1991 Johnson/Evinrude EI Outboards 2.3 thru 8 Service Manual, Page 87Get this manual
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 carburetor1Install the high-speed orifice into the nozzle wellPosition the nozzle well and upper gasket on the carburetor body 71 2Connect the nozzle well to the carburetor with new idle lift
tube3Install the valve seal and gasket
4Install the hinge pinfloatand float valve 5Check for correct positioning of float levelFloat level controls the height of fuel in the float 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 floatTop of float should be between notches on float gauge
Use notch that is indicated "9.915 HP" for thru models