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LSS-2 transducer mount position

Old 08-11-2013, 11:22 PM
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Default LSS-2 transducer mount position

Hi All,

I have a Webster Twinfisher (twin hull, one engine) 5.2m runabout. I have a Lowrance HDS-10 Gen 1 with the transducer mounted on the starboard side, on the transducer bracket.

Have purchased the Structure Scan and LSS-2 transducer.

Seems to be two options for mounting this.

1. Move existing transducer up and to right on the bracket, mount LSS-2 on same bracket.

2. Leave existing transducer in location. Mount Lss-2 onto back of hull to left of the drain hole.

Option 1 puts the two transducers quite close to each other and I am not sure if I can get the normal transducer to still sit slightly under the hull in "clean" water. Unless I find a bracket extension or something. Will be a tight fit to get both onto the same bracket and into "clean" water. But no holes in the hull.

Option 2 means I need drill into the hull below the water line, and still be below the existing transducer.

A couple of pictures are attached. Where you see a black line to LHS of the drain hole, that's where I was thinking the top of the LSS-2 bracket would sit - allows the transducer to sit in the "clean" water below the hull.

I am tending to Option 2 but appreciate any advice before I start to drill!

The other (left field) option was to mount in reverse and under the hull - there's a skeg directly in front of the engine that would lend itself to that - but would place this more than 30cm away from other transducer. And exposed more so than a transom mount. But maybe less interference from the engine...??

Kind regards,

Nomad65
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Last edited by Nomad65; 08-11-2013 at 11:28 PM. Reason: Adding another photo
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Old 08-16-2013, 05:09 AM
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Am hoping someone might have a view on this???

Cheers
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Old 08-16-2013, 06:53 AM
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Id be tempted to try option 1 first. There is a minimum distance between the transducers but I can't remember what it is. Mine are pretty close but work fine and you wouldn't be drilling through your hull.
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Old 08-16-2013, 10:21 AM
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Originally Posted by Aus Slipstream View Post
Id be tempted to try option 1 first. There is a minimum distance between the transducers but I can't remember what it is. Mine are pretty close but work fine and you wouldn't be drilling through your hull.
On the "minimum distance between transducers" - are you referring perhaps to the recommendation that the LSS & "traditional" xducer be within 12" for purposes of down-scan overlay on the traditional sonar display?

I am not aware of any minimum distance other than you don't want the regular transducer to be in the view of the LSS xducer, so often it is mounted a bit higher, as long as it will still maintain a wetted surface when running.
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Old 08-16-2013, 05:03 PM
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Originally Posted by mwardncsu View Post
On the "minimum distance between transducers" - are you referring perhaps to the recommendation that the LSS & "traditional" xducer be within 12" for purposes of down-scan overlay on the traditional sonar display?

I am not aware of any minimum distance other than you don't want the regular transducer to be in the view of the LSS xducer, so often it is mounted a bit higher, as long as it will still maintain a wetted surface when running.
I wasn't aware of it either but I did read it somewhere here on THT. I know that does not mean its gospel but someone quoted 2 or 3 inches as minimum between the traditional and the structure scan transducers. Mine are only 2.5 inches apart and work fine.
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Old 08-17-2013, 11:00 PM
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Thanks for the responses and input. I had another closer look at this yesterday and moving the existing transducer up and to the right (along the bracket) means that it would not be sitting near level with the hull (it would be about 20mm higher). So this wont work. And no point sticking the LSS-2 transducer into this position because then the existing transducer would then cause interference by being lower.

If the transducer bracket was moved or elongated to bottom left of current position, that would be perfect. As it is, the Option 2 location is looking the best of an average bunch.

I managed to connect up the electronics side of it all and delighted that the input from THT (and knowledge of the "yellow wire") meant it seems to be working fine. Will look to fit the transducer this coming weekend.

Last edited by Nomad65; 08-17-2013 at 11:00 PM. Reason: typo
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