Operation
Operation
PRIMING THE FUEL SYSTEM
Priming the fuel system fills the fuel filters and removes any air bubbles from the fuel system. This must be performed before the first use, after any fuel filter maintenance or if the fuel system is run dry.
WARNING
Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the ignition switch off when changing fuel filter or water separator element. Clean up fuel spills immediately.
To prime the fuel system:
On the water separator:
1.Using a 1/2” wrench, loosen the vent screw (A, Figure 2) on the water separator
2.Unscrew the priming hand pump (B) located on top of the water separator. Operate the hand pump up and down until fuel that is free of air flows from the vent.
3.Tighten the vent screw to 4.5 ft/lbs (6 N.m.). DO NOT OVER TIGHTEN!
On the engine fuel filter:
1.Using the appropriate size wrench, loosen the vent screw (C) on the engine fuel filter
2.Operate the hand pump up and down until fuel that is free of air flows from the vent.
3.Tighten the vent screw to 4.5 ft/lbs (6 N.m.). DO NOT OVER TIGHTEN!
On the engine injector pump:
1.Using a 13mm wrench, loosen the vent screw (D) on the fuel inlet
2.Operate the hand pump up and down until fuel that is free of air flows from the vent.
3.Tighten the vent screw to 4.5 ft/lbs (6 N.m.). DO NOT OVER TIGHTEN!
4.Tighten the priming fuel pump finger tight.
5.Start the engine. (See STARTING THE ENGINE). If the engine will not start, further priming is necessary. If the engine starts but misfires or continues to emit smoke, further priming is necessary.
6.If the engine starts but runs rough, continue to run the engine at low idle until the engine runs smoothly.
18
B
A
C
D
Figure 2. Fuel System Priming
A.Water Separator Vent Screw
B.Priming Hand Pump
C.Engine Fuel Filter Vent Screw
D.Injector Pump Vent Screw
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