Specifications

Simrad NX40/45 Installation and Operation Manual92
19-6 Setup > Fuel
> Fuel
Note: Fuel functions require fuel flow sensors to
be installed.
Source Select the fuel flow sensors to use
if the boat has more than one set of
fuel sensors. Normally select Auto.
Num engines Set the number of engines, or select
0 to disable the fuel functions. If
there are two engines they are called
port and starboard.
Num tanks Set the number of fuel tanks. If there
are two tanks they are called port
and starboard.
Setup engines If the boat has more than one engine,
select Engine and select each engine
in turn.
For the selected engine, enter:
From tank: The tank the engine is connected to.
Flow filter: Most engines do not draw fuel from
the tank at a steady rate. To give a
stable fuel flow reading, the NX40/45
calculates the flow 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
carburetor 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.
Setup tanks If the boat has more than one tank,
select Tank and select each tank in
turn.
For the selected tank, you can enter:
Tank size: The tank capacity. Simrad
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.
Fuel alarm
Fuel consumption curve