NorthStar Navigation 435 Tank full, Set remaining, Clear Used, Tank size, Num. engines, Calibrate

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 reading on the Fuel display (see section 5-5 Fuel Display) and the Low Fuel Alarm (see section

3-6 Setup > Alarms) 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 reading on the Fuel display (see section 5-5 Fuel Display) and the Low Fuel Alarm (see section

3-6 Setup > Alarms) are meaningless.

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 3-9 Setup > Calibrate.

Flow filter

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

For twin engine installations, the fuel flow for each engine must be adjusted separately.

The Flow filter can be set from 0 to 10 seconds. Use the lowest value which gives a stable flow. Usually a value of 5 seconds (default setting) will give a satisfactory result for two-stroke carburettor engines.

This setting affects the Fuel flow and Fuel economy reading on the Fuel display (see section 5-5. Fuel display) but it does not affect the Fuel used reading.

3-4 Setup > Data

Press MENU twice to display the Setup menu, then select Data:

Data setup

To change data items (Explorer 438 only):

1.Select Data setup, and press

2.Use or to move from data field to data field.

3.Press at any data field to show the list of data items that can be displayed there.

4.Highlight the required data item and press . The data item is immediately displayed in that data field.

5.Press or MENU when finished.

Time base

To change the Time base of the temperature graph, select Time base and press . Choose between 5 mins, 10 mins, 20 mins, 1 hour and 2 hours and press to confirm.

Northstar Explorer 435/438 Installation and Operation Manual 13