NorthStar Navigation Explorer 660 - Manual (Page 73)

Northstar Explorer 660 Installation and Operation Manual 73
Note: For the Explorer 660 to measure fuel
consumption, the optional fuel flow kit must be
fitted.
4-1 Fuel used or remaining seem inaccurate:
a If the engine is run while the Explorer 660
is powered off, the Explorer 660 does not
record the amount of fuel used during
that engine run. Consequently, the Fuel
remaining value will be higher than the
actual amount of fuel remaining in the tank.
To avoid this problem, use the Auto Power
Wiring option (see section 16-5). This
ensures that the Explorer 660 powers on
automatically whenever the boat’s ignition is
switched on.
b In rough seas, fuel may surge back and forth
through the fuel transducer, resulting in
incorrect readings. Try installing a one-way
valve between the fuel transducer and the
fuel tank.
c The Set remaining fuel value must be
reset after every refuelling (see section 15-5).
d The fuel tank may not refill to the same capacity
each time due to air pockets. This is particularly
noticable with underfloor tanks.
e Fuel transducers wear out over time and
should be replaced after every 5000 litres of
fuel.
4-2 Flow indicates no fuel or low fuel:
a Check that the number of engines is set to 1
(see section 15-5).
b Check that the fuel cable connectors are
securely plugged in and the collar is locked
in place. The collar must be locked in place to
give a watertight connection.
c A fuel transducer may be clogged. If so,
remove the transducer from the fuel line
and gently blow through it in the opposite
direction to the fuel flow.
A fuel filter between the fuel transducer and
the fuel tank must be installed as per the fuel
installation guide. Failure to do so will void
the warranty.
B-4 Fuel consumption problems
d Inspect the fuel cable from end to end for
damage such as cuts, breaks, trapped or
squashed sections.
e Check that the fuel filter is clean.
4-3 A twin engine installation shows only one
flow rate:
a Check that the number of engines is set to 2
(see section 15-5)
4-4 Erratic Fuel Flow readings:
a The fuel flow transducer may have been
mounted too close to the fuel pump or may
be subject to excessive vibration. Refer to the
installation instructions supplied with the fuel
transducer.
b Check for leaks in the fuel line or in the fuel
pickup in the tank.
c The Flow filter value is not suitable for
the engine. Check that the value is not set
to zero, then try increasing the value until a
steady flow rate is shown (see section 15-5)
4-5 There is no reading for fuel economy:
a The boat must be travelling through the
water to generate an Economy reading.
b Check that the paddlewheel on the
transducer is spinning freely and that the two
magnets in the paddlewheel are still in place.