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15Tracker500/500i User Manual
9.0 Fuel Screen (Tracker500i only)
The Tracker500i has a comprehensive set of fuel management features. To utilise these
features you need only purchase a Navman fuel flow transducer. This plugs into the 5 pin
connector on the rear of the Tracker500i. For twin engine installations there is a kit
containing two fuel transducers and a ‘Y’ cable to enable both transducers to be connected
to the 5 pin connector.
The Navman fuel flow transducer has been specifically developed for use with petrol
inboard and outboard engines. It is best suited to outboards from 30 to 300hp, and inboard
engines from 45 to 450hp, but will operate outside these limits up to a maximum flow rate
of 130 litres (35 US gallons) per hour, per engine.
Running the engine without the Tracker500i turned on will result in fuel use not being
recorded. This will mean that the fuel remaining value will read higher than what is actually
in the tank. Always turn your Tracker500i on immediately after starting your engine.
To display the Fuel screen, select the FUEL function from the Main Selection screen.
Details of the Fuel screen are shown below.
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Flow rate averaging
An engine does not draw fuel from the tank at a steady rate. Normally it will draw fuel at a
relatively high rate for a few seconds until the carburettor bowl or fuel injection reservoir is
full, and then draw no fuel for a few seconds. If this instantaneous flow rate were displayed,
it would be too erratic to follow on screen. To improve the display, the Tracker500i averages
the fuel flow rate.
The amount of time over which the averaging is done can be changed in the Setup screen
(section 14.0 Setup). The ‘FLOW FLTR’ (flow filter) value reflects the number of seconds
The fuel used figure
indicates the volume of
fuel that the engine or
engines have consumed
in total since the figure
was last reset.
Highlight this line, then
press
to access reset
and calibration functions.
This indicates the
averaged flow rate
Current boat speed
The units selected in the Setup screen for
distance and fuel volume will be used to display
the figures in the most useful format for you.
The fuel remaining
amount is reduced as
the fuel runs through
the fuel transducer(s).
Highlight this line,
then press
to
change the value or
set the low level
alarm.
The economy reading
can enable you to
see the most fuel-
efficient speed to
travel at. This figure
is calculated from the
speed and flow rate.