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11
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 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 on the
water separator 2-3 revolutions.
2. Unscrew the priming hand pump (B, Figure 3) locat-
ed 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 on the engine fuel filter 2-3 revolutions.
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 on the
fuel inlet 2-3 revolutions.
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.