Bombardier SeaDoo 1990 factory shop manual, Page 191Get this manual
Section 13 TROUIBLESHOOTING
ENGINE OVERHEATS
OTHER OBSERVATION
Overheat beeper sounds
POSSIBLE CAUSE
Checklclean Checkflush, refer to section 04-01 Check clean adjust, refer section 05-01 Checkreplacerepair
Restricted jet pump water intake Cooling system restriction Carburetor adjustment Grounded temperature sensor or sensor wire
ENGINE CONTINUALLY BACKFIRES
OTHER OBSERVATION
1 Weak spark,
POSSIBLE CAUSE
Clean replace Check1 replace, refer to section 07-05-3 Checkjreset, refer to section 07-02 Check replace
Fouled, defective spark plugsRPM limiter malfunction