Lowrance 3/1 transducer mount on the BigRigHDFD

Well let me start by saying thank you to Jackson Kayak for making the transducer scupper plug area big enough for the Lowrance 3/1 active imaging transducer. The Lowrance active imaging transducer is 11” long so it’s massive and takes up a lot of real estate.

I am going to walk you through how My wife and I mounted it and the parts I used. This isn’t the only way but to me it’s the most streamline way to do it.

The parts we used are:
1. Lowrance scupper transducer Mount. (We used peices)
2. Lowrance totalscan replacement bracket. (We used only the long upper peice)
3. The listed parts from Lowe’s:

2- 1 in galvanized corner brackets
1- #10-24 x 1ft All Thread
2- 5/32×3/8×1/16 Rubber washer
2- 1/2x.257×1/4 Nylon Spacer
1- #10-24x2in Stainless machine bolt
1- #10-24 Stainless Wing nut
2- #10-24 Stainless Locking Nut

You will need bolt cutters, channel locks, screw driver and a socket set and hot knife or just use longer corner brackets at least 1.5-2”.

We started by mocking up the transducer to make sure it would fit and give us the clearance needed. We took the Lowrance scupper plug mount and replaced the plastic rod with the 1ft all thread metal rod. (You will have to cut this, hence bolt cutters). We had to take the hot knife to remove the top of the totalscan replacement bracket to get it to seat right. We then connected the corner brackets to the all thread and ran the bolt, washers, and nylon spacers through to attach the transducer to the all thread. Note: we then took the all thread and made sure it was to the top of the bracket to prevent it from moving to keep it level. Once everything was connected we ran the components from the bottom to the top of the scupper plug. We then attached the rubber gasket, foam insert, scupper plug plastic bracket and the wing nut. My wife held the transducer to the bottom of the kayak so I could fasten the wing nut to the top to secure it and make sure it’s flush. After I had it where I wanted it I used the bolt cutters to trim the all thread to where the cap would fit over it. Once we did all of that we just ran the wires and she was secured! It wasn’t as hard as I thought it would be but it wasn’t as easy either. The project took roughly 1 hour to complete.

We did run the wires inside the hull so we did have to drill holes in the boat. For the Lowrance units this will require a 1” hole to get the cords through it. This is best covered by the Hobie thru hull plugs to keep water out.

Please feel free to reach out if you have any questions or concerns.

– Dave Newman