
87
Engine Misfires, Misinjects, Runs Irregularly
Engine Smoke
Engine Overheats
Engine Continually Backfires
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 authorized
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.
smo2004-001a.book Page 87 Monday, March 31, 2003 12:17 PM
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