1992 Johnson Evinrude "EN" 90 deg. Cross V Service Manual, P/N 508145, Page 88Get this manual
Inspection
1Inspect the leaf plate assemblies for damage The gasket surface must be flat, 0.003 in(0,08 mm) The leaf plates must not be distorted The leaf tips must not be cracked or chipped The leaf plate stops must not be distorted or loose Test leaf plate screw tightnessIf loose, retighten using OMC Screw Lock2Inspect the intake manifold All gasket surfaces must be smooth and free of nicks Use machinist's straightedge to check the flatness in all directionsThe mounting surface must be flat, '0.004 in(0,10 mm)All intake manifold components must be perfectly clean before assemblyDo not use strong carburetor cleaner or hot soaking tankAssembly
f31 1Place leaf valves on leaf plateIf new valves do not seat on the leaf plate, turn the leaf valves overUsed leaf valves must not be turned 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 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 dryf41 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