1995 Johnson Evinrude "EO" 90 CV 85 thru 115 Service Manual, P/N 503150, Page 67Get this manual
This chart determines the condition of the fuel pump portion and air motor portion of the pumpInstall gearcase pressure tester to
pulse hose fittingPump to 15 PSIPump holds pressure?
Hold pump in normal running positionCover fuel outlet; rapidly remove pressure hose from pulse fittingPump should not clickDid pump click?
Slowly pump gearcase testerInspect for escaping air Does pump click several times with each stroke of tester?
PUMP DIA-I Wait secondsUncover fuel outletPump should clickDid pump click?
STOP HEREAir motor housing is cracked or leakingRepair leak or iNSTALL MOTOR HOUSING KIT