2002/2003 Johnson SN/ST 2 Stroke 3.5, 6 8 HP Outboards Service Manual, PN 5005466, Page 128Get this manual
FUEL SYSTEM CARBURETOR68 Float Level Check for correct positioning of float levelThe float level controls the height of fuel in the float chamber and is critical with regard to carburetor calibration and functionTurn carburetor body upside down and hold so gasket surface is horizontalThe weight of the float will close the float valve needleRest Float Gauge, PIN 324891, on gasket surface and slide gauge up, next to floatTop of float should be between notches on gaugeUse notch that is indicated "9.915 HP Be certain gauge is not holding down the float
Float Drop Dimension
Check for correct float drop dimensionThis dimension affects the full opening of the inlet needle and is critical to correct operation of the carburetorWith carburetor body in normal running position, the float must drop open from base of carburetor body to dimension shownFloat Drop Dimension