Ski-Doo 2000 Mach 1, Operator'S Manual

Page: 115 / 123

113
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
seconds 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)
See item 5 of “Engine turns over but
fails to start”.
4. Engine is running too hot. See item 8 of “Engine lacks
acceleration or power”.
5. Ignition timing is incorrect or there
is an ignition system failure.
Contact an authorized dealer.
SYMPTOM:
Engine misfires.
POSSIBLE CAUSES WHAT TO DO
1. DESS has not read tether cord.
Engine can not exceed 2500 RPM.
DESS pilot lamp blinks once every 3
seconds, beeper sounds every 3
seconds as well. Properly install
tether cord.
2. DESS is activated.
Engine can not exceed 2500 RPM.
DESS pilot lamp blinks rapidly and a
continuous beep is heard. Install
appropriate tether cord.
3. Fouled/defective/
worn spark plugs.
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 dealer.
5. Water in fuel. Drain fuel system and refill with fresh
fuel.
Mmo2000-004b.book Page 113 Monday, May 10, 1999 9:13 AM