TP-6071 3/0012 Section 4 Fuel System
6. Toggle the start/stop switch until fuel, free of air
bubbles, flows from vent screw C. Tighten the vent
screw.
1
2
3
4
5
1. Vent screw B
2. Vent screw A
3. Fuel filter
4. Vent screw C
5. Fuel injection pump
607142
Figure 4-2 Bleeding the Fuel System
4.4 Fuel Pump
The fuel pump transfers fuel from a source to the
injection pump.
Fuel Pump Test Procedure:
1. Remove the two leads at the bottom of the fuel
pump. The pump terminals are labeled (--) and (+).
SeeFigure4-3.
2. Connect the inlet side of the pump to a fuel source.
Disconnect the outlet hose from the fuel filter and
place the hose end in a container to catch the fuel.
3. Connect the positive (+) terminal of a 12-volt
battery to the positive terminal of the fuel pump.
Connect the negative terminal of the fuel pump to
the negative (--) terminal of the battery. You should
hear the pump operate and see fuel discharge from
the pump outlet. Replace the pump if it does not
operate.
4. Connect a pressure gauge to the outlet side of the
fuel pump. Repeat step 3
. See Section 1.3 for the
specified fuel pump pressure ratings.
I-940
1
23
4
1. Fuel inlet
2. Negative (--) terminal
3. Positive (+) terminal
4. Fuel outlet
Figure 4-3 Fuel Pump
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