1994 Johnson/Evinrude "ER" CV 85 thru 115 outboards Service Manual, Page 67Get this manual
Install gearcase pressure tester to VRO$ pulse hose fittingPump to 15 PSIPump holds pressure?
This chart determines the condition of the fuel pump portion and air motor portion of the pump
Slowly pump gearcase testerInspect for escaping air Does pump click several times with each stroke of tester?
Hold pump in normal running positionCover fuel outlet; rapidly remove pressure hose from pulse fittingPump should not clickDid pump click?
DIA-I Wait secondsUncover fuel outletPump should clickDid pump click?
STOP HEREAir motor housing is cracked or leakingRepair leak or INSTALL MOTOR HOUSING KIT