1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 95Get this manual
8Carefully remove the fuel hoses and remove the carburetor assemblyDisassembly f71 1Discard the O-ring seal between the carburetor main body and throttle body1al 2Remove the float chamber screws and remove the float chamber 19l 3
Remove the float chamber plug with large flat blade screwdriver and remove the float hinge pin screw Remove the float
r,Ql 4Remove the high speed fuel orifice with OMC Driver
PIN 3170025Remove the float valve seatr:J1l 6Discard the float chamber gasketRemove side cover plate and discard the plate gasketf121 7Remove the idle and intermediate circuit air bleed orifices with OMC Driver PIN 317002Inspection 1Inspect carburetor main body and float chamber Gasket surfaces must be smooth with no nicks or irregularities All nozzles and pick-up tubes must be securely in place All metal orifice inserts must be securely in place6766