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#10933211 - 06/22/15 02:18 PM Hummingbird 998 question
Ty's Team Offline
Outdoorsman

Registered: 10/14/08
Posts: 243
I have two fishfinders. The one in the front has no issues but the one in the back will not read 2D. My guess is because the depth is always wrong. I'll be in let's say about 11 feet of water and it will read 120ft deep or sometimes I'll be in like 20 feet of water and it marks the boat being in 3ft. I've checked the transducer and there doesn't appear to be anything wrong with it. Also, the my downscan, sidescan work perfectly. What can be the issue?

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#10934494 - 06/23/15 08:24 AM Re: Hummingbird 998 question [Re: Ty's Team]
Tommie Online   content
Pro Angler

Registered: 12/18/10
Posts: 899
Loc: Longview, Tx
Have you tried restoring factory defaults to see if that corrects the problem?
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#10934720 - 06/23/15 09:55 AM Re: Hummingbird 998 question [Re: Tommie]
Ty's Team Offline
Outdoorsman

Registered: 10/14/08
Posts: 243
yes. Still doesn't work properly.

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#10934878 - 06/23/15 10:52 AM Re: Hummingbird 998 question [Re: Ty's Team]
Wayne P. Online   content
TFF Team Angler

Registered: 11/16/10
Posts: 3429
Loc: Charlottesville, Va
Did you do the install?

Are you using a shoot-thru and Y cable along with the SI transducer?
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Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1

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#10935496 - 06/23/15 02:13 PM Re: Hummingbird 998 question [Re: Wayne P.]
Ty's Team Offline
Outdoorsman

Registered: 10/14/08
Posts: 243
No, I did not do the install. It worked originally when it was first installed. So I'm pretty sure it was installed correctly.

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#10935618 - 06/23/15 03:00 PM Re: Hummingbird 998 question [Re: Ty's Team]
Tommie Online   content
Pro Angler

Registered: 12/18/10
Posts: 899
Loc: Longview, Tx
Quick question....is your 2D only not reading correctly when you are moving around with your big motor?
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#10937041 - 06/24/15 09:17 AM Re: Hummingbird 998 question [Re: Tommie]
Ty's Team Offline
Outdoorsman

Registered: 10/14/08
Posts: 243
It doesn't matter if I'm moving or not. It won't read. Every once in a while it will start working for like 10 seconds and then hours of it not working.

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#10937078 - 06/24/15 09:33 AM Re: Hummingbird 998 question [Re: Ty's Team]
SkeeterDon Offline
TFF Team Angler

Registered: 05/18/05
Posts: 4086
Loc: Pflugerville, TX
You could easily have a pinched/severed wire somewhere. Find someone else that has a 998 or with the same connections and test the unit on their boat. If all works then you know its the transducer.
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#10937208 - 06/24/15 10:41 AM Re: Hummingbird 998 question [Re: SkeeterDon]
Ty's Team Offline
Outdoorsman

Registered: 10/14/08
Posts: 243
Thanks, I'll try that.

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#10938009 - 06/24/15 04:28 PM Re: Hummingbird 998 question [Re: Ty's Team]
elkfish Offline
Outdoorsman

Registered: 07/18/11
Posts: 249
Loc: Amarillo, Tx
Ty,
my units does the exact same thing. the unit is used but the transducer is new out of the box. I have traced the cable from the unit to end of the ducer and there is not any cuts or bends in the cable. the imaging parts works great (SI and DI) but the 2D and depth does not...I was about to post the same question on this page but saw your post so I was hoping for an answer. I have restored factory defaults and all updates.
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#10938533 - 06/24/15 09:19 PM Re: Hummingbird 998 question [Re: Ty's Team]
44 Diesel Online   content
TFF Team Angler

Registered: 12/25/12
Posts: 3398
Loc: Burleson,TX
Had a similar issue. If your unit is in auto depth try changing it to manual depth and set it a little deeper than your actual depth. That seemed to solve my issue

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#10938920 - 06/25/15 07:03 AM Re: Hummingbird 998 question [Re: Ty's Team]
donothin Offline
Pro Angler

Registered: 05/16/08
Posts: 665
Loc: Belton Lake, Moffat
Mine does the same thing. I assumed the second transducer was installed in a bad location. Disconnected it and just use the primary transducer and it works fine at slow speed. Your post makes me think something else is wrong.

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#10943498 - 06/27/15 11:50 AM Re: Hummingbird 998 question [Re: Ty's Team]
hopalong Online   content
Super Freak

Registered: 09/06/08
Posts: 74316
Loc: manager, drake river ranch (fo...
I have been fighting the same issue on an 899 on the bow, got a 998 at the console.
mine shows 2 or sometimes 3 readings on the 2 d but side/down work fine.

on the 3rd ducer from humminbird and gonna got test it on fork tue.
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