1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, Page 326Get this manual
1Be sure the manual release valve is screwed in all the wayRemove the retaining ring2Remove the manual release valve assembly
3Inspect the manual release valveDiscard the O-rings on the housing 4Remove the up check valve housing using drag link socketRemove the components of the up check valve from the manifold
5Inspect the components of the up check valvehousingspringpoppetand seat Discard the O-rings from the housing and seat