2008 Evinrude E-TEC 55MFE Technical Manual, Page 145Get this manual
FUEL SYSTEM COMPONENTS
Fuel Manifolds
The fuel supply and return manifolds route fuel through the high pressure side of the fuel system
Fuel Supply Manifold
The fuel supply manifold supplies pressurized fuel to the inlet port of each fuel injector
Then, the EMM is programmed to compensate for variations in fuel flowEach injector and its location on the outboard is identified by the EMMDO NOT install an injector without updating the compensation softwareEach service injector includes its fuel flow information on 3.5 infloppy diskThis software allows the EMM to be reprogrammed for this injector's unique fuel flow characteristics
Fuel Return Manifold
The fuel return manifold provides route for fuel passing through the fuel injectors to flow back to the fuel chamber of the vapor separator
IMPORTANT: Fuel injectors MUST NOT be
moved from one cylinder to anotherEMM programming is associated with the cylinder location of each injectorInstalling an injector on the wrong cylinder can result in powerhead failure