Installing A Fish Finder On Your Aluminum Boat: A Step-By-Step Guide

Fish finders are a great way to enhance your fishing experience. If you're looking to install a fish finder on your aluminium boat, there are a few things you should keep in mind. First, consider the type of fish finder you have and the mounting options available. Some fish finders come with a transom mount, which allows for easy installation without drilling holes in the hull. Alternatively, you can create a custom mounting bracket using plywood or aluminium and attach it to the boat using clamps or epoxy. When mounting the transducer, ensure it is pointed straight down and has sufficient clearance from the hull and propeller to avoid turbulence. Finally, route the transducer cabling neatly along the gunnel or transom, using cable management clips to avoid any damage. With careful planning and execution, you'll be able to enjoy the benefits of your fish finder on your aluminium boat in no time!

Mounting the transducer on an aluminium boat without drilling holes

If you're looking to install a fish finder on your aluminium boat without drilling holes, there are a few methods you can try. Here are some detailed instructions to help you get the job done:

Method 1: Using a Transducer Mounting Plate

Firstly, consider purchasing a transducer mounting plate. This option will require you to drill fewer holes, and it offers the flexibility to move or add different transducers in the future without drilling additional holes in your boat.

Method 2: Using Polyethylene or Polyvinyl Chloride (PVC) Board

Another approach is to use a polyethylene or PVC board as an alternative mounting surface. You can attach this board to your boat's transom using marine epoxy or adhesive, eliminating the need for drilling holes.

Method 3: Using a Flexible Arm or Silicone Adhesive (for kayaks)

If you're installing a fish finder on a kayak, you have a couple of additional options. One method is to use a flexible arm that dangles the transducer over the side of the kayak. Alternatively, you can use silicone adhesive to mount the transducer inside the kayak's hull, as the signal will pass through the plastic.

General Tips:

• When choosing a mounting location, ensure there are no obstructions under the helm that could be damaged when drilling.
• If you do need to drill holes, use a power drill at full speed to avoid splintering or chipping the gelcoat finish.
• Seal the mounting holes with silicone sealant to keep water out and protect your boat.
• Be mindful of the transducer's positioning, ensuring it's as close to the water as possible without touching it.
• Allow sufficient time for sealants and adhesives to dry completely before launching your boat.

Remember to refer to your fish finder's manufacturer instructions for specific recommendations and requirements. Good luck with your installation!

Using a mounting bracket to install a fish finder

Step 1: Prepare the Materials

• Fish finder unit with transducer
• Mounting bracket (made from plywood or aluminium)
• Epoxy or marine glue
• Screws and drill (optional)
• Cable management clips

Step 2: Mount the Fish Finder Display

• Create a mounting bracket that fits the fish finder display unit. You can make it from plywood or aluminium, ensuring it's sturdy and secure.
• Attach the mounting bracket to the boat using existing features like oarlocks or bolts. Alternatively, you can drill holes and screw the bracket into the boat.
• Mount the fish finder display unit onto the bracket, ensuring it's secure and won't move around.

Step 3: Install the Transducer

• Decide on a location for the transducer. It should be submerged when the boat is in the water.
• Use an existing bracket or create a new one from plywood or aluminium. Secure it to the transom using epoxy or marine glue.
• Mount the transducer onto the bracket, ensuring it's firmly attached.
• Run the transducer cable over the top of the transom and along the gunnel, using cable management clips to keep it in place.

Step 4: Finalise the Installation

• Check that all components are securely mounted and that the cables are safely routed.
• Test the fish finder to ensure it's functioning correctly.
• If needed, adjust the positioning of the display unit and transducer for optimal performance.

Running transducer cables into the boat

Running the transducer cables into the boat is a crucial step in installing a fish finder on an aluminium boat. Here is a detailed guide on how to do it:

Firstly, decide on the best location for the transducer. It should be pointed straight down and have at least half of the transducer below the hull. On V-hulls, this means one side will be at least half below the hull, and the other side may be completely below. Make sure it is mounted in green water when viewed from the transom. Aluminium boats with rivets create a lot of air bubbles, so ensure the transducer is not lined up with a row of rivets or a hull stake.

