1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 101Get this manual
Assembly f4l 1Place leaf valves on leaf plateIf new valves do not seat on leaf plate, turn the leaf valves overUsed leaf valves must not be turned over for reuseLeaf valve may brea en returne to serVice, causing serious powerhead damageote
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 plates in figure pattern on lapping blockIf plate is too smooth, the leaf valves may stick closed after off-season storage3Apply OMC Locquic Primer to mounting screws and allow to visibly dry (three to five minutes)1sl4Apply OMC Screw Lock to mounting screwsWipe off adhesive5Assemble leaf valve shim (if required) and leaf stopInstall two screws near center of leaf stopDo not tightenf61 6Hold leaf valve assembly in horizontal positionThis will align leaf valves over ports in leaf plateTighten two screws evenly