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Corroded garmin fishfinder leads

Old 11-17-2016, 08:47 PM
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Default Corroded garmin fishfinder leads

Hi guys,

The female end power and data leads for my fishfinder have corroded to the point where they aren't working anymore. How are these generally replaced? Can you just replace the head or do you do the whole cable?

Thanks in advance
Old 11-17-2016, 09:40 PM
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You CAN replace just the connector, but it may be more work than just replacing the cable. If you dyke off the connector and replace it, you have to strip and splice each wire, shrink wrap the wire, then shrink wrap the package. You really need to do a Western-Union splice, as the crimp-style splices will cause a discontinuity that may adversely affect the instruments' performance. You have the solder option, but that is not recommended per ABYC code.

Unless you have a very technical route, you're probably better served to tie a line to the old cable, pull it through, then use the line to get the new cable through. A good tape-job on the line/cable interface & some lubricating jelly will make the pull much easier.

Also, are you sure you can't salvage the existing connector? You may be able to get away with a soda or vinegar bath & light scrub to get rid of the corrosion. If I can offer a recommendation: Whether you clean the old connector or install a new connector/cable, use some dielectric gel when you re-connect. It will help mitigate against further corrosion.
Old 11-17-2016, 10:35 PM
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Lemon juice works great also... Then as said some dielectric grease after they are cleaned up...
Old 11-18-2016, 06:08 AM
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Do you have a pic of connector? Do you remove the fishfinder when not in use? Replace the whole wire. Cheaper hummingbirds have two wires. One is simply power and costs $18. The other goes to the transducer and cost much more because a new transducer is attached. If you have to replace that one its cheaper to buy a new fishfinder if its one of the $100 units.
Old 11-18-2016, 09:27 AM
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Dielectric grease and/or CorrosionX is a good idea and will help this problem in the future.

Another thing many people dont do is turn OFF the power to the plug/connector. Leaving power to the plug when disconnected can cause galvanic corrosion. Especially in salty conditions.
Old 11-18-2016, 12:10 PM
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I routinely spray CRC 656 on my electrical connections, been doing that for a long time and works just fine.

Old 06-14-2020, 06:39 PM
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I have the same problem with my echomap chirp 93sv. the cables are slightly corroded. i put a new bail mount on the garmin was giving me problems today. would the methods stated above work on the cables?

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