When it comes to running the cables, it is best to avoid putting screws in the outside of the transom for cable holders. Instead, use cable management clips to run the cables up and over the transom and then along the gunnel or the area where the cables would be most protected.

If you are reluctant to drill holes in the hull, an alternative method is to create a mounting bracket out of 3/4" plywood and attach it to the boat using one of the oarlocks. You can then mount the fish finder display head onto the bracket and run the cables from the transducer over the top of the transom.

Another option is to use a plastic cutting board and 3M 5200 marine adhesive. Rough up the paint on the boat and glue the cutting board to the boat before mounting the transducer. This method does not require any holes.

Choosing the best location for the fish finder

Choosing the best location for your fish finder is crucial for getting the most out of your device. Here are some factors to consider when selecting the ideal spot:

Visibility and Accessibility:

Place your fish finder in an area that is easily visible and accessible from your usual position on the boat. This will allow you to monitor the display without having to move around too much. Consider mounting it towards the front, near the seat or the trolling motor, so you can keep an eye on it while operating the boat.

Cable Management:

The transducer cable needs to be routed into the boat neatly and securely. You can use surface-mounted cable management clips to guide the cable over the transom and along the gunnel. Ensure you don't put screws on the outside of the transom for cable holders, as this may cause damage.

Mounting Options:

Decide whether you want a permanent or temporary installation. If you opt for a fixed position, you can mount the fish finder near the rear seat, providing easy visibility when running the motor. Alternatively, for more flexibility, consider a clamp-on mount on the gunwale, which allows you to adjust the location as needed.

Trolling Motor Usage:

If you plan to use a trolling motor, you may want to mount the fish finder's transducer on the trolling motor itself, providing more accurate readings. In this case, you can position the display screen either at the bow or towards the front of the deck, depending on your preference.

Safety and Convenience:

Ensure that the location you choose does not obstruct your movement within the boat or interfere with other equipment. It should be positioned in a safe spot, away from areas where it could be accidentally knocked or damaged.

Multiple Locations:

If you want to use the fish finder in different parts of the boat, consider getting a mount with adjustable arms. This will allow you to swivel the display towards the front or back, depending on where you are sitting.

Remember, there is no one-size-fits-all solution. The best location for your fish finder may depend on your boat's layout, your fishing style, and personal preferences. Experiment with different spots and don't be afraid to make adjustments until you find the perfect setup for your needs.

Using a fish finder mount

First, you'll need to create a mounting bracket. You can use a piece of plywood or a plastic cutting board for this. Cut the material to size, making sure it's big enough to fit the fish finder display head. If you're using plywood, you can attach it to the boat using one of the oarlocks, as shown in the example photos. If you're using a plastic cutting board, you can rough up the paint on the boat and glue the board to the hull using a marine adhesive like 3M 5200.

Next, you'll need to mount the fish finder display head onto the mounting bracket. This can be done using a variety of methods, such as epoxy or clamps.

Now, you'll need to decide how to mount the fish finder's transducer. One option is to use a transducer mounting plate, which will allow you to move or add different transducers in the future without drilling more holes. Another option is to use a piece of plywood or PVC board and attach it to the transom with marine epoxy. You can then mount the transducer onto this board. If you don't want to drill holes, you can use a C-clamp to attach the transducer to the board.

When it comes to the transducer's cord, you can either cut a hole in the transom for it to pass through or run it over the top of the transom, as shown in the example photos.

Finally, you'll need to route the transducer cabling into the boat. You can use surface-mounted cable management clips to run the cable up and over the transom and along the gunnel or another protected area.

And that's it! You've now installed a fish finder on your aluminium boat using a mount without drilling any holes in the hull.

Frequently asked questions