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Old 23 January 2006, 05:19   #11
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i put a thru hull transducer in a pipe which i fixed to the inside of the hull, filled the pipe with some sort of cooking oil if i remember correctly and then had the transducer submerged in that, it can be quite a good way of fixing the transducer in there for a short period to see if you are happy with the results before going the whole hog. making sure there are no air bubbles either in the fixant or oil or in the fibreglass are critical for reasonable performance, you could silicone the tubing to the inside of the hull so it is easily removed. you need to find a good bit of fibreglass hull that will give you the performance you need that has no imperfections that will impact the signal etc
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Old 23 January 2006, 06:57   #12
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all of our beach launched fishing boats around here simply silicone the transducer onto the single layer of glass in the well at the transom. Then it doesnt get damaged by rocks and shingle on the beach and the silicone is easy to remove if you need to. It will work perfectly well without silicone and without any nasty oil in a tube if you just throw a bucketfull of water in the drain well and toss the transducer in there! Helps if you wedge it upright of course We used to do this with one of our fishing boats and then take the whole rig out when we went to Ireland with my mates boat so that we didnt have to run thru all that expensive paper on the one he had fitted-worked fine just thrown in a well full of water (transducer-not the top bit ! ). And No you dont need a shoot thru the hull type transducer to make it work As a passing thought we dumped our last hummingbird as it didnt want to know at speed-replaced it with a cheap (£70) eagle cuda-brilliant, works at all speeds, the shallow water alarm is a godsend round here, and transducer is simply siliconed in the well! Got two now and they are both fine after over a years hard work.
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Old 23 January 2006, 07:20   #13
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Yup silicon for me too. 200ft and 35knts no problem. I used to cast a block of resin in the well and set the transducer into that, it worked fine, but silicon seems to be just as effective.
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Old 23 January 2006, 07:34   #14
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i did it this way rather than throwing a bucket of water int here because i have a large space under the floor that is dry where the fuel tank is and no bilge pump exists, so fitting a pipe with silicone was a good/only option for me. It was in there for years working fine!

I would suggest using silicone as well as you can then remove it and fit it else where if needed, if you use a more permanent fixing they you are somewhat buggered if you need ot move it.


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Originally Posted by Hugh Jardon
i put a thru hull transducer in a pipe which i fixed to the inside of the hull, filled the pipe with some sort of cooking oil if i remember correctly and then had the transducer submerged in that, it can be quite a good way of fixing the transducer in there for a short period to see if you are happy with the results before going the whole hog. making sure there are no air bubbles either in the fixant or oil or in the fibreglass are critical for reasonable performance, you could silicone the tubing to the inside of the hull so it is easily removed. you need to find a good bit of fibreglass hull that will give you the performance you need that has no imperfections that will impact the signal etc
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Old 23 January 2006, 14:26   #15
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sounds like sound advice guys, using silicone to fix it in the engine well, then test to see how its reading go, and if it doesnt work well after many positions, get a different fishfinder like wavelength did! i have to admit the sound of using silicone is much more attractive, no need to drill permanent holes, and using tough epoxy which is a bugger to get off! thats one of the many pre season jobs with a possible solution, cheers
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Old 23 January 2006, 17:16   #16
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many people i have heard have had sucsess with silicone but my old man tried it and had terrible results. I would like to know the difference between what he did and what those that had good results did.

my advice would be to try with just placing it in a pool of water and if you are happy - then try silicone.

if you cant get good results with the silicone - at least you can peel it off and try epoxy last.
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Old 23 January 2006, 17:51   #17
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thin silicone and avoid air bubbles
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Old 23 January 2006, 19:11   #18
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Wavelength, you beat me to it. No air. Skoosh the silicon smoothly and continuously. If the transducer is not in the centre, you may need to support it while the silicon cures because you do need it square to the sea or your depth reading will be inaccurate.
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