Bleeding The Fuel System - Westerbeke 3.5KW SBCG-60Hz Operator's Manual

FUEL SYSTEM
BLEEDING THE FUEL SYSTEM
PURGE
LINE
TO CONTAINER
NOTE:
The following procedure must be performed when
ever the fuel system is serviced (filter changes, etc) and at
least once a season to ensure that any air that may have
entered the fuel system is dispelled.
INSTRUCTIONS
1. Connect a Snap On MT337B, OTC 7211 or equivalent
fuel bleed/pressure gauge set to the schrader valve on the
fuel rail at the injectors and direct its purge line into a
container.
2. Unplug the electrical harness attached to the fuel modulel.
Shut the thru-hull that supplies sea water to the unit.
3. Disconnect the coil wire from the coil so the engine will
not attempt to start.
4. Close the raw water thru-hull that supplies the generator.
Put the generator through two to three crank cycles and
monitor the purge line going into the container. When
.airaled fuel is seen tlowing through this hose into the con-
tainer, stop initiating crank cycles.
NOTE:
The unit will
crank without starting for approximately
8
seconds then
stop. You will be able to initiate three start cycles before
the ECU will terminate a start cycle and trigger an LED
fault light,. The underspeed LED will flash. Reset the
ECU to remove the fault by opening and closing the 20
amp DC breaker on the control panel.
TO INTAKE
MANIFOLD
UNPLUG THE ELECTRICAL HARNESS
FUEL
MODULE
DISCONNECT
5. Open the raw water thru-hull that supplies the generator.
Reconnect the engine harness to the fuel module harness.
6. Close the valve to the purge line and depress the STOP
switch and hold it. Monitor pressure at the fuel rail. It
should reach approximately 40 psi. Release the STOP
switch. Open the thru-hull that supplies sea water to
the unit. Start the engine. Pressure should remain at
approximately 39-40 psi while the engine is running.
Connect a gauge set to the schrader valve on the fuel
module. Purge air from the module while the engine is
running. Then connect the gauge set to the schrader valve
on the fuel rail and purge any air from it while the engine
is running.
7. Stop the engine. Carefully release pressure at the fuel rail
through the purge line and remove the tool from the
schrader valve. Replace the cap on the valve.
8. Start the engine and check for any fuel leaks.
A
CAUTION:
Fuel and fuel vapors are explosive! Do
not allow any smoking, open flames or other source of
fire near the fuel system. be certain that fuel lines are
tight and free of leaks. Wipe up any spilled fuel and
properly dispose of soiled rags.
Engines & Generators
25