4 setup > fuel – NorthStar Navigation Explorer 538i User Manual

Page 44

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Northstar Explorer 538i/538 Installation and Operation Manual

44

Fuel setup requires optional petrol/gasoline
or SmartCraft sensors to be installed. Set

Num

engines

first to enable the fuel functions.

Press

one or more times until the

Setup

menu is displayed, then select

Fuel:

Tank full

Tells the Explorer 538/538i you have filled a fuel
tank (see section 10-1).

Set remaining

Tells the Explorer 538/538i you have added or
removed fuel (see section 10-1).

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.

Tank size

Enter the capacity of the fuel tank. Northstar
recommends measuring tank size by draining
the fuel tank, filling it to capacity and using the
fuel dispenser’s reading. Beware of air pockets,
especially in underfloor tanks.

Num. engines

Set the number of engines to

0,

1

or

2.

If

0

is

selected the fuel features are turned off.

14-4 Setup > Fuel

Calibrate

SmartCraft fuel sensors are factory calibrated
and should never need recalibrating. Calibrating
Northstar petrol/gasoline sensors gives more
accurate fuel values.

Twin engine installations require each fuel
transducer to be calibrated. This can be done
at the same time with two portable tanks or at
different times using one portable tank.

Calibrating the fuel transducer(s) requires
accurate measurement of the fuel consumption.
This is best done using a small portable tank. At
least 4 gallons (15 litres) of fuel should be used to
ensure an accurate calibration.

It is often very difficult to fill underfloor tanks to
the same level twice due to air pockets, so the
more fuel used, the more accurate the calibration.

To calibrate the fuel transducer(s), perform the
following steps:

1. Record the level of the fuel in the tank(s).

2. Connect the portable tank(s) to the engine

through the fuel transducer(s).

3. Run the engine at normal cruising speed until

at least 4 gallons (15 litres) of fuel has been
used per engine.

4. Check the actual amount of fuel used per

engine by refilling the portable tank(s) to the
original level and noting the reading(s) from
the fuel dispenser’s gauge.

5. Select

Fuel.

Use the cursor keys to change

the reading for each engine to match that on
the fuel dispenser’s gauge.

6. Press

when the reading is correct.

Note: If the fuel calibration options appear to
give erroneous readings after a while, first check
that the fuel sensor has been installed correctly
according to the installation instructions supplied
with it, then see Appendix B - Troubleshooting.

Flow filter

Most engines do not draw fuel from the tank at
a steady rate. To give a stable fuel flow reading,
the Explorer 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.

Fuel consumption can change drastically
depending upon the boat loading and the sea
conditions. Always carry adequate fuel for the
journey, plus a reserve.

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