1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 346Get this manual
f1l 1Be 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 assembly housing
t!J housingspringand needle Discard the O-ring on the
4Remove the up check valve housing using drag link socketRemove the components of the up check valve from the manifold5Inspect the components of the up check valvehousingspringseatand poppet Discard the O-rings from the housing and seat