1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 94Get this manual
Disassembly f8l 1Remove drain plug and high speed orifice from float chamber using OMC Orifice Driver PIN 3170022Remove intermediate air bleed orifice [!] 3Remove retaining screws and float chamber 4Remove float and inlet valve assembly
[!] 5Remove high speed nozzle gasket 'al 640, 48, 50 ModelsRemove components of slow speed needle
[!] 755 Comm- Remove intermediate fuel orifice 855 Comm- Remove slow speed fuel orifice (8) When installing new parts from carburetor rebuild kit, inspect gaskets and compare to original gaskets to ensure all holes are correctly punchedAlso, inspect new gaskets for any loose fibers or particles of gasket materialCleaning and Inspection 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)_ _- DR2778