1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 326Get this manual
rn 1Bethe retaining ringrelease valve is screwed in all the waysure the manual Remove[I] 2Remove the manual release valve assembly
3Inspect the manual release valveDiscard the O-rings on the housing4Remove the up check valve housing using drag link socketRemove the components of the up check valve from the manifold33710
[] 5Inspect the components of the up check valvehousingspringpoppetand seat Discard the O-rings from the housing and seat[]] 6Remove the down check valve housingRemove the components of the down check valveInspect the components following Step 5