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5. Next a small amount of adhesive filler is to be mixed (Plastic Padding or similar).
IMPORTANT
The effectiveness of filler is not improved by using increased amount of hardener; therefore do not exceed the stated
amount. (If the hardener tube is used up before the large tube, then a considerable excess of hardener has been used).
DO NOT MIX MORE FILLER THAN CAN BE USED IN 5 MINUTES.
Punch a hole in the nozzle of the small tube marked “Hardener” by using the reverse side of the cap. (Do not enlarge the
hole). Squeeze out an equal length from each tube onto a piece of glass, hardboard or similar, and mix thoroughly. (See
illustration 1 and 2 on the side of the large tube).
Locate tube in the chosen position and apply filler with a knife blade in 3 or 4 places around the tube. See illustration 5.
Leave to set hard, 15 minutes approximately.
6. When the tube has set rigid, mix further filler to instructions and with a firm pressure apply to the hull around the tube. See
illustration 6. Then repeat the process around the tube itself on the previously roughened surface. See illustration 7. A further
mix is then required to complete the fixing of the tube by building up a fillet all around as shown in illustration 8.
7. Take the transducer, remove the top nut from the threaded stem taking it over the plug at the end of the co-axial cable. Place
the transducer into the tube and adjust the remaining nut level with the top of the tube. See illustration 9. Remove the
transducer from the tube and pa the co-axial plug through the inside of the top cap, and pass it over the transducer stem. Next
pass the co-axial plug through the nut previously removed and thread it down the transducer stem until it reaches the top cap,
and tighten, holding the inner nut to stop it turning. See illustration 10.
8. Pour the oil into the tube fixed to the hull so that it is not more than half full.Check that there are no oil leaks from the
moulding that joins the tube to the hull. Push the transducer SLOWLY into the tube, having first removed the self-tapping
screw from the housing cap. When the transducer is in place with the face touching the inside of the hull, replace the self-
tapping screw. Push the co-axial transducer plug firmly into the back of the Seafarer. The system is now ready for use. See
illustrations 11 & 12.
NOTES
a. By adopting the above method of in-hull echo sounding the pattern of ultrasonic sound emitted by the crystal in the
transducer remains at a p proximately 45 in a conical shape. If the transducer and its tube housing are installed vertically,
therefore, accurate depth indication will be given up to a heel angle of 22½ (dependent upon the thickness and quality of hull
material).
/continued ……
13


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  • Is it possible to buy a replacement face dial for my Seafarer 700 echo sounder? and if yes, where?
    Thanks, Mike FitzG Submitted on 16-11-2021 at 15:47

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