1988-1992 Mercury Force 5HP Outboards Service Manual, Page 34Get this manual
EASSEMBLING AND INSTALLING FUEL PUMP 1Install fuel pump filter fitting (A) Apply sealant (Special Tool NoT-8955) to fitting threadsThread fitting into fuel pump cover until secure
Place diaphragm between gaskets Use new gasketsBe sure diaphragm is not wrinkled and that it extends beyond the gaskets all the way around