Fuel System Description; Fuel Control Cell (Fcc) Fuel System; Servicing The Fcc - Crusader 5.0L MPI Instruction Manual

FUEL SYSTEM DESCRIPTION

Crusader Marine Engines will be equipped with one of
two fuel systems: The Fuel Control Cell (FCC), "Return"
or "Returnless-Type."
The "Return-Type" fuel system is best described as
having a fuel feed line coming from the fuel tank and fuel
line that returns unused fuel back to the fuel tank.
The "Returnless-Type" fuel system requires a fuel feed
line to supply fuel. Excess fuel, not used by the engine,
is circulated through the FCC bowl.
WARNING
Extreme caution must be exercised when servicing
the fuel system and/or replacing fuel fi lter. Gasoline
is extremely fl ammable and highly explosive under
certain conditions. Be sure the ignition key is off and
do not smoke or allow open fl ame in the area while
servicing. Wipe up any spilled fuel immediately.
WARNING
Accumulation of water and other fuel contaminants
may form corrosive compounds that can damage
the fuel fi lter, and result in fuel leakage. Ethanol
blended fuel may increase this risk. For this reason,
annual replacement of the fuel fi lter, at a minimum, is
required to avoid risk of explosion or fi re.
WARNING
Extreme caution must be exercised when servicing
the fuel system. The fuel system operates under
high pressure. Use caution when removing or
replacing components, as residual pressure may be
present.
WARNING
Make sure that there are no fuel leaks before closing
the engine hatch.
WARNING
Visually inspect unit for fuel leaks before operating
the engine. If fuel leaks are present, DO NOT
operate the engine, contact your Crusader Premier
service center immediately.
ENGINE MAINTENANCE - 11

Fuel Control Cell (FCC) Fuel System

The Fuel Control Cell (FCC) eliminates vapor lock and
air ingestion caused by fuel tank slosh, and provides the
necessary fi ltration and water separation.
The FCC system incorporates two (2) fuel pumps to
provide an uninterrupted fl ow of fuel to your Crusader
marine engine. Fuel is fed into the FCC bowl by a low-
pressure, high-volume electric fuel pump. This pump
fl ows fuel at a volume much greater than the fuel fl ow
rate required of the high-pressure pump and engine
demands. The high-pressure pump, mounted inside the
FCC bowl, provides the necessary fuel pressure and
volume to maintain proper engine performance. The
FCC constantly has an ample supply of fuel to meet the
idle, cruise and acceleration fuel requirements of the
engine.
The fuel pressure regulator, located on the fuel rail,
controls the fuel pressure, and maintains a constant
pressure across the fuel delivery system. 6.0L and 8.1L
engines' fuel pressure regulator is located inside the
FCC, therefore, they do not require a fuel return line
from the fuel rail. Excess fuel, not used by the engine,
returns to the FCC bowl.
The fuel delivered to the engine by the FCC is fi ltered
by a fi lter and water separator element, which surrounds
the high pressure pump inside the FCC bowl.
As indicated above, fuel enters the FCC bowl from two
(2) locations, the low-pressure pump (initial input) and
the fuel pressure regulator (unused, recirculating fuel).
Fuel exits the FCC bowl at two (2) locations (Return-
Type fuel system, only), the high-pressure output to the
fuel injection system and all excess fuel in the FCC bowl
is routed back to the tank via the return line.

Servicing the FCC

The frequency of draining the water or replacing the fi lter
element is determined by the contamination level of the
fuel. Replace the fi lter element at least once a year, or
when a loss of power is noticed (whichever occurs fi rst).
This unit should only be serviced by a qualifi ed
Crusader Premier technician. Improper use,
installation or servicing may cause an explosion or
fi re resulting in bodily injury, or death. Read and
follow all instructions before proceeding. Run the
engine and check for fuel leaks after installation,
element replacement or draining the bowl. DO NOT
remove the FCC bowl unless servicing the fi lter
element, otherwise contamination or bowl O-ring
swelling may result.
L510001-13
WARNING
51