2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 28Get this manual
SPECIAL TOOLS AND SERVICE SPECIFICATIONS
TECHNICAL DATA
Carburetion Calibration Low-Speed Setting Starting Enrichment Carburetor Float Level Setting
One single-throat carburetor, float feed Adjustable low speed; Fixed high speed
Adjustable low speedFixed intermediate and high speed
Refer to FUEL SYSTEM section Manual choke Float gauge PIN 324891 to 38 in(25 to 35 mm) to 38 in (25 to 35 mm) Manual choke
Carburetor Float Drop Setting Preferred Fuel Acceptable Fuel Minimum Octane
Regular unleaded, plus grade unleaded, premium unleaded gasolines Any of the above gasolines with 10 Ethanol or Methanol with co-solvents 87 AKI (R+M)2 or 90 RON
Additives
2+4 Fuel Conditioner, Fuel System Cleaner, Carbon Guard Use only Bombardier recommended fuel additivesThe use of other additives may result in engine damageSee FUEL REQUIREMENTS, this section, for additional information