1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 84Get this manual
BTurn key switch ONPump will run for 10 secondsResults20-30 PSI (138-207 kPa)OKCheck Fuel Injection System operation, Step Low or no pressuresuspect damaged fuel pressure regulator or circulation pumpReplace vapor separator assembly if either is defective Excessive pressuredamaged or restricted pressure regulator or kinked fuel return line Pump won't rungo to Step 4 INote Cranking or running engine should show the same results
rnremoving Check lift PumpLift from front of enginePerform Step 3: pump can be pressure tested by pumpfilter assembly
this test only if damaged pump is suspected Apply 15 PSI (103 kPa) to pulse nipple on bottom of pump to test for hole in diaphragmUse soapy water to check for external leaksAHolds pressure for 30 secondsOKCheck circulation pumpGo to Step 4BWill not hold pressurerepair or replace lift pumpSee Section 5
CRepeat test on upper pulse nipple
Step 4: Check Circulation PumpConnect 100 PSI (690 kPa) gauge to pressure tap at injector fuel linePump primer bulb to fill vapor separatorAInitiate "Fuel Pump Test" using FFI Diagnostic Software while monitoring pressure Pump will run for secondsResults: 20-30 PSI (138-207 kPa)OKCheck Fuel Injection System operationStep 5