1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, Page 99Get this manual
Assembly
1Place leaf valves on leaf plate If new valves do not seat on the leaf plate, turn the leaf valves overleaf valves must not be tu rned 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
INote Used
INote Do not lap leaf platesIf plate is too smooth, the leaf valves
may stick closed after off-season storage3Apply OMC Locquic Primer to mounting screws and allow to air dry[] 4Apply OMC Screw Lock to mounting screwsWipe off excess adhesive5Assemble leaf valve shim (if required) and leaf stopInstall two screws near center of leaf stopDo not tighten
6Hold leaf valve assembly in horizontal position This will usually align leaf valves over ports in leaf plateTighten the two screws evenly