1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 85Get this manual
Assembly
INote Before
proceeding, be sure that all parts are perfectly cleanBe sure that all replacement parts match original ones in size and shapeReplace all gaskets, O-rings, and sealing washers each time you assemble carburetor1If removed, press the air vent Q) in the carburetor body2Install the high-speed orifice 3Install the gasket and valve seat 4Install the hinge pin
, floatand float valve
5Check for correct positioning of the float levelThe float level controls the height of fuel in the float chamber and is critical with regard to carburetor calibration and function
Turn carburetor body upside down and hold so gasket surface is horizontalThe weight of the float will close the float valve needleRest OMC Float Gauge, PI 324891, on gasket surface and slide gauge up, next to floatTop of float should be between notches on gauge