FUEL
SYSTEM
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 manufac-
turer's instructions).
SPARES
While the likelihood
of
having to service the fuel system at
sea is slini, the possibility does
exist
Therefore, we recom-
mend that banjo washers, injector seat washers, and a fuel fil-
ter be carried on board at all times. Purchase needed spares
from your local
UNIVERSAL 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.
FUEL
LIFT
PUMP
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.
A
WARNING:
Do
not
allow
smoking
or
open
flames
near
the
fuel
system
when
servicing.
Also
provide
proper
ventilation.
'•
~·
FUEL
SYSTEM
BLEEDING
If
it becomes necessary to bleed air from the engine fuel
system, tum the panel key
ON
and interrnitently
(5
- 10
seconds). Activate the preheat circuit This activates the fuel
which draws fuel into the engine fuel system and drives
air
out via the fuel return.
If
the high pressure injector lines need to be bled, loosen the
injector line nut at each injector, open the throttle and crank
the engine over until fuel spurts from the nut and line. Then
secure the nuts and start the engine as normal
NOTE:
Do
not attempt this procedure
on
a hot
engine.
A
JIIARNING:
Always
wear
protective
clothing,
safety
glasses
and
gloves-when
bleeding
high
pressure
injector
lines.
FUEL
RETURN
LINE
SHUT-OFF
VALVE
[M-508]
A shut-off valve is located on the fuel return line near the
injection pump. This valve
must
be
fully open.
FUEL
SHUT·OFF
VALVE
Air
Cleaner/Silencer
Some p:NIVERSAL engines use a replaceable air filter ele-
ment
w~;apped
around a metal canister. This element can be
removed and brushed off or cleaned with an
air hose. When
it become too contaminated it can be replaced. The
canister
with its interior element should also
be
removed and cleaned
periodically.
Simply wash the assembled unit in a non-flam-
mable cleaning solvent Use this same cleaning procedure for
other
UNIVERSAL air cleaners that use a similar type canis-
ter.
NOTE:
To
operate efficiently a diesel engine must
intake
a
continuous volume
of
clear
air.
Hard starting,
an
erratic
idle,
and black exhaust smoke
are
all symptoms
of
a restricted air
intake.
FILTER
ELEMENT
AIR
CLEANER/SILENCER
[M·35B
SHOWN]
ELEMENT
AIR
CLEANER/SILENCER
[M·50B
SHOWN]
44
Unlvanal
MARINE POWER
19
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