2008 Evinrude E-TEC 55MFE Technical Manual, Page 146Get this manual
FUEL SYSTEM FUEL SYSTEM TESTS
FUEL SYSTEM TESTS
WARNING
Use caution when working on any pressurized fuel systemWear safety glasses and work in well ventilated areaExtinguish all smoking materials and make certain no open flames or ignition sources existBefore starting any fuel system service, carefully relieve fuel system pressureFailure to properly relieve fuel system pressure can result in spraying fuel andor excessive fuel spillage during servicingFuel is flammable and can be explosive under certain conditions
Shut OFF outboardMonitor pressure gaugePressure should not drop below 15 psi (103 kPa)