Transducer; Water Temperature/Speed Sensor - Furuno FCV-288 Operator's Manual

4. INSTALLATION
4.3

Transducer

The performance of the echo sounder depends upon the transducer position. A place least affect-
ed by air bubbles should be selected since turbulence blocks the sounding path. Further, select a
place least influenced by engine noise. It is known that air bubbles are fewest at the place where
the bow first falls and the next wave rises, at usual cruising speed.
Note: The face of the transducer must be facing the sea bottom in normal cruising trim of the boat.
4.4

Water Temperature/Speed Sensor

Through-hull mount water temperature/speed sensor ST-02MSB, ST02-PSB
Select a suitable mounting location considering the following:
• Select a mid-boat flat position. The sensor does not have to be installed perfectly perpendicular.
The sensor must not be located where it might get damaged in dry-docking operation.
• Select a place apart from equipment generating heat.
• Select a place in the forward direction viewing from the drain hole, to allow for circulation of cool-
ing water.
• Select a place free from vibration.
1. Dry-dock the boat.
2. Make a hole of approx. 51 mm diameter.
3. Unfasten the locknut and remove the flange of the sensor.
4. Apply high-grade sealant to the flange of the sensor.
5. Pass the sensor casing through the hole.
6. Face the notch on the sensor toward boat's bow and tighten the flange.
7. Set the sensor section to the sensor casing and tighten the locknut.
8. Launch the boat and check for water leakage around the sensor.
Water temperature/speed sensor ST-02MSB, ST-02PSB
Face "notch"
toward bow.
Flange nut
Coat with
marine sealant.
Brim
28
Locknut
51
123
ø77