1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 71Get this manual
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 gauge
Use notch that is indicated "9.915 HP Be 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 seat