1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 94Get this manual
Carburetor ServicingAll Models ill nent disconnected or removedFuel leakage could contribute to fire or explosionCalibration To accommodate changes in factory specifications, weather "" Do not attempt to run engine with any fuel system compo-
L!J conditions, or altitude, carburetor calibration can be adjusted
w ithout removing the carburetors
L!J intermediate mixture is controlled by an air bleed orifice The high speed mixture is controlled by fuel orifice Using the engine's model number, refer to current parts catalog and orifice list in Section to determine correct orifice sizeRemoval Avoid pulling "E.S1763" fuel line off fuel fittingsPush off wherever possibleWhen removing "E.S1763" fuel line from VRol fittings, carefully cut the hose to avoid damaging the fittings1If equipped, remove the power steering hose support bracketLoosen the retaining screws and remove the port and starboard lower engine coversf21 2Remove the retaining screws and remove the air silencer assembly3An individual carburetor main body can be removed without disturbing the throttle body or linkagef31 4Cut the tie strap securing the main body fuel supply hose and carefully remove the hoseI,;l 5To remove the main body for inspection and cleaning, remove four screws (two long, two short) securing it to the throttle body