1988-1992 Mercury Force 5HP Outboards Service Manual, Page 26Get this manual
KREPLACING FUEL LINE COUPLER SEALS NOTE: Form hooked tool from piece of 16 gauge (1116" diameter) steel wire using needle nose pliers1Remove O-ring seals using hooked tool Discard O-ring sealsTOP O-RING SEAL BOTTOM O-RING _
NOTE: Bottom O-ring holds the plunger and spring assembly in placeThis seal keeps fuel from leaking from connector when the fuel line is disconnectedThe top seal seals the connector when fuel line is connected2Install new O-ring seals