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Old 10-02-2021, 06:51 PM
Timmer92 Timmer92 is online now
Join Date: Dec 2011
Location: MN - Twin Cities, North Metro
Posts: 262
Default Sonar storage in winter?

Hey there,

I live up here in cold Minnesota and have always left my sonar units in my boat in my unheated shed without issue. However, I just had a relative who's sonar screen had visible internal damage this spring when he took it out of storage. This started a debate among relatives on whether you are supposed to bring them in over winter. I have a new boat with 3 screens and I sure would hate to damage them. However, I have never heard of needing to bring them in out of the cold. What are your thoughts?

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Old 10-02-2021, 09:27 PM
h8go4s h8go4s is offline
Join Date: Apr 2011
Location: Victoria, MN
Posts: 1,532

Several pages of posts on the issue here:


Read your owner's manual.
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Old 10-02-2021, 10:28 PM
GBS GBS is offline
Join Date: May 2005
Location: White Bear Lake, Minnesota, USA.
Posts: 2,104

Usually the info is found in the manuals. For Lowrance, they aren't supposed to be stored below 4F.
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Old 10-03-2021, 05:22 AM
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last chance last chance is offline
Join Date: Mar 2013
Location: muncie indiana
Posts: 2,559

I have left mine in the pole barn for yrs without issue. I just started bringing mine in for some reason and I can't explain why. but maybe I'm the exception but we had temp reach well below 0 many times mine was in the barn with no ill effects. but with the money spent on them, why take chances.
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Old 10-03-2021, 06:02 AM
seaotter seaotter is offline
Join Date: Jul 2002
Location: Warsaw, IN, USA.
Posts: 844

Mine are always stored inside over the winter. I read that they should not be stored in sub zero temps in a Lowrance manual man years ago so I have always stored all electronics in the basement over the winter. The only things left in the boat are T Motor, Engines, and Batteries. I plug onboard charging system in once a month for a day or 2.
Have a great day.
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Old 10-03-2021, 03:42 PM
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Ltrain Ltrain is online now
Join Date: Dec 2015
Location: Northwest Indiana
Posts: 3,171

Yeah, I bring mine in too.
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Old 10-03-2021, 10:32 PM
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San Chan San Chan is offline
Join Date: Nov 2006
Location: Canada
Posts: 2,364

Regardless what others been doing or what the manual stated, to me, all it take it’s just once and I have to cough out couple of thousands for another one….why gamble? It’s under my bed all winter.
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Old 10-04-2021, 12:15 PM
REW REW is offline
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Join Date: Nov 1999
Location: .
Posts: 39,140

Simply put:

There are 0 reasons not to take the sonars indoor for warm off season storage - so do it.

It makes 0 sense to leave the sonars on the boat when the boat is in storage.

Best wishes
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Old 10-04-2021, 03:34 PM
brad34 brad34 is online now
Join Date: May 2015
Location: Twin Cities, MN
Posts: 776

As REW pretty much said, I don't understand why anyone would leave them out all winter. They are so easy to bring in.
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Old 10-05-2021, 07:04 AM
kswalleyer kswalleyer is offline
Join Date: Jul 2017
Location: Kansas City
Posts: 1,071

never brought them in.....ice fishing doesn't kill them all winter...
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