1994 Johnson Evinrude "ER" 60 LV 150, 150C, 175 Service Manual, P/N 500611, Page 62Get this manual
This chart determines the condition of the fuel pump portion and air motor portion of the pumpInstall gearcase pressure tester to VRol pulse hose fitting
Pump to 15 PSIPump holds pressure?
Hold pump in normal running positionCover fuel outlet; rapidly remove pressure hose from pulse fitting Pump should not clickDid pump click?
Slowly pump gearcase testerInspect for escaping air Does pump click several times with each stroke of tester?
DIA-I Wait secondsUncover fuel outletPump should clickDid pump click?
STOP HEREAir motor housing is cracked or leakingRepair leak or INSTALL MOTOR HOUSING KIT
Shaft seal is leakingREPLACE INTERMEDIATE HOUSING
Locate external leakREPLACE AIR MOTOR HOUSING OR INTERMEDIATE HOUSING