Bleeding The Fuel System - Westerbeke 20.0KW sbeg Operator's Manual

FUEL SYSTEM
BLEEDING THE FUEL SYSTEM
If
the engine cranks but fails to start or starts and then shuts
down, there may be air in the fuel system. Use the following
procedure to purge air from the fuel system.
1. Connect a fuel pressure gauge kit (Snap-On MT 3378) or
equivalent to the Schrader port on the fuel cell.
A
CAUTION:
Fol/ow the manufacturers
InsIrut:l/tm$ for the safB use of Mil pressure gaugll
kit nn purging high
pIIISSIITII
fulll systtIms.
2. While holding the STOP switch in the prime (depress)
position, bleed the air from the fuel cell. The fuel cell is
purged when no air bubbles are visible escaping from the
bleed line.
3. Remove the pressure gauge kit from the fuel cell and
connect it to the Schrader valve at the throttle.
4. Open the valve on the fuel pressure gauge line. Do not
prime system without the fuel gauge purge valve open or
air can be forced back into fuel cell. If this happens,
repeat steps
I,
2, and 3 to remove trapped air from the
fuel cell.
I
FUEL CELL
(FUEL PUMP/FllTER)
FlJELFILTER
5. Repeat step 2, this time purging the air completely from
the throttle body. The pressure should be 40psi in the
throttle body after purging the system.
NOTE:
The system can develop 40psi without being folly
purged. The system is only folly purged when no bubbles
are visible in the purge line.
6. Remove the pressure gauge set, and cap all Schrader
valves.
7. Insure that all wire connections are secure and that there
are no leaks in the fuel system.
INLET FUEL
FIlTER
PRESSURE
GAUGE
"SNAP-ON· roOL" PROVIDES AN
EXCELLENT PRESSURE GAUGE KIT
FOR PRESSURE TESTING AND
BLEEDING SCHRAOER TEST PORTS
BLEEDING THE FUEL SYSTEM
Engines & Generators
15A