1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 81Get this manual
Disassembly Notel Do not disassemble leaf plate assemblies unless leaf plate seats, leaf valves, or leaf stops are damaged or corroded []
1Remove two screws per leaf valve and remove the leaf valves as required2When 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 assemblyAssembly
INote All
intake manifold components must be perfectly clean before assemblyDo not use strong carburetor cleaner or hot soaking tank
rn leafPlace leaf valvesleaf leaf plateIf new valves do not seat on 1on the plate, turn the valves overINote Used
leaf valves must not be turned over for reuseLeaf valve may break when returned to service, causing serious powerhead damage2If any leaf valves are standing open, apply light pressure using pencil eraserIf leaf valve closes with light pressure, valve is acceptableIf not, inspect leaf plate for high spots or burrs