3. Securely tighten the bleed screw.
a - Primer pump
b - Bleed screw
c - Fine element fuel filter
d - Water‑in‑fuel sensor
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 - Hand pump
b - Bleed screw and seal
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.
Section 4 - Maintenance
90-8M0133568 eng JUNE 2017 Page 47
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