Installation manual
FUEL
SYSTEM
(Continued)
FUEL
ADDITIVES
If
fungus or bacteria is causing fuel problems, you should
have an authorized dealer correct these problems. Then
use a diesel fuel biocide to sterilize the fuel (follow the
manufacturer's instructions).
SPARES
While the likelihood
of
having to service the fuel system
at sea is slim, the possibility does exist. Therefore, we
recommend that banjo washers, injector seat washers,
and a fuel filter be carried on board at all times. (See the
Spares
And
Accessories brochure"). Purchase needed
spares from your local WESTERBEKE dealer or
distributor.
If
a leak should develop at a banjo washer
that cannot be corrected by a simple tightening
of
the
fitting, replace the sealing washer with a replacement
found in the engine fuel hardware kit for your model.
PRIMING
(BLEEDING)
THE
FUEL
SYSTEM
The on-engine fuel system is virtually self priming.
Under ordinary circumstances the engine's electric fuel
lift pump, which is energized by the key switch/preheat
button, will supply a continuous flow
of
fuel from the
tank. This fuel is drawn through the fuel/water separator
to the engine lift pump, the primary spin-on fuel filter,
and the injection pump.
FUEL
LIFT
PUMP
A
WARNING:
00
not
allow
smoking
or
open
flames
near
the
fuel
system
when
servicing.
Also
provide
proper
ventilation.
If
it becomes necessary to bleed air from the system, use
the following procedure:
Open the bleed screw by turning the thumbscrew on
the fuel filter 1 or 2 turns. Energize the preheat button
(key
ON) for 10 to 20 seconds or do it manually using
the palm
of
your hand to pump the primer pump on the
top
of
the fuel filter housing. When fuel flows freely
from the bleed screw, tighten, but do not overtighten,
the screw.
17
A
CAUTION:
When
using
the
preheat
function,
keep
in
mind
that
the
preheat
elements
(glow
plugs)
are
also
energized;
take
care
not
to
overheat
them!
Once the fuel filter assembly is free
of
air and the bleed
screw tightened, use the preheat button
or
slowly pump
the primer pump for
10 to 20 seconds to force any air
between the filter housing and injection pump out
of
the
system to the tank via the return line.
In cases where excessive amounts
of
air exist in the
fuel system, follow the above procedure but in addition,
loosen all the high pressure injector lines (not injectors)
and crank the engine starter motor;
as
fuel spurts from
between the nut and the line, tighten the injector lines in
sequence and then tighten the bleed screw.
NOTE:
Do
not
attempt this procedure on a hot engine.
A
WARNING:
Always
wear
protective
clothing,
safety
glasses
and
gloves
when
bleeding
high
pres-
sure
injector
lines.
AIR
CLEANER
Dual air cleaner filters are located on the top
of
the
engine manifold. These filters should be inspected,
cleaned, and/or replaced at maintenance periods. With
the engine turned off, remove the single hex bolt, lift the
manifold top, and the dual air cleaner filters become
accessible. When reassembling, make certain the filters
are positioned properly, and do not overtighten when
refastening the bolt.
AIR
CLEANER