Fixing a Fishfinder Transducer
I know I keep veering away from trout fishing and promise to get back to it soon – but this may be important to a fisherman somewhere. I have an older model Humminbird fishfinder, a Wide Eye, from the eighties. The wires to the transducer were sheared (or pulled off) right at the transducer puck. I did some research online and found a replacement for $77.16 at Amazon, but, based on an email to Humminbird Service, I couldn’t be sure the replacement transducer works with my older model. (Service said my unit is so old there are no replacement parts and I should buy a new fishfinder – uuhhh… thanks for the advice?)
I trolled the web to see if there was a way to fix it. The word on the web is: buy a new one because you can’t repair them. I could see their point, in my case the wires I needed to reconnect are encased in the plastic compound of the puck, sort of like Hans Solo encased in Carbonite, but less to work with.
I decided to do surgery on the puck. (What did I have to lose?) The main issue was getting to the wires inside. I took a 1/8th inch drill bit and made small holes all the way around the spot where the wires exit. I drilled just deep enough to break though the molded plastic seal. Then I chipped away the plastic until I could see the two wires, one black and one red (matching the wires encased in the cable). The wires are tiny – so extreme care has to be taken to work them free of the plastic seal. Once they were free I was able to strip the coating off the two wires using an exacto knife and a lot of patience.
Then I did the same thing with the cable end – stripped and exposed enough of the wires so I could hold and solder them to the wires in the puck. I used a pencil type soldering iron with a fine point. Once the wires were soldered I filled in the hole and soldered joints with two part epoxy. I gobbed on enough so that it covers the cable where it exits the puck. Hopefully it’s as strong as carbonite so the wires don’t pull out again.
The Test: I took the boat out on a local lake and it seems to be working better than ever. It zeroed right in on the bottom. If you are on a budget – don’t trash the transducer. Dig out and solder together the broken off wires and gob up the hole and wires with epoxy. Save yourself eighty plus dollars with very little effort.
Fichigan 