1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 77Get this manual
Assembly
1Position the spring and washer on the plunger shaftf16l2Install two new a-rings and quad-ring onto plunger shaftf1713Install new a-ring on the end cap, and position the end cap on the plunger shaftf1814Insert the plunger shaft and end cap into the primer pump housingReinstall retainer clip
195To (127 mm) pieceprimer pump after assembly, connect bench test the of hose to the large nipple and place the inother end of hose in container of alcoholConnect hose to the small nipple and place other end of hose to drain into containerHold primer pump in horizontal position as it would be installed on the engineMove plunger back and forth ten timesPrimer should pump approximately 10 cc of alcohol in ten strokesIf pump fails to pump alcohol, disassemble and check for missing, cut, or split a-rings or damaged check valves