NAVMAN
TRACKER 5507/5607
Installation and Operation Manual
38
7 The 5507/5607 then asks you to set the
throttle to achieve a vessel RPM. On a multi
engine boat set all engines to about the
vessel RPM. When the engine RPMs are
correct, the Vessel RPM box will turn green.
Now, do not change the engine speed.
Wait for about 60 seconds for the boat to
stabilise, ensuring the Vessel RPM box stays
green. Then press
. Wait while the fuel
computer records the data.
8 The 5507/5607 repeats the above step to
record data up to the maximum RPM. Then
the 5507/5607 asks if you want to save the
curve. Select Yes. The fuel computer asks for a
name for the curve. Change the default name
if required. Then press
. The 5507/5607
stores the new curve.
Note
To interrupt making the curve at any time,
press
.
10-6-1 Making a fuel consumption curve
To make a fuel consumption curve you will need
to run the boat in a straight line for about 15
minutes using the engine’s full RPM range. For
your first curve, choose a calm day with light
wind and little current; have a typical load and
a freshly cleaned hull. Later, you can make fuel
consumption curves for different boat, weather
or sea conditions. Compare these with your
first curve to see how your boat’s performance
changes with conditions.
Making a curve
1 Start running the boat in a straight line.
2 Choose a speed source for the curve (see
section 10-5-1). Normally choose Water speed
to measure the boat’s potential performance.
3 Press
twice, then select
Fuel
.
4 Select
Fuel consumption curve
, then
select
New
.
5 Enter the comfortable maximum RPM you
know you can achieve for the engine rather
than the maker’s value.
6 The 5507/5607 then asks you to set the
minimum RPM. Set the throttle to idle; on a
multi engine boat set all engines to about the
same idle RPM.
Now, do not change the engine speed.
Wait for about 60 seconds for the boat to
stabilise, then press
. Wait while the fuel
computer records the data.
10-6 Fuel consumption curves
A fuel consumption curve shows fuel consumption (fuel used per unit of distance travelled) and boat
speed as a function of engine RPM. Fuel consumption curves require engine RPM, which requires
SmartCraft™ or diesel sensors to be installed. Fuel consumption curves are powerful tools for assessing
boat performance in different conditions and for helping you to run at the most economical speed and
trim for the conditions.
