1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 122Get this manual
3 Install float valve
,float ,and hinge pin
4Check for correct position ing 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 Special Tool PN 324891 (Float Gauge), on gasket surface, and slide gauge up next to floatTop 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 seat
5Check 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 to dimension shownTo adjust, bend tab on float arm where tab contacts float seat