code. DESS/RER pilot lamp blinks
once every 1.5 seconds.
Engine can not exceed 3000 RPM.
Properly install.
2. DESS has read a different code
,
then
the one programmed. DESS pilot lamp
blinks rapidly (3 times per second).
Engine can not exceed 3000 RPM.
Install a tether cord cap (key) for which
this snowmobile was programmed.
3.
Fouled/defective/worn spark plugs.
Clean/verify spark plug gap and identifi-
cation number. Replace as required.
4. Too much oil supplied to engine.
Improper oil pump adjustment, refer to
an authorized SKI-DOO dealer. On pre-
mixed models only, improper fuel/oil
mixture. Drain fuel tank and refill with
appropriate mixture ratio.
5. Water in fuel.
Drain fuel system and refill with fresh
fuel.
mmo2005-002b_1.book Page 151 Monday, February 2, 2004 4:07 PM