1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 81Get this manual
Intake Manifold Servicing Removal 1Follow steps listed in Carburetor Removal, this section2Disconnect throttle cam and linkage3Disconnect crankcase recirculating hoses4Remove manifold screws and remove manifoldDisassembly 1Remove the two screws per leaf plate assembly, and remove the leaf plate assemblies as required
fN=J Do not disassemble leaf plate assemblies unless leaf plate
seats, leaf valves, or leaf stops are damaged or corrodedCheck parts availability before servicing leaf plate assembliesAssemblies on some models are not serviced in detail2When disassembling leaf plate assemblies, do not lift or bend leaf valvesRemove the leaf stop screws, and remove the stops, shims, and leaf valves3When disassembled, keep the stops, shims, and leaf valves separated by assembly