The instructions below detail how I created my transducer mount to attach my Humminbird side imaging transducer to my Wilderness Systems Commander 120. After exploring multiple options for mounting the transducer, I couldn't find a solution that met my needs so I sought inspiration from other implementations and came up with my own. I wanted my mount to:
- Be Completely Removable
- Create Minimal Drag
- Be Protected From Objects in the Water
- Have A Clear Line of Sight on Both Sides
The transducer I came up with uses the existing threaded holes for the rudder on Wilderness Systems kayaks. It is quickly assembled and easy to remove.
- 1/4-20 x 2" Carriage/Step Bolt (Qty. 1)
- 1" Ram Double Socket Arm (Get 2 for $16 at YakAttack)
- 1" YakAttack Screwball (Qty. 2) Get It
- 3/4" Deep PVC Coupler
- 3/4" PVC Plugs
- PVC Glue
- 12" 1/4-20 Threaded Rod
- 1/4" Lock Nut
Using a Dremel or hacksaw, cut off the 1/4-20 x 2" carriage/step bolt to roughly 1 5/8" and hand screw it into one of the YakAttack Screwballs (set aside). To ensure the correct length, you can screw it into the rudder hole on the back of your kayak, and mark where to cut off the excess.
Glue the 3/4" PVC Plugs into the 3/4" Deep PVC Coupler. This creates what would appear to be a closed capsule.
Use a 1/4" bit to drill a hole in the center of each cap. An easy way to start your hole in the center is to place the other Screwball on the center of the cap, and tap a nail in the center of the Screwball to mark your starting point.
Using a dremel or hacksaw, cut the 1/4" threaded rod to roughly 5 1/4". Begin threading the rod into the existing center hole of the plastic bracket that comes with the Humminbird transducer.
You may need use a smaller drill bit to widen the hole to allow the rod to thread easier. Use a pair of channel locks with a thick rag over the jaws to turn the rod without ruining the threading. Place the 1/4" locknut snuggly on the bottom of the rod.
Place the PVC capsule you created onto the threaded bar.
Place the 2nd Screwball on top of the threaded bar and tighten.
Remove the existing screws included with your Wilderness Systems kayak for the rudder.
Screw the Screwball created into Step 1 firmly into the top hole.
Attach the Ram arm to the screwball pointing down.
Attach the assembled transducer. I chose to paint mine black using a flat spray paint.