Humminbird Side Imaging Forums
General => General Discussion => Topic started by: espenrekdal on June 08, 2010, 07:31:11 PM
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Hi all,
I have been trying to mount a quadrabeam transducer on a old inshore trolling boat. I thought I had been following the instructions from humminbird pretty well and I was pretty confident it would work before I took the boat out for a tryout a few days ago. The site chosen is probably not ideal, but its were I fish.
1. Very sharp fall offs from a few meters to about 200-300m (600-900ft).
2. Freshwater on the top and salty under.
3. Sharp thermoclines.
4. Some wave action.
I had intermittent bottom contact at 83khz down to about 120m, but for the most part I had problems when the depth exceeded 50m. I had no contact when the boat had above trolling speeds. I had no problems finding my cannonball on the screen and I did see some exciting curves here and there down to about 40m. Could it be the angle of the transducer?
I have tried the position shown on the images and a lower position, but it did not show any noticeable difference. Can this be attributed to bad conditions or should I look for a better position of the transducer. I do think there could be some air moving along the bottom of the hull. Should i move it to a position just in front of the engine? Any ideas?
Thanks!
Espen.
[attachment=1][attachment=2][attachment=3]
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In the top image, the transducer is definitely too high. And as for the position, while the boat is moving, you need to look for a spot with the cleanest/ least amount of turbulent water. Usually the strake is ideal, but you have a very unique looking hull there. An In-Hull transducer may work better.
As for losing bottom at deeper depth, this could certainly be the angle of the transducer.
Good Luck,
Robert
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Usually the strake is ideal, but you have a very unique looking hull there. An In-Hull transducer may work better.
Thanks Robert!
Being Norwegian I'm not sure what the word strake means in this context. Do you mean the keel strake? Should i try to mount it as deep as possible just in front of the engine?
I see quite a few of you mount the SI transducers this way.
Thanks,
Espen.
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I have the same transducer on my bass boat. You can put it as close to the motor as you like and down and far as you can go. As long as it will not hit the motor when you turn the engine and make sure it will not hit the trailer when you load and unload the boat. I have mine with a slight down angle.
just remember your boat dosen't sit level in the water. Check the angle your boat sits and use it to determine your angle. Hope it helps.