How To Mount A Fishfinder On An Aluminum Boat

How to Mount a Fishfinder on an Aluminum Boat

Finding the perfect spot to mount your fishfinder on an aluminum boat can be tricky. Aluminum is a softer metal than fiberglass, requiring a slightly different approach to ensure a secure and lasting installation. This guide will walk you through the process, covering everything from choosing the right location to securing your device for optimal performance.

Choosing the Right Mounting Location

The key to a successful fishfinder installation is choosing the right spot. Consider these factors:

Optimal Transducer Placement:

• Minimizing Interference: The transducer needs a clear path to the water. Avoid areas with significant hull curvature or structural interference. A flat section of the hull is ideal.
• Depth Consideration: The deeper the transducer is submerged, the better the reading, especially at higher speeds. However, avoid mounting too low where the transducer could be damaged by debris.
• Accessibility: Choose a location that allows for easy access to the transducer for maintenance and cleaning.

Fishfinder Location:

• Clear View: Select a location where the fishfinder screen is easily visible from the helm. Avoid obstructions that might hinder your view.
• Protection from Elements: The fishfinder should be shielded from direct sunlight, rain, and spray. A well-protected location will extend its lifespan.
• Wiring Considerations: Plan the wiring route before you start drilling. You'll want to choose a location that allows for easy, safe, and concealed wiring.

Mounting Your Fishfinder: A Step-by-Step Guide

Once you've selected the ideal spots for both the transducer and the fishfinder head unit, follow these steps:

1. Preparing the Transducer Mounting Area:

• Clean the Surface: Thoroughly clean the area where you plan to mount the transducer using a degreaser and a clean cloth. This ensures a strong bond.
• Mark the Mounting Location: Use the transducer mounting template (provided with most units) to carefully mark the drilling locations. Double-check your markings to ensure accuracy.

2. Drilling the Mounting Holes:

• Use the Correct Drill Bit: Use a drill bit that is slightly smaller than the diameter of the mounting bolts or screws. This prevents cracking the aluminum.
• Drill Slowly and Carefully: Avoid applying excessive pressure, which could lead to damage to the aluminum hull.
• Deburr the Holes: After drilling, use a deburring tool to smooth the edges of the holes. This prevents the edges from cutting into the sealant or gasket.

3. Mounting the Transducer:

• Apply Sealant: A high-quality marine-grade sealant is crucial to prevent water intrusion. Apply a bead of sealant around the mounting holes before installing the transducer.
• Secure the Transducer: Carefully fasten the transducer to the hull according to the manufacturer's instructions. Make sure it's securely mounted and aligned correctly.

4. Mounting the Fishfinder Head Unit:

• Choose Your Mounting Method: Most fishfinders offer multiple mounting options (flush mount, surface mount, etc.). Select the method best suited for your boat and desired aesthetic.
• Prepare the Mounting Surface: Clean and prepare the surface where you'll mount the head unit, just as you did for the transducer.
• Secure the Head Unit: Carefully mount the head unit, ensuring it's level and securely fastened.

5. Wiring and Testing:

• Connect the Wires: Connect the transducer wire to the fishfinder head unit, making sure all connections are secure.
• Test the System: Once everything is connected, turn on the fishfinder and verify it's functioning correctly.

Tips for Success

• Use High-Quality Materials: Investing in high-quality marine-grade sealant and fasteners is crucial for a long-lasting installation.
• Consult Your Fishfinder's Manual: Always refer to the manufacturer's instructions for specific mounting guidelines.
• Consider Professional Installation: If you're unsure about any aspect of the installation, consider seeking help from a professional marine electronics installer.

By carefully following these steps and paying attention to detail, you can successfully mount your fishfinder on your aluminum boat, ensuring many years of reliable performance. Remember, a well-mounted fishfinder significantly enhances your fishing experience.