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Operation
PRIMING THE FUEL SYSTEM
Diesel Model Only
Priming the fuel system fills the fuel filters and removes
any air bubbles from the fuel system. This must be per-
formed before the first use, after any fuel filter mainte-
nance or if the fuel system is run dry.
To prime the fuel system:
On the water separator:
1. Using a 1/2” wrench, loosen the vent screw (A) on
the water separator 2-3 revolutions.
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 (A) to 4.5 ft.lbs. (6 N.m.).
DO NOT OVER TIGHTEN!
On the engine fuel filter:
1. Using a 9/16” wrench, loosen the vent screw (C) on
the engine fuel filter 2-3 revolutions.
2. Operate the hand pump (B) up and down until fuel
that is free of air flows from the vent.
3. Tighten the vent screw (C) to 4.5 ft.lbs. (6 N.m.).
DO NOT OVER TIGHTEN!
4. Tighten the priming hand 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.
Figure 2. Fuel System Priming
A. Water Separator Vent Screw
B. Priming Hand Pump
C. Engine Fuel Filter Vent Screw
A
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.
B
C
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