38
L510010-03
C.C.
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
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.
ENGINE MAINTENANCE - 11
FUEL SYSTEM DESCRIPTION
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 incorporates two (2) fuel pumps to provide an
uninterrupted fl ow of fuel to your PCM 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. 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 return line from the fuel pressure regulator
(unused, recirculating fuel). Fuel exits the FCC bowl at
two (2) locations, 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.
WARNING
Visually inspect unit for fuel leaks before operating
the engine. If fuel leaks are present, DO NOT operate
the engine, contact your service center immediately.
Содержание 2003 5.0L MPI
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