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Max Online: 36273 @ 01/23/13 02:34 PM
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#12715380 - 04/13/18 02:30 PM Transducer Help
JavelinJ Online   content
TFF Guru

Registered: 04/07/08
Posts: 10275
Loc: Jack County
So, I have a hummingbird 998C SI. Everything looks good at idle and what not. But, at speed, I lose bottom.

Does anyone know the protocol for correcting that?
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#12715413 - 04/13/18 02:57 PM Re: Transducer Help [Re: JavelinJ]
bassmanrudy Online   content
Pro Angler

Registered: 01/30/15
Posts: 875
Loc: Bossier City, LA
I know on my boat(Tracker PT 190) I lose SI at speed. I run Lowrance Gen 2 7s. Heck I lose 2D on speed as well. I have it mounted low on the aft but not on the little underscooped part. I have been told if I move it down there it would maintain bottom contact better.


Edited by bassmanrudy (04/13/18 02:59 PM)
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#12715414 - 04/13/18 02:58 PM Re: Transducer Help [Re: JavelinJ]
ETXfisher91 Offline
Outdoorsman

Registered: 02/07/17
Posts: 223
i got the helix 9 and i lose it all except maps when i get on plane

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#12715420 - 04/13/18 03:00 PM Re: Transducer Help [Re: JavelinJ]
Chris B Online   content
TFF Celebrity

Registered: 05/02/03
Posts: 8104
Loc: Prosper, TX
Where's your transducer mounted?
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#12715424 - 04/13/18 03:03 PM Re: Transducer Help [Re: JavelinJ]
Fishinfellow Online   content
TFF Team Angler

Registered: 01/12/10
Posts: 3236
Loc: North Richland Hills, TX
You have to have an in-hull ducer to keep an accurate bottom depth on pad.

Mounted to the Exterior, you won't read anything.
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#12715432 - 04/13/18 03:12 PM Re: Transducer Help [Re: JavelinJ]
Pintail711 Online   content
Extreme Angler

Registered: 08/11/15
Posts: 2495
Loc: Longview, Tx
Exactly what speed are you talking about?

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#12715442 - 04/13/18 03:16 PM Re: Transducer Help [Re: Fishinfellow]
JIM SR. Offline
TFF Celebrity

Registered: 09/25/06
Posts: 7588
Loc: NRH/Fork ! GET THE NET
Originally Posted By: Fishinfellow
You have to have an in-hull ducer to keep an accurate bottom depth on pad.

Mounted to the Exterior, you won't read anything.




Yes,..!! fish

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#12715475 - 04/13/18 03:33 PM Re: Transducer Help [Re: JavelinJ]
Jeff From Iowa Online   content
Outdoorsman

Registered: 01/07/18
Posts: 232
above 10 you need a high speed ducer... most call them thru hull as we glue them to the bottom inside


Edited by Jeff From Iowa (04/13/18 03:54 PM)
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#12715486 - 04/13/18 03:39 PM Re: Transducer Help [Re: Fishinfellow]
Chris B Online   content
TFF Celebrity

Registered: 05/02/03
Posts: 8104
Loc: Prosper, TX
Originally Posted By: Fishinfellow
You have to have an in-hull ducer to keep an accurate bottom depth on pad.

Mounted to the Exterior, you won't read anything.

Not true, I have my 2d transducer mounted externally and keep signal past 60mph.
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#12715563 - 04/13/18 04:29 PM Re: Transducer Help [Re: Chris B]
TCK73 Online   content
TFF Team Angler

Registered: 03/26/15
Posts: 3714
Loc: Jack County
Originally Posted By: Chris B
Originally Posted By: Fishinfellow
You have to have an in-hull ducer to keep an accurate bottom depth on pad.

Mounted to the Exterior, you won't read anything.

Not true, I have my 2d transducer mounted externally and keep signal past 60mph.


Yep, mine is the same way, no loss of bottom.

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#12715606 - 04/13/18 05:00 PM Re: Transducer Help [Re: JavelinJ]
JavelinJ Online   content
TFF Guru

Registered: 04/07/08
Posts: 10275
Loc: Jack County
FYI - I never lost bottom on the other boat. So I know I have something not set up right. Just not sure exactly what yet.
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#12715633 - 04/13/18 05:18 PM Re: Transducer Help [Re: JavelinJ]
JavelinJ Online   content
TFF Guru

Registered: 04/07/08
Posts: 10275
Loc: Jack County
Maybe it is too high?
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#12715638 - 04/13/18 05:23 PM Re: Transducer Help [Re: JavelinJ]
K.D. Online   content
TFF Guru

Registered: 05/04/02
Posts: 14363
Loc: Hurst, TX



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#12715640 - 04/13/18 05:25 PM Re: Transducer Help [Re: JavelinJ]
squib Offline
Extreme Angler

Registered: 01/03/03
Posts: 1298
Loc: Lubbock, TX
That part of your boat isn’t in the water over about 20 mph. It needs to be shoot thru. Either that or lower it to bottom of the step next to drain hole. But you’ll likely knock it off down there. Glue it in the bilge. As low and center as you can get it. Right in front of the drain in best. I can read mine at 65 mph.

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#12715650 - 04/13/18 05:30 PM Re: Transducer Help [Re: K.D.]
JavelinJ Online   content
TFF Guru

Registered: 04/07/08
Posts: 10275
Loc: Jack County
Originally Posted By: K.D.




That's what i figured.
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