Operating instructions

88
Engine Misfires, Misinjects, Runs Irregularly
Engine Smoke
Engine Overheats
Engine Continually Backfires
Engine Pinging or Knocking
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Weak spark.
• Fouled/defective/worn spark
plugs.
Replace.
• Faulty ignition coil(s) or EMS
ECU.
Refer to an authorized Sea-Doo
dealer.
Lean fuel mixture.
• Fuel: Level too low, stale or water-
contaminated.
Siphon and/or refill.
• Clogged injectors.
Refer to an authorized Sea-Doo
dealer.
• Defective sensor or EMS
ECU.
Refer to an authorized Sea-Doo
dealer.
Rich fuel mixture
(high fuel consumption).
• Defective sensor or EMS
ECU.
Refer to an authorized Sea-Doo
dealer.
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
• Oil level too high.
Refer to an authorized Sea-Doo
dealer.
• Internal engine damage.
Refer to an authorized Sea-Doo
dealer.
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
• Engine coolant level too low.
Refer to LIQUIDS.
• Clogged jet pump water intake.
Clean.
• Clogged exhaust cooling system.
Flush exhaust cooling system.
• Quick connect adapter left in
flushing connector.
Remove adapter from flushing
connector and retry watercraft. If
problem persists, refer to an au-
thorized Sea-Doo dealer.
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Weak spark.
• Fouled/defective/worn spark
plugs.
Replace.
Wrong spark.
• Ignition coils wrongly
connected.
Refer to an authorized Sea-Doo
dealer.
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
• Knock sensor malfunction.
Refer to an authorized Sea-Doo
dealer.
smo2003-003a.book Page 88 Tuesday, August 27, 2002 9:23 AM