Westerbeke 50 - Fuel System Bleeding

FUEL SYSTEM
Bleeding 19.50.07
NOTE: After renewing the fuel filter element it will only
be necessary to bl~ed the fuel filter as described in 1
and 2, provided that the engine has not been cranked while
the filter is dismantled.
1. Slacken the bleed screw at banjo fitting in the fuel
filter head. Operate the lift pump by means of its
priming lever and, when the fuel flowing from the
screw is free of air bubbles, tighten the screw.
2. Slacken the union nut at the injection pump end of
the fuel feed pipe. Operate the lift pump, and
when the fuel flowing from the union is free of
air bubbles, tighten the nut.
3. Slacken the air bleed screw on the fuel pressure
switch adapter. Operate the lift pump and when
the fuel flowing from the bleed screw is free of
air bubbles, tighten the screw.
4. Slacken the air bleed screw on the injection pump
governor housing. Operate the lift pump until the
fuel flowing from the bleed screw is free of air
bubbles, leave the bleed screw slack.
5. Slacken the air bleed screw on the injection pump
high-pressure banjo bolt. Operate the starter motor
with full throttle in the full run position and
when the fuel flowing from the high-pressure bleed
screw is free of air bubbles, tighten the bleed
screw.
6. Continue cranking the engine with the starter motor
to expel any air trapped in the governor and when
the fuel flowing from the governor housing bleed
screw is free of air bubbles, tighten the bleed
screw.
7. Slacken the union nut at the injector end of any
two high-pressure pipes. Operate the starter motor
with throttle in the full run position and when
the fuel flowing from both pipes is free of air
bubbles, tighten both union nuts.
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8. Start the engine and allow it to run until it is
firing on all cylinders or repeat step 7 if necessary.
9. Note:
If difficulty in starting occurs, the sea water in-
take valve must be closed to prevent filling of the
exhaust system with sea water. Immediately when
the engine starts, open the sea water intake valve
to prevent damage to the pump and engine.
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