1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 97Get this manual
Assembly r;] 1Place leaf valves on leaf plateIf new valves do not seat on leaf plate, turn the leaf valves over
Used leaf valves must not be turned over for reuse Leaf valve may break when returne to serVice, causmg serious powerhead damage
2 If 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
["jj::l Do not lap leaf plates in figure pattern on lapping block If 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)f5l 4Apply OMC Screw Lock to mounting screws Wipe off adhesive5 Assemble leaf valve shim (if required) and leaf stop Install two screws near center of leaf stopDo not tightenf61 6Hold leaf valve assembly in horizontal positionThis will usually align leaf valves over ports in leaf plateTighten two screws evenly2683