NorthStar Navigation Explorer 660 - Manual (Page 54)

Northstar Explorer 660 Installation and Operation Manual 54
These features can be used only when the optional
single or twin engine fuel kit has been installed. Press
MENU once or more until the Setup menu is
displayed, then select Fuel:
! WARNING
Northstar fuel kits are only suitable for
petrol/gasoline engines. Fuel consumption
can change drastically depending upon the
boat loading and the sea conditions. Always
carry adequate fuel for the journey, plus
a reserve.
It is recommended that the fuel tank capacity is
measured by draining the fuel tank, then filling it
to capacity. After filling, note the reading from the
fuel dispenser’s gauge.
Note: Beware of air pockets, especially in underfloor
tanks.
Tank full
Select Tank full each time the fuel tank(s)
are completely refilled. When asked Are you
sure? select Yes. Otherwise, the Fuel display
and the Low Fuel Alarm are meaningless.
Set remaining
Before doing a partial refill of the tank or removing
fuel manually from the tank (for example, by
siphoning it off):
1. Note the Remaining reading on the Fuel
display.
2. Note how much fuel is added or removed.
3. Calculate how much fuel is now in the tank.
4. Select Set remaining and update the
reading.
It is essential to do this whenever some fuel is
added or removed. Otherwise, the Fuel display
and the Low Fuel Alarm are meaningless.
15-5 Setup > Fuel
Clear Used
Select Clear used to set Used (the amount
of fuel used) to zero. Do this to start measuring
the amount of fuel used over a certain time or
distance.
When asked Are you sure? select Yes.
Tank size
Enter the capacity of the fuel tank.
Num. engines
Set the number of engines to 0, 1 or 2. If 0 is
selected the fuel features are turned off.
Calibrate
See section 15-11 Setup > Calibrate, for information
about calibrating the fuel transducer(s).
Flow filter
Most engines do not draw fuel from the tank at a
steady rate. To give a stable fuel flow reading, the
Explorer 660 calculates the flow value(s) by taking
several measurements and averaging them. Use
the Flow filter to set the period over which the
fuel flow is averaged.
The Flow filter can be set from 0 to 30 seconds.
Use the lowest value which gives a stable flow.
Usually a value of 5 to 10 seconds will give a
satisfactory result for two-stroke carburettor
engines. Fuel injected or four-stroke engines may
require a larger value.
This setting affects the Fuel flow and Fuel
economy reading on the Fuel display but it does
not affect the Fuel used reading.