How to Build a 3D-Printed Kayak Fish Finder Mount: DIY Step-by-Step Guide
Introduction
In this guide, one will learn how to design, 3D‑print, and securely install a custom fish finder mount for a kayak. The process combines digital modelling, additive manufacturing, and practical marine hardware, resulting in a lightweight yet robust solution. By following each step, the reader gains confidence in using CAD software, selecting appropriate mounting accessories, and achieving a professional finish without excessive cost. The final mount will hold a variety of fish finders securely, even in choppy water, while preserving the kayak's aesthetic and balance.
What You'll Need
- Desktop or resin 3D printer capable of 0.2 mm layer height.
- Filament or resin suitable for marine environments (PETG, ASA, or UV‑resistant resin).
- Basic CAD software (Fusion 360, Tinkercad, or FreeCAD).
- Measuring tools: digital caliper, ruler, and marker.
- Drill with 1/8" and 3/16" bits for pilot holes.
- Marine‑grade mounting hardware – the VAZESWIN Ball Fish Finder Mount (price $49.99, rating 4.6/5, 247 reviews).
- Alternative budget option – the Scotty Ball-Mount Fish Finder Plate (price $36.85, rating 4.6/5, 1,192 reviews).
- Optional low‑cost mount – the Vadaxx 360° Fish Finder Mount (price $15.99, rating 4.3/5, 636 reviews).
- Silicone sealant, marine‑grade screws, and zip ties.
- Safety equipment: gloves, goggles, and a well‑ventilated workspace.
Step-by-Step Instructions
1. Measure the Installation Area
Begin by selecting a flat section on the kayak deck where the fish finder will be most visible. Use a digital caliper to record the width, depth, and any curvature of the surface. Typical kayaks provide a 4‑6 inch wide strip near the cockpit. Mark the centre point with a waterproof marker. Accurate measurements are essential because the 3D‑printed bracket must align with the ball mount's 1.5" C‑size ball and the mounting plate's pre‑drilled holes. This step prevents misalignment that could cause stress on the electronics during motion.
2. Design the Bracket in CAD
Open your preferred CAD program and create a new project named "Kayak_FishFinder_Mount". Model a base that matches the dimensions of the chosen ball mount. For the VAZESWIN option, the base should include a 2.4" diameter circular recess to accept the 1.5" TPU ball, and a rectangular plate area of 6.25" × 2" for the mounting holes. Add a 9.1" long arm if you desire the same reach as the VAZESWIN long arm; otherwise, a 5.9" arm similar to the Leenconghui design reduces weight. Incorporate ventilation slots to prevent water retention. Export the model as an STL file.
3. Prepare the 3D Printer Settings
Select a filament that resists UV degradation and moisture absorption; PETG is a balanced choice. Set the nozzle temperature to 240 °C and the heated bed to 80 °C. Use a 0.4 mm nozzle and a layer height of 0.2 mm for a strong surface finish. Enable 100% infill with a rectilinear pattern to maximize rigidity, especially in the arm section. Apply a brim to improve bed adhesion, as the base will be relatively flat and may warp otherwise.
4. Print the Bracket
Load the STL file and start the print. Monitor the first few layers to ensure proper adhesion. Once completed, allow the part to cool for at least 30 minutes before removal. Inspect the printed surfaces for layer gaps; sand any rough edges with 220‑grit sandpaper to avoid scratching the kayak deck. The printed bracket should weigh less than 300 g, which is ideal for a kayak that prioritizes lightness.
5. Install the Ball Mount
Attach the VAZESWIN Ball Fish Finder Mount to the printed base. This mount offers a sturdy 6061‑T6 aluminum alloy construction, a 9.1" double‑socket arm, and universal pre‑drilled holes compatible with most Garmin and Lowrance devices. Secure the ball into the recessed cavity of the printed base, ensuring the ball clicks into place. Tighten the set screws provided with the VAZESWIN kit (note that the kit does not include installation screws; use marine‑grade stainless steel screws of appropriate length). The ball's 360° rotation allows precise angling of the fish finder during use.
6. Mount the Fish Finder
Place your fish finder onto the rectangular plate of the VAZESWIN mount. Align the device's bolt pattern with the pre‑drilled holes on the plate. Use the supplied bolts (or the included hardware from the VAZESWIN package) to secure the unit. For smaller devices, the Scotty Ball-Mount Fish Finder Plate can serve as an intermediary plate; its larger ball provides additional clamping force for heavier units. Verify that the fish finder sits flush and does not obstruct the kayak's cockpit or paddle slots.
7. Seal and Test the Assembly
Apply a thin bead of marine‑grade silicone sealant around the base where it contacts the kayak deck. This prevents water ingress and reduces vibration. Allow the sealant to cure for 24 hours before launching. Once cured, test the mount by rotating the ball through its full range, confirming that the fish finder remains stable at each angle. Conduct a short on‑water trial in calm conditions, checking for any movement or loosening of screws. Adjust the ball's tension if necessary by tightening the set screw on the VAZESWIN mount.
Tips & Pro Tips
- Print the bracket with a small amount of carbon fiber reinforcement filament for added stiffness without a significant weight penalty.
- If the kayak deck is curved, incorporate a slight angle in the CAD model to match the hull's contour.
- Use stainless steel self‑tapping screws to avoid corrosion in saltwater environments.
- For extra security, add zip ties around the arm and the kayak's existing deck fittings.
- Consider painting the printed bracket with a UV‑resistant marine coating to extend its lifespan.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mount wobbles after a few trips | Loose set screw on ball or insufficient infill | Tighten the set screw, re‑print with 100% infill, or add a metal reinforcement plate. |
| Fish finder does not align with view window | Improper arm length or angle | Adjust arm length in CAD, re‑print, or use the 9.1" long arm from the VAZESWIN kit for greater reach. |
| Water leaks into the mounting area | Missing sealant or damaged silicone | Reapply marine silicone, ensure a clean surface before sealing. |
Conclusion
By following this guide, one has created a durable, lightweight, and fully adjustable fish finder mount tailored to a kayak's unique geometry. The combination of a 3D‑printed bracket and a high‑quality ball mount such as the VAZESWIN or Scotty options ensures reliable performance in both fresh and saltwater conditions. The process also demonstrates how additive manufacturing can solve niche marine challenges, empowering anglers to customize their equipment while keeping costs low. One is now ready to explore new waters with confidence, knowing the fish finder is securely positioned and easily adjustable.
Products Mentioned in This Guide
Frequently Asked Questions
What type of 3D printing material is best for a kayak fish finder mount?
Use marine‑grade PETG, ASA, or UV‑resistant resin because they resist water, UV exposure, and impact while remaining lightweight.
Do I need a high‑resolution printer for this project?
A printer capable of 0.2 mm layer height is sufficient; finer resolution offers marginal benefit but isn’t required.
Can I design the mount with free CAD software?
Yes, programs like Fusion 360, Tinkercad, or FreeCAD provide all the tools needed to model a custom mount.
What hardware is required to secure the printed mount to the kayak?
Use marine‑grade bolts and screws (typically 1/8" and 3/16") with stainless‑steel washers and a VAZESWIN ball fish finder bracket for a sturdy connection.
How do I ensure the mount stays balanced and doesn’t affect kayak handling?
Position the mount near the kayak’s centerline, keep the printed part lightweight, and verify that the fish finder’s weight is evenly distributed before final installation.