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Northstar Explorer 538i/538 Installation and Operation Manual
60
Note: For the Explorer 538/538i to measure fuel
consumption, the optional fuel flow kit must be
fitted.
3-1 Fuel used or remaining seem inaccurate:
Explorer is not wired for auto power (see
section 15-4).
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 10-1).
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.
3-2 Flow indicates no fuel or low fuel:
a Check that the number of engines is set to 1
(see section 14-4).
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.
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.
3-3 A twin engine installation shows only one
flow rate:
a Check that the number of engines is set to 2
(see section 14-4).
3-4 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 14-4).
3-5 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.
B-3 Fuel consumption problems