2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 119Get this manual
SYSTEM ANALYSIS FUEL DELIVERY
FUEL DELIVERY
WARNING
Protect against hazardous fuel sprayBefore starting any fuel system service, carefully relieve fuel system pressureRefer to Relieving Fuel System Pressure on p168Use the Evinrude Diagnostics Software program to review service codes prior to troubleshootingCorrect all conditions related to service codes FIRSTInspect all fuel hoses, filters, and connectionsCheck quality of fuel supply
Results: Pressure test indicates 20 to 30 psi (138 to 207 kPa): Circulation pump output is goodMake sure fuel system pressure does not fall below 15 psi (103 kPa) after outboard (pump) is OFF for five minutesLeakdown indicates fuel system leak or leaking injectorLow or no pressure, pump runs: Suspect damaged fuel pressure regulator in vapor separator or faulty circulation pumpPerform Pressure Regulator Test on p165Pump does not run:
Check voltage at pin of fuel pump connectorVoltage should be 12 key ON, 55 cranking or running Check voltage at pin of fuel pump connectorThe EMM controls the fuel pump ground (brown wire)Use the fuel pump test of the diagnostic program to activate the ground control function of the EMMConnect voltmeter positive lead to pin and negative meter lead to groundActivate Fuel Pump test or run outboardVoltage reading should drop slightly as EMM connects the control circuit to groundExcessive pressure: Check for restricted pressure regulator in vapor separator or restricted fuel return manifold