Bombardier SeaDoo 1998 factory shop manual, Page 188Get this manual
Section 06 FUEL SYSTEM Subsection 04 (CARBURETOR)
Check for bubblesIf they come from seat or O-ring, bubbles will exit around seatRetighten as necessaryIf it still leaks remove needle and seat and replace O-ringIf bubbles come from needle, replace needle and seat
11, Check Valve Assembly
The check valve is needed if back pressure occurs into carburetorIt will prevent fuel from flowing back into carburetor lower portionInspect check valve, it should be free of holes, tears or imperfectionsReplace as needed9,10, Main Jet and Pilot Jet
Pilot jet and main jet are replaceableDifferent jet sizes are available to suit temperature and altitude conditionsAlways inspect spark plug tip condition when dealing with pilot jet and main jetSpark plug tip condition gives good indication of carburetor mixture setting
F01F12A
CAUTION
1Check valve
Adjustments vary with temperature and altitudeAlways observe spark plug condition for proper jettingNOTE: To have access to pilot jet or main jet, check valve housing must be removed2 1