v1.0
Owner’s Manual
Fuel System - 24
Viking Sport Cruiser 61FY
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Separ Fuel Filters
Fuel must be filtered to remove water droplets, rust, al-
gae, asphaltines, varnishes and algae – all prevalent in
diesel fuel today.
How they work
Fuel is sucked out of the tanks, into Separ 2000 fuel fil-
ters, a pair for each engine. Usually only one filter in a pair
is selected, the other being spare. The raw fuel spins rap-
idly inside the bowl and the centrifugal action separates
out large particles of dirt and water droplets (30 microns
and larger) which are thrown into the centre of the bowl,
and collect at the bottom. These you will see and can
drain out.
The fuel continues to spin and enters the top filter ele-
ment, which is usually 30 microns.
Sensors
G
trigger an alarm if water in the bowl rises to the
sensor level. It must be drained as soon as possible. At
high injector pressures water can turn to steam and damage
the injectors.
If the helm water-in-fuel alarm
(icon inset)
goes off you must
take action. Most commonly, you will use selection lever
L
to close the contaminated filter and swith over to the spare.
However, the contamination must be dealt with
before reactivating the unit – usually by
“backflushing” the affected filter (see next sec-
tion and your Separ manual.)
Be very careful if backflushing a
Separ while underway – you are
close to a spinning shaft and any
fuel that might spill is a fire hazard.
Bleed Screw
Clean Fuel Out
Raw Fuel In
Swirling action
separates out
dirt and water
droplets which
settle in the
bowl.
Filter Element
→
←
←
Water and dirt
contaminated
fuel can be
drained into a
fuel-safe con-
tainer.
Backflushing
If you suspect dirt and water are blocking the filter me-
dia and reducing fuel flow to the engines, the Separs
can be partially cleared by backflushing. This can be
while underway if
absolutely necessary.
Move the selection lever fully to the spare filter (i.e.,
close the filter to be backflushed). Open bleed screw
E
at the top of the closed filter. Air will enter, and fuel
will flow back through the filter. Assisted by gravity,
contaminants will fall to the bottom of the glass bowl
for draining.
To drain, push IN and TURN drain valve
F
; catch fuel in
a suitable container until flow is clear. Close drain valve.
Close bleed valve
E
. DO NOT OVER-TIGHTEN. Check
for leaks.
Separ 2000 filter pair - selection lever
Lever
L
selects which filter unit to use. In this photo
the position of the lever shows the filter at left is in
use. The bleed screw
E
is for backflushing, and valve
F
for draining the bowl.
G
is excessive water sensor.
→
→
F
G
E
L
IN USE
SPARE
