Service Manual

Fuel Lift Pump ISB, ISBe and QSB (Common Rail [...]
Page 5-30 Section 5 - Fuel System - Group 05
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Marine Applications
WARNING
Fuel is flammable. Keep all cigarettes, flames, pilot
lights, arcing equipment, and switches out of the
work area and areas sharing ventilation to reduce the
possibility of severe personal injury or death when
working on the fuel system.
CAUTION
Use caution when disconnecting or removing fuel
lines, replacing filters and priming the fuel system, so
that fuel is not spilled or drained into the bilge area.
Do not drop or throw filter elements into the bilge
area. The fuel and fuel filters must be discarded in
accordance with local environmental regulations.
CAUTION
Failure to properly prime the fuel system on marine
engines can result in damage to the fuel cooler. Be
sure the drain valve(s) are open. Be sure a good flow
of fuel is present through the fuel cooler by cycling
the keyswitch at least five times before starting the
engine.
NOTE: It is not necessary to vent air from the high-
pressure fuel system before starting the engine. Cranking
the engine will prime the engine.
The fuel transfer pump is initiated by turning the keyswitch
to the ON position. The pump will run for 50 to 60
seconds, then shut off. Priming the fuel system requires
cycling the keyswitch several (five or more) times to make
sure the fuel filter is primed properly and that all the air is
out of the fuel system, downstream through the fuel
cooler.
Fuel Lift Pump (005-045)
Initial Check
This procedure applies to some 5.9L automotive
applications and all 5.9L marine applications.
High fuel inlet restriction can result in poor lift pump
performance or lift pump damage. Before replacing the lift
pump, measure the fuel inlet restriction. Refer to
Procedure 006-020 in Section 6.