Mercury Force 9.9, 15HP Outboards Service Manual, Page 16Get this manual
FREPLACING FUEL LINE COUPLER SEALS NOTE: Form hooked tool from piece of 16 gauge (1116'" diameter) steel wire, using
a needle nose pliers1Remove O-ring seals using hooked tool Discard O-ring seals
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 {ueline is connected2Install new O-ring sealsNOTE: If coupler continues to leak after new O-rings are in place, replace coupler