1994 Johnson/Evinrude "ER" 9.9 thru 30 outboards Service Repair Manual P/N 500607, Page 91Get this manual
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Intake Manifold Servicing, 9.915 Removal
[!] 1 Inspect the leaf plate assemblies for damage:
The leaf valves and plate must not be distorted The leaf valve tips must not be cracked