1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 90Get this manual
Check for correct positioning of float levelFloat level controls the height of fuel in the ffoat chamber and is very 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 PIN 324891 on gasket surface, and slide gauge up next to float Top of float should be between notches on float gaugeBe certain gauge is not holding down the float If float level is not between the notches of gauge, lightly bend metal float arm to adjust levelBe careful not to force float needle valve into seatCheck for correct float drop dimensionThis dimension affects the full opening of the inlet needle and is critical to correct operation of the carburetor With carburetor body in normal running position, the float must drop open to dimension shown To adjust, bend tab on float arm where tab contacts float seat 1101 '
Base of carburetor body Bend float lever tab to achieve proper dimension