1990 Johnson Evinrude "ES" 9.9 thru 30 Service Repair Manual, P/N 507871, Page 86Get this manual

1990 Johnson Evinrude "ES" 9.9 thru 30 Service Repair Manual, P/N 507871, Page 86

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Intake Manifold Servicing, .915 Remova 1 Remove the powerhead as described in Section 4 Loosen and remove six intake manifold screws

distorted loose
The check valve disk must intact