Furuno Ls4100 manual Transom Mount Transducer, Transducer preparation, 520-5PWD

Hole for	BOW
stuffing tube

Upper Half

Lower Half

Saw along slope of hull.

Construction of fairing block

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 transducer, 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 transducer 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 tightened lightly at installation and retightened several days after the boat has been launched.

Transducer preparation

Before putting the boat in water, wipe the face of the transducer thoroughly with a detergent liquid soap. This will lessen the time necessary for the transducer to have good contact with the water. Otherwise the time required for complete “saturation” ill be lengthened and performance will be reduced.

DO NOT paint the transducer. Performance will be affected.

4.3Transom Mount Transducer

The transom mount transducer 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 propeller ahead of the transducer.

520-5PWD

There are two methods of installation: flush with hull (for flat hulls) and projecting from hull (for deep V-hulls).

	D
D>50 cm
		Deep-V
Flat Hull		Hull

520-5PWD mounting locations

Installing the 520-5PWD on a flat hull

A suitable mounting location is at least 50 cm away from the engine and where the water flow is smooth.

1.Drill four pilot holes in the mounting location.

2.Attach the transducer to the bracket with 5 x 20 tapping screws (supplied).

3.Adjust the transducer position so the transducer faces right to the bottom.

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