1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 326Get this manual
r:Jl1Be sure the manual release valve is screwed in all the wayRemove the retaining ring using OMC Retaining Ring Pliers PIN 3038572Remove the manual release valve assemblyf313Inspect the components of the manual release valve, the housingspring and needle Discard the O-ring on the housingf414Remove the up check valve housing using drag link socketRemove the components of the up check valve from the manifold20660