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Need help fast!!!!!!

Old 05-30-2016, 04:27 PM
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Default Need help fast!!!!!!

I just bought the garmin 7610xsv from Gil which he bent over backwards to get it to me thanks Gil your the best.

Ok here's the problem I just got it installed and I installed a gt51 transom mount transducer with it. When the boat plans off the unit doesn't loose bottom but the bottom gets really sketchy no matter what's the speed on plain. I bought this unit to find new fishing spots on bottom while running. To me installed exactly how garmin said to install the transducer. Center of the bottom of the transducer is level with the bottom of the hull. What would make the bottom look so sketchy? Please help snapper season is less then 30hrs away guys and it's going to kill me not to be able to use my new $3200 fish finder.
Old 05-30-2016, 04:33 PM
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Can you please post pictures, What is forward of the transducer on the bottom of the boat?
Old 05-30-2016, 04:41 PM
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It sounds like it's working normally. When you are going less than 10kts, is the drawing more consistent?
Old 05-30-2016, 05:00 PM
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The site will not let me upload right now for some reason. Saying something about security token. But I'm trying
Old 05-30-2016, 05:03 PM
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Can you email me the pics?
Old 05-30-2016, 05:09 PM
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i sent you the email

Last edited by kingfish122; 05-30-2016 at 05:15 PM. Reason: Wrong message
Old 05-30-2016, 05:16 PM
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That's what mine looks like at 30kts too.
Old 05-30-2016, 05:20 PM
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Here are your pics:

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Old 05-30-2016, 05:25 PM
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So these just suck and Tay on bottom?? My cheap 500w base model transducer kept bottom just fine.
Old 05-30-2016, 05:41 PM
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Unless it's an optical illusion, it doesn't look level with the ground?
Old 05-30-2016, 06:20 PM
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try lowering it by 1/4" and tilting the trailing edge down a tiny bit.

to me it looks like you're getting air bubbles running across the face of the 'ducer.



is that an anode next to it? on a fibreglass hull?
Old 05-30-2016, 06:26 PM
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The transducer is tilted it need to be straight.
Old 05-30-2016, 07:21 PM
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Ok will find some level ground first thing in the morning. Thanks will be doing some crazy freaking out till I get this working right
Old 05-30-2016, 09:39 PM
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yeah that things leaning a mile
Old 05-31-2016, 05:21 AM
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Try using a level app on your phone. Level the transducer to the Anti-cavitation plate on your motor.
Old 05-31-2016, 06:22 AM
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Originally Posted by kingfish122 View Post
I just bought the garmin 7610xsv from Gil which he bent over backwards to get it to me thanks Gil your the best.

Ok here's the problem I just got it installed and I installed a gt51 transom mount transducer with it. When the boat plans off the unit doesn't loose bottom but the bottom gets really sketchy no matter what's the speed on plain. I bought this unit to find new fishing spots on bottom while running. To me installed exactly how garmin said to install the transducer. Center of the bottom of the transducer is level with the bottom of the hull. What would make the bottom look so sketchy? Please help snapper season is less then 30hrs away guys and it's going to kill me not to be able to use my new $3200 fish finder.

I'm not trying to be negative or rain on your parade, but you may never get your 7610 to read bottom good a speed. See my thread that I started over 1 year ago with the same problems you are having. http://www.thehulltruth.com/marine-e...ics-added.html


I have tried moving the GT51 several times with no luck. We are not the only ones having this problem! I have three transducers on my boat and ALL 3 loose bottom at speed. The original factory glassed in B744 worked great with my old 3210 garmin and held bottom at 37mph like a champ! But it does not hold bottom at all with my new 7610xsv units (nor does my B175M or the GT51). I could go on and on about this issue, but at this point I don't know what else to do. I unfortunately just realize that I'm not going good returns at speed, sucks!
Old 05-31-2016, 06:39 AM
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This is the typical situation with transom mount transducers when going fast. It is the rare exception to the rule to get good readings at speed.

You need to look at the hull in front of the transducer to see if you have any rough spots or thru hull fittings or anythng else that can cause turbulence or bubbles to pass over the transducer at speed. Many hulls just cause bubbles or turbulence no matter what you do.

However, most tm mount transducers just dont work well at speed.

Thats why they make thru-hull transducers
Old 05-31-2016, 08:35 AM
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I recently installed the same unit and xducer on my boat and the sonar image is certainly not broken up that badly at 31mph. By 40+ it starts looking kinda similar.

You should have put in a Stern Saver block to keep from having to drill more holes in your hull when you level the xducer, as it is not shooting straight down as it is shown in the pics.
Old 05-31-2016, 01:19 PM
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At any speed that ducer will work better parallel to the ground / Ocean floor. The transducer beam should shoot straight down not off to the side.

Due to running attitude of the hull sometimes the fore and aft angle needs to be slightly adjusted for max performance. If you trim the motor up and down while underway essentially raising and lowering the bow and running angle, you can check if it improves the sounder image and you can adjust the ducer accordingly.
Old 06-01-2016, 06:16 AM
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I would mount it right next to the drain hole. Mine is not perfect at 30 knots but it is way better than what you are showing. As others have said, level the mount but if you want the cleanest water you have to mount it as low as you can. I have a 264n flush mount, tilted element that reads perfect at any speed on my 7610xsv so it isn't the unit.... just transom mount ducers in general.

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