1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 86Get 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 manifold Disassembly
1Remove the two screws per leaf plate assembly, and remove the leaf plate assemblies as required
INote Do not disassemble leaf plate assemblies unless leaf plate
seats, leaf valves, or leaf stops are damaged or corrodedINotel Check parts availability before servicing leaf plate assembliesAssemblies on some models are not serviced in detail