Northstar
FISH 457/467
Installation and Operation Manual
30
7 Fuel functions and display
The Fuel functions require optional petrol/gasoline, diesel or SmartCraft fuel sensors to be installed and
set up.
Each engine has a flow sensor installed to
measure the engine’s fuel flow.
The 457/467 uses these flows, together with boat
speed and engine RPM if available to estimate the
fuel remaining in the tank(s), fuel used, range and
fuel economy. This data is displayed on the fuel
window (see section 7-2).
You can:
display the fuel used during a trip
(seesection 7-2)
set low fuel alarms (see section 7-4)
make fuel consumption curves - graphs
of fuel consumption and boat speed as a
function of engine RPM - to monitor and
optimise boat performance.
(see section 7-6)
7-2 Fuel window
To go to the Fuel window, press
, select
More
, then select
Fuel
.
The display differs according to the number of
engines and tanks. If engine RPM is available
and if you have made and selected a Fuel
Consumption Curve (see section 7-6), press
to switch between a Summary or a Fuel curve
display.
The Fuel window shows
Speed
To select a boat speed sensor, see section 7-5-1.
RPM (if available)
If engine RPM is not available, the display shows
depth.
Remaining
The fuel remaining in the tank(s) is shown as a
vertical gauge on the right of the display. The
height of the yellow bar(s) show how much fuel
remains in the tank(s). If you have set a low fuel
alarm (see section 7-4), a red bar shows the level
at which the alarm will trigger. If there are two
tanks, the left bar shows the port tank, the right
bar shows the starboard tank.
7-1 What the fuel computer does
Used
The fuel used during a trip. On a multi-engine
boat, the data for the port engine is on the left of
the display.
When you want to start measuring how much
fuel is used, go to the Fuel window and:
In a single engine boat, press
and
select
Clear used
.
In a multi-engine boat, the fuel used by each
engine and the total fuel used are shown.
Press
, select
Clear used
and
select:
Port
or
Starboard
to clear the fuel
used by one engine
Both to clear the total fuel used.
Fuel flow
The fuel flow for the engine(s). On a multi engine
boat, the data for the port engine is on the left
of the display. Use the flows to check the load of
each engine.
!
WARNING
To ensure the fuel data is accurate:
When you add or remove fuel from a tank,
tell the 457/467 (see section 7-3)
If the boat has petrol/gasoline sensors,
calibrate them during installation or if the
fuel readings seem inaccurate (see section
7-7)
Choose an appropriate type of boat speed
sensor to calculate economy, range and the
fuel consumption curve (see section 7-5)
If the boat uses a paddlewheel sensor
to measure speed, calibrate it during
installation or if the speed readings
seem inaccurate.
