Bombardier SeaDoo 1990 factory shop manual, Page 85Get this manual
Section 05 FUEL SYSTEM Sub-Section 02 (TWIN CARBURETOR)
To adjust, loosen jam nut then turn adjuster nut as necessary
CAUTIONIlrnproper oil injection pump synchronization with carburetor can cause seriouis engine damage
Adjuster nut (not shcwnl
Low-Speed Mixture Screw
Tighten jam nut and recheck adjustment WARNINGMake sure idle speed screw contacts stopper when throttle lever is fully released at handlebar
F002 005 001
Low-speed mixture screw