Furuno GP-1610CF Operator's Manual page 27

Installing the transom mount transducer
This type of mounting is very commonly employed, usually on
relatively small I/O or outboard boats. Do not use this method on
an inboard motor boat because turbulence is created by the propel-
ler ahead of the transducer.
There are two methods of installation: flush with hull (for flat hulls)
and projecting from hull (for deep V-hulls).
D
D>50 cm
Flat Hull
Figure 1-23 Transom mount transducer mounting locations
Installing the transom mount transducer flush with hull (for
flat hulls)
A suitable mounting location is at least 50 cm away from the en-
gine and where the water flow is smooth.
1. Drill four pilot holes in the mounting location.
2. Attach the transducer to the bracket with tapping screws (sup-
plied).
3. Adjust the transducer position so the transducer faces right to
the seabed.
Note: If necessary, to improve water flow and minimize air
bubbles staying on the transducer face, incline the transducer
about 5 at the rear. This may require a certain amount of
experimentation for fine tuning at high cruising speeds.
4. Fill the gap between the wedge front of the transducer and tran-
som with epoxy material to eliminate any air spaces.
Deep V-hull
1-17