1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Repair Manual P/N 520204, Page 93Get this manual
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Intake Manifold Servicing20 thru 30 Removal
INote 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