1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Manual, P/N 507122, Page 82Get this manual
Intake Manifold Servicing, 9.915 Removal 1Remove the powerhead as described in Section 4
2Loosen and remove six intake manifold screws
]] 3Remove intake manifold, leaf plate, and two gasketsDiscard gasketsInspection
1Inspect the leaf plate assemblies for damage:
The leaf valves and plate must not be distorted The leaf valve tips The leaf stops
must not be cracked or chipped
must not be distorted or loose
The check valve disk must be intact and free to move inside the valveThe check valve screen must be cleanUse machinist's straightedge to check the flatness of the leaf plateThe gasket surfaces must be flat, 0.003 in(0,08 mm)