1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 78Get this manual
Intake Manifold Servicingthru 8 Removal 1Follow steps listed in Carburetor Removal, this section2Remove the screws securing intake manifold to crankcase
5 thruRemove two screws securing leaf plate to crankcaseInspection INotel Do not lift or bend leaf valves by handThis may damage them so they may not seal properly or may break after the engine is returned to service
1Inspect the leaf plate assemblies for damage:
The leaf valves and plate must not be distorted The leaf valve tips must not be cracked or chipped The leaf stops must not be distorted or loose
Use machinist's straightedge to check the flatness of the leaf plateThe gasket surfaces must be flat, 0.003 in(0,08 mm)