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Old 28 July 2014, 15:04   #1
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Where & how to install & be able to easily remove my Lowrance Elite-4XHDI Transducer

Hi,

Can someone please help me, as I want to install my Lowarnce Elite-4XHDI Transducer on my boat which is a Zodiac Futura 4.2mtr,

I have attached some photos below, I would like to be able to remove and install my transducer on each outing to prevent damage etc, so all home made fishifinder / transducer mounting photo adaptions would be appreciated, I have monuted the fish finder on my wooden seat already then I will probaly bungee strap my battery / tupperware box to the seat as well,

I want to be able to easily adjust the height of the transducer if needed incase of interference etc, or until I find the perfect easily removable mounting, with me living far away from the sea makes it difficult for me just to test it out etc,

Like a boy in a toy shop I want to be able to use my fish finder when I am next out but I want to make sure the transducer is secure on the boat when zipping around etc, I don't really like the idea of a G clamp so I was thiniking I could use maybe the screw holes that I use for my launching wheels that I never use,

I might be asking a silly question but is it the very bottom of my transducer that the signal comes from or is it the thin bit at the front, the reason I ask that is the transducer is supposed to see what is directly under the boat, but If I am correct when the transducer would be mounted somehow it would be pointing at the rear of the boat?

Firstly I am not sure how far I need to put the transducer in the water as the supplier I purchased it from advised over the phone, half of it should be in the water and half sticking out, I believe he means the thin rectangler bit at the front of the transducer that is at the front 25mm depth by 55mm wide,

So if I understand the supplier correctly I would say I would have 12.5mm x 27.5mm sticking in the water and the other half sticking out of the water, it doesn't sound right to me? I may be wrong of course, Personally, I would think you would need to have the whole transducer in the water to obtain the best sonar signal,

When I look in the transducer instalation instructions it advises that the transducer must be in the water at all times, and in a location that has a smooth flow of water when the boat is moving, so who is right the dealer I bought it from or the supplier instructions,

P.s I caught a Conger eel on a fresh mackeral head anchored about 1/2 a mile out in front of Brighton pier a few days ago, my bait was only in the water about ten minutes, quite shallow water which suprised me, I defiantlery did not expect to catch a Conger as I was looking for a hungry Bass,

Thanks to the son in law he lost it trying to haul it aboard the boat, I could of chucked him overboard believe me, it is only the 2nd conger I have caught in my life (41 years) considering I had it at the side of the boat for a few minutes while we cleared the boat as I thought it is going to be a mission to kill it, so thought best tidy up and make a space for it jumping around, It will teach me to let him bring my fish aboard when he volunteered, and secondly I best purchase a net,

all help and photos greatfully received,

Regards Shaun
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Old 29 July 2014, 14:49   #2
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RIBase
Fix the sensor to a plastic plate with V-bolts so the backside is flat. Than fix it with Sikaflex to the transom outside.
Before fixing it permanent, you can "hang" it at the topside of the transom to discover the correct height.

What you also can try, which works at my boat, position it in the bildge and lay a small bag of sand on top so it wil be in place. Put some water in the bildge and test if it works.

If it works fine, "glue" it with Sikaflex (be shure there are no airbubbels in the Sikaflex).

Advantage: no holes in the transom, and also good depth at higher speed..
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Old 29 July 2014, 14:59   #3
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Quote:
Originally Posted by scubaqua View Post
Fix the sensor to a plastic plate with V-bolts so the backside is flat. Than fix it with Sikaflex to the transom outside.
I have done it like that in the past but instead of using sikaflex I used some heavy duty duct tape on the plate, easily adjustable/removable
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Old 29 July 2014, 15:14   #4
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Just done this very job

Mine is a Garmin 451s but the transducer looks the same.

First pic my finger is pointing at the bottom of the transom just so you can make it out, 2nd pic shows the transducer pulled up out of the way that is what it is designed to do its on a 'ratchet type bracket'.

If I remember correctly it should be 8mm below the bottom.


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HTH
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Old 29 July 2014, 15:22   #5
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If you want it to be removable, you'll need to do something like the following:

Cut a piece of wood (or thickish aluminum sheet), and fix a rib so it won't flex. Mount the transducer to the bottom, with the bracket screws as close to the edge as practical (transducer body should extend well below the edge of the board.) Mount the board to your transom using C-Clamps or similar.

The transducer sends and receives its signal through the face, which is the flat part opposite the mounting "arm". They typically have a beam angle of somewhere around 15 to 20 degrees, but will read the first impulse returned, so you can't really say it's looking "directly below the hull"; rather it's looking at the entire beam and showing the shallowest part (though if you have some lower density stuff above higher density stuff you may get a double return.)

Hope this helps;

jky
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Old 29 July 2014, 17:37   #6
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Hi all,
Thank you for all your responses, I was scouring B & Q etc today to look for a solution, I was going to go for a wooden 3 x 2" for the stiffness and then I was thinking it would not last long and rot away,

the sound of plastic sounds a better idea, just done a Google and found the below pic, So I think I now understand what the supplier was saying over the phone looking at the diagram, is the below pic basically how I have to have it on my boat as the transducer is not fully in the water looking at the diagram, also do you tighten the ratchet nuts up at the end on the transducer or are they meant to be slightly loose so you can tilt the transducer if needed?

Transom Mounting the fish finder transducer for best obstruction free performance.
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Old 29 July 2014, 19:24   #7
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*Shrugs* I mounted mine to the transom and leave it there. The wiring is left routed to my electronics tower. It clears my tie downs on my busy transom. You probably already know this but it needs to mount on the starboard side in order to avoid prop turbulence.

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Old 29 July 2014, 19:49   #8
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Hi Peter,
Thanks for your photo, I would prefer to leave it mounted on the boat but I am more worried of damaging it by launching and retrieving etc, so I would prefer it to be removable, just looking at your pipe coming out of your drain hole, do you rig a pump on the top of it to get rid of any water inside the boat while out at sea etc?
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Old 30 July 2014, 01:14   #9
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No where between the drain plug and the wheel mounting pin can the transducer come in contact with your trailer bunk as it is far enough away isn't it? Can the boat slide over? If it can I would recommend side bunks to keep it centered. Do you tie the stern of the boat down? I wouldn't recommend towing any boat without a minimum of three tie downs.

Yes I put a bilge pump in to get rid of water right before pulling the already heavy boat up the beach on it's launching wheels. We tend to drag a lot of water into the boat with our drysuits and scuba gear.
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Old 30 July 2014, 09:16   #10
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Shaun, the ratchets on the pivots are there in case the transducer hits something at speed - allows the transducer to kick up out of the way instead of breaking at the arm (from experience, it doesn't always work that way, which is why my last transducer spent the last 3 years of its life as a large blob of wire-reinforced epoxy.)

Pivoting the transducer intentionally won't really get you anything (other than less of a lock on the bottom), as it will still read the nearest echo. In other words, it's not really "amiable".

Pete: Nice setup with the bilge pump. Wish I had had that on my Achilles.

jky
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