1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, Page 98Get this manual
Intake Manifold ServicingAll Models Removal 1Follow steps listed in Carburetor Removal, this section2Remove manifold screws and remove manifoldDisassembly 1Remove the two screws per leaf plate assembly, and remove the leaf plate assemblies as requiredINotel Do not disassemble leaf plate assemblies unless leaf plate seats, leaf valves, or leaf stops are damaged or corroded Note Check parts availability before servicing leaf plate assembliesAssemblies on some models are not serviced in detail
2When disassembling leaf plate assemblies, do not lift or bend leaf valvesRemove the leaf stop screws, and remove the stops and leaf valves3When disassembled, keep the stops and leaf valves separated by assemblyInspection 1Inspect the leaf plate assemblies for damage: The leaf valves and plate must not be distorted COBll09