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Jan 23rd, 2013
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Humminbird 998 SI snow #13225007 07/25/19 05:00 AM
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Greg W Online Content OP
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Getting this interference on my 998 SI on the DI and one side of SI. It's installed at the console of my center console with a spring loaded protection plate. It was installed by Shutup and Fish. I have added a swim platform above the transducer, but seems odd that would change anything below it. DI contrast is turned up to 10 just to show it better, but even with lower contrast still shows. I mean you can see the bottom so it doesn't mess with fishing that much, but still. You think it's the transducer or graph?

[Linked Image]
[Linked Image]

Re: Humminbird 998 SI snow [Re: Greg W] #13225020 07/25/19 07:15 AM
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scruboak Offline
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Think its the platform added after install

Re: Humminbird 998 SI snow [Re: Greg W] #13225021 07/25/19 07:22 AM
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scruboak Offline
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Maybe mounted on left side

Re: Humminbird 998 SI snow [Re: Greg W] #13225027 07/25/19 10:39 AM
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44 Diesel Online Content
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It's gonna be the swim ladder. The 998 has blended di meaning the di views is created by the si beams overlapping below the transducer to create a computer generated di. If anything obstructs the si beams it will also show up on the di views as well

Last edited by 44 Diesel; 07/25/19 10:40 AM.
Re: Humminbird 998 SI snow [Re: Greg W] #13225264 07/25/19 03:06 PM
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Greg W Online Content OP
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yea, but the platform is above the transducer. So why would that be an issue? I can get it moved if needed just don't want to unless I have to.

and thanks everyone for the replies

Re: Humminbird 998 SI snow [Re: Greg W] #13225769 07/26/19 12:59 AM
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Wayne P. Offline
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Originally Posted by Greg W
yea, but the platform is above the transducer. So why would that be an issue? I can get it moved if needed just don't want to unless I have to.

and thanks everyone for the replies



Humminbird's SI "sees" from the water's surface to past vertical under the transducer on both sides. That is why a hole shot plate or some cover is needed for a SI transducer on a jackplate.

Even with Skeeters and the extended mounting with a Transducer Shield and Saver mount to get below the hull sponsons, it still "sees" inside the jackplate.


Humminbird Helix 12 CHIRP SI, Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2,
Helix 7 CHIRP MEGA SI GPS G3, Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, 360, RC-1
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