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FISH 4350 / 4380 Installation and Operation Manual 27

NAVMAN

12. Erratic Fuel Flow readings:

a) The fuel ß ow 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 Þ lter value is not suitable for the

engine. Check that the value is not set to zero,

then try increasing the value until a steady ß ow

rate is shown. See section 3-3 Setup > Fuel.

13. 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.

14. There is a double bottom trace

displayed:

a) The boat may be in an area that

generates shadows. See section 4-1

Interpreting the display.

b) In shallow water, the echoes may bounce.

Reduce the gain setting (see section 4-3

Gain).

c) Decrease the Range.

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Zoom 4350 Installationsanleitung Seite 27