1993 Johnson Evinrude "ET" 9.9 thru 30 Service Manual, P/N 508282, Page 101Get this manual
Disassembly
INotel Do not disassemble leaf plate assemblies unless leaf plate
seats, leaf valves, or leaf stops are damaged or corroded!sl 1Remove one screw and nut per leaf valve and remove the leaf plate assemblies as required2When disassembled, keep the stops and leaf valves separated by assemblyAssembly
INotel All
intake manifold components must be perfectly clean before assemblyDo not use strong carburetor cleaner or hot soaking tank1Place leaf valves on leaf plateIf new valves do not seat on the leaf plate, turn the leaf valves over
Used leaf valves must not be turned over for reuseLeaf valve may break when returned to service, causing serious powerhead damage12687