1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 328Get this manual
r:J5l 15Remove the filter valve plugRemove the filter valve components from the manifoldr:J6l 16Inspect the components of the filter valveplugballseat and filter Discard the O-rings from the plug and seat17Remove the fill plugDiscard the O-ring r;Bl 18Using OMC Universal Spanner Wrench PIN 912084,