Furuno FCV-38, Installation Manual

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1. MOUNTING
1-7
1.4 Transducer
The performance of the fish finder depends on the transducer position.
Refer to the drawing for transducer tank installation at the end of this manual. The
transducer tank T-625 (code: 000-037-649) should be prepared locally.
Mounting consideration
Note 1: Carefully handle the transducer. Do not lift the transducer by holding the ca-
ble, nor drop it.
Note 2: The gasket sizes in the thru-hull pipe are different for two types of CV-303.
When replacing the transducer, make sure that the gasket in the thru-hull pipe is ap-
plied with the cable.
If the gasket is required, arrange the appropriate gasket according to the cable diam-
eter.
• A place least affected by air bubbles should be selected since turbulence blocks the
sounding path.
• Select a place least influenced by engine noise.
• Select a place without other sounder interference. The transducer should be sepa-
rated from other transducers with the same frequency by 2.5 m or farther.
• Install the transducer face parallel to the sea surface.
• Orient the transducer bow mark to ship’s bow
within ±5 degree.
It is known that air bubbles are fewest at the
place where the bow first falls and the next
wave raises, at usual cruising speed. In small,
slow-speed boats, the position between 1/3 and
1/2 of the ship’s length from the bow is usually
a good place.
Refer to the installation drawing for the trans-
ducer, combined with the thru-hull pipe TFB-
1600.
Note: The face of the transducer must be facing the sea bottom in normal cruising
trim of the boat.
Cable
diameter
Color of data
sheet sticker*
Gasket of TFB-1600
Remarks
Name Type
22.0 mm Silver Gland gasket B 02-153-4204
19.4 mm White Gland gasket 02-153-4203 Cable for FCV-30
NOTICE
Do not install the transducer on the inner side of the hull.
The signal strength is reduced and may affect the accuracy of measurements.
Do not cover the transducer with FRP resin.
The heat generated when the resin hardens may damage the transducer.
For mounting the transducer, use a flange for transducer tank.
ø5
BOW
Transducer face
Bow mark