1998 Johnson Evinrude "EC" 90, 100C, 105C, 115, 150, 150C, 175 60 deg. LV Service Manual, P/N 520210, Page 102Get this manual
Disassembly
1Remove the two screws per leaf plate assembly, and remove the leaf plate assemblies as required
INote Do not disassemble leaf plate assemblies unless leaf plate
seats, leaf valves, or leaf stops are damaged or corroded2When disassembling leaf plate assemblies, do not lift leaf valvesRemove leaf stop screws, stops and leaf valves3Keep the stops and leaf valves separated by assemblyInspection
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 26772
The leaf plate stops must not be distorted or loose If loose, tighten leaf plate screws using OMC Screw Lock2Inspect the intake manifold:
All gasket surfaces must be smooth and free of nicksUse machinist's straightedge to check flatness in all directionsSurface must be flat, 0.004in (0,10 mm)