Purging The Fuel System; Fuel System; Priming; Filling The Fuel System - Mercury TDI 3.0L Operation And Maintenance Manual

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3.
Securely tighten the bleed screw.
a

Purging the Fuel System

IMPORTANT: The fuel line must be purged before the engine is put into operation.
1.
Loosen the bleed screw on top of the fuel filter bracket.
2.
Use a suitable container to collect fuel while purging the system. Clean up any spills immediately and dispose of the fuel in
a safe manner according with all local, federal, and international regulations.
3.
Move the hand pump on top of the fuel filter bracket up and down repeatedly. The filter is full when an air‑free stream of
fuel flows from the bleed screw port.
a
4.
Install the bleed screw with the seal and securely tighten.

Fuel System

Priming

Prime the engine if it has not been run for an extended period or if the engine will not start.
1.
Move the hand pump/primer plunger on the fine element fuel filter bracket up and down several times.
2.
Start the engine.

Filling the Fuel System

NOTE: Follow this procedure if the fuel system was run dry or if part of the fuel system was drained for a service function.
1.
Move the hand pump/primer plunger on the fine element fuel filter bracket up and down several times to fill the fuel filter.
2.
Check the filter for fuel leaks. Ensure that the bleed screw on the fuel filter bracket is closed.

Winterization of Fuel System

1.
Fill the fuel tank to prevent condensation from forming.
2.
Inspect the fuel system for leaks.
3.
Drain the water from the circulation filter.
90-8M0133568
JUNE 2017
eng
a -
Primer pump
b -
Bleed screw
b
c -
Fine element fuel filter
d -
Water‑in‑fuel sensor
c
d
52259
b
50886
a -
Hand pump
b -
Bleed screw and seal
Section 4 - Maintenance
Page 47

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