1998 Johnson Evinrude "EC" 125C, 130, 200, 225, 250 90 deg LV Service Manual, P/N 520212, Page 90Get this manual
External fuel leak?
Connect gearcase pressure tester to VRO pulse hose fitting Pressurize to 15 PSI(Air motor piston travels full stroke to the right, poppet valve opens, and piston returns full stroke to leftBoth pressure and vacuum chambers are pressurized to 15 PSI Does pump hold pressure?
INSTALL FUEL CHAMBER O-RING, FUEL OUTLET FITTING O-RING, OR FUEL INLET FITTING O-RING
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 fitting Pump should not clickDid pump click?
Air motor cover is cracked or leaking, or vacuum port O-ring is leaking REPAIR LEAK, REPLACE VACUUM PORT O-RING, OR REPLACE AIR MOTOR COVER
I Is air leaking from fuel outlet?
Fuel piston diaph ragm or flapper valve leaking, or missing outlet fitting O-ring INSTALL FUEL PISTON AND DIAPHRAGM KIT, CHECK 0RING Wait secondsUncover fuel outlet Pump should clickDid pump clic