
72
Engine Misfires, Runs Irregularly
Engine Overheats
Engine Continually Backfires
Engine Pinging or Knocking
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Weak spark.
• Fouled/defective/worn
spark plugs.
Replace.
• Faulty rev limiter
(carburetor-equipped
models).
Refer to an authorized Sea-Doo
dealer.
• Too much oil supplied to
engine.
Improper oil pump adjustment,
refer to an authorized Sea-Doo
dealer.
Lean fuel mixture.
• Fuel: Level too low, stale or
water-contaminated.
Siphon and/or refill.
• Fuel filter, clogged or water-
contaminated (carburetor-
equipped models).
Refer to an authorized Sea-Doo
dealer.
• Fuel tank valve
(carburetor-equipped
models) partially open.
Turn fuel tank valve to ON position.
• Clogged injectors
(DI models).
Refer to an authorized Sea-Doo
dealer.
• Defective sensor or MPEM
(DI models).
Refer to an authorized Sea-Doo
dealer.
Rich fuel mixture
(high fuel consumption).
• Flame arrester dirty/clogged
(if so equipped).
Clean or replace.
• Partially closed choke
(carburetor-equipped
models).
Refer to an authorized Sea-Doo
dealer.
• Defective sensor or MPEM
(DI models).
Refer to an authorized Sea-Doo
dealer.
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Monitoring beeper sounds
continuously.
• Clogged jet pump water
intake.
Clean.
• Clogged coolant system.
Flush cooling system.
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Weak spark.
• Fouled/defective/worn
spark plugs.
Replace.
Overheated engine.
• See engine OVERHEATS.
Refer to an authorized Sea-Doo
dealer.
• Faulty rev limiter
(carburetor-equipped
models).
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
• Poor quality gasoline/low
octane.
Use well known quality and
recommended gasoline.
• Spark plug heat range too
high.
Use recommended spark plugs.
• Ignition timing.
Refer to an authorized Sea-Doo
dealer.
smo2000-003a.book Page 72 Thursday, November 11, 1999 10:44 AM
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