Bombardier SeaDoo 1998 factory shop manual, Page 44Get this manual
Section 03 TROUBLESHOOTING Subsection 01 (TROUBLESHOOTING CHART)
ENGINE MISFIRES, RUNS IRREGULARLY
OTHER OBSERVATION
Weak spark
POSSIBLE CAUSE
Fouled, defective, worn spark plugs Faulty rev limiter or ignition module Sheared flywheel key
Checkverify heat rangegapreplace Check, refer to subsection 08-02 Check timing mark, refer to subsection 08-02 Checkrefill Checksiphon and refill Checkcleanreplace Checkcleanadjust, refer to subsection 06-04 Pressure check engine, refer to subsection 04-02 Checkreplace Tighten carburetor(s) Checkadjust choke cable Checkreplace Checkadjust, refer to subsection 06-04 Check, refer to subsection 06-04 Checkreplace, refer to subsection 04-07 Checkadjust, refer to subsection07-03 Check, refer to subsection 06-04 Check, refer to subsection04-07
Lean fuel mixture Dry spark plug (except when water fouled)
Low fuel level Stale or water fouled fuel Fuel filter dirty or restricted Carburetion dirty or out of adjustment Leaking crankshaft seal(s), intake or rotary valve cover O-ring Restricted fuel valve Loose carburetor