Fuel Circulation Pump; Fuel Manifolds; Fuel Injectors - Evinrude E-TEC E115DPLSCR Service Manual

Pressure Regulator
The fuel pressure regulator helps maintain consis-
tent fuel pressure in the fuel system.
Fuel returning from the injectors enters the fuel
chamber of the vapor separator through a pres-
sure regulator. The pressure regulator maintains
approximately 20 to 30 psi (138 to 207 kPa) of fuel
pressure in the high pressure side of the fuel sys-
tem.

Fuel Circulation Pump

The fuel circulation pump is an electric high pres-
sure fuel pump.
Fuel Supply
The pump is mounted to the vapor separator and
draws fuel from the fuel chamber. It pumps pres-
surized fuel through a fuel supply manifold con-
nected to the fuel injectors.
Electrical Circuit
The circulation pump is controlled by the EMM
and operates on the 12 V circuit. The circulation
pump is activated momentarily when the EMM
powers up. The EMM controls pump operation by
rapidly connecting and disconnecting the pump's
internal coil to ground.
1
1. Fuel pump electrical connector

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.
Fuel Return Manifold
The fuel return manifold provides a route for fuel
passing through the fuel injectors to flow back to
the fuel chamber of the vapor separator.
1
1. Fuel supply
2. Fuel return

Fuel Injectors

Fuel injectors are fuel metering, electric solenoids
(55 V) bolted directly to the cylinder head. The
EMM controls the activation of each injector by
rapidly connecting and disconnecting the injec-
tor's internal coil to ground.
Fuel Flow Compensation
The flow rate of each injector is measured as part
of the manufacturing process. This information is
recorded and assigned to the injector by serial
number.
The EMM is programmed to compensate for vari-
005327
ations in fuel flow. Each injector and its location on
the outboard is identified by the EMM. DO NOT
install an injector without updating the compensa-
tion software.
FUEL SYSTEM
COMPONENTS
2
005332
8
177