1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 105Get this manual
Assembly '4l1Place leaf valves on leaf plateIf new valves do not seat on the leaf plate, turn the leaf valves over r:=:J
Used leaf valves must not be turned over for reuseLeaf valve may break when returned to service, causing serious powerhead damage
2If 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 burrsDo 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 dry1sl4Apply OMC Screw Lock to mounting screwsWipe off e.J excess adhesive5Assemble leaf valve shim (if required) and leaf stopInstall two screws near center of leaf stopDo not tightenf6l6Hold leaf valve assembly in horizontal positionThis will usually align leaf valves over ports in leaf plateTighten the two screws evenly1254