1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 71Get this manual
Carburetor Cleaning and InspectionAll Models Cleaning
Never clean carburetor by submerging or soaking it in hot tank or carburetor cleanerDo not expose plastic or rubber parts to any carburetor cleaner1Before inspection, all carburetor components must be perfectly clean Carburetor must be completely disassembled Clean parts with mild aerosol solvent Use clean bristle brush to remove gum or varnish deposits Blow dry with shop air of not more than 25 psi (172 kPa)Inspection 1Inspect the inlet needle and float valve seat Check inlet needle tip for grooves, nicks, scratches, or distortion Check float valve seat for nicks, scratches, or distortion Check float for signs of oil or gasoline saturationI Note Inlet needle and float valve seat must be replaced as a