Furuno GP-7000F Procedure for installing the thru-hull mount transducer, Transducer mounting

Procedure for installing the thru-hull mount transducer

1.With the boat hauled out of the water, mark the location chosen for mounting the transducer on the bottom of the hull.

2.If the hull is not level within 15° in any direction, fairing blocks made out of teak should be used between the transducer and hull, both inside and outside, to keep the transducer face parallel with the water line. Fabricate the fairing block as shown below and make the entire surface as smooth as possible to provide an undisturbed flow of water around the transducer. The fairing block should be smaller than the transducer itself to provide a channel to divert tur- bulent water around the sides of the transducer rather than over its face.

Fairing

Block

Hull

Hole for	BOW
stuffing tube

Upper Half

Lower Half

Saw along slope of hull.

Construction of fairing block

Flat Washer
Rubber Washer	Flat Washer
	Hull
	Rubber Washer

Deep-V Hull Flat Hull

Transducer mounting

3.Drill a hole just large enough to pass the threaded stuffing tube of the transducer through the hull, making sure it is drilled vertically.

4.Apply a sufficient amount of high quality caulking compound to the top surface of the trans- ducer, around the threads of the stuffing tube and inside the mounting hole (and fairing blocks if used) to ensure watertight mounting.

5.Mount the transducer and fairing blocks and tighten the locking nuts. Be sure that the trans- ducer is properly oriented and its working face is parallel to the waterline.

Note: Do not over-stress the stuffing tube and locking nuts through excessive tightening, since the wood block will swell when the boat is placed in the water. It is suggested that the nut be tight- ened lightly at installation and retightened several days after the boat has been launched.

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