How To Mount A Transducer On An Aluminium Boat

So you’ve dusted off the old fishing rods, launched your boat, and cast a couple of dozen lines only to find yourself coming home empty-handed. While fishing requires patience, anglers use many tools to help them identify ideal fishing spots. And one of the most effective tools available is a transducer.

So, if you are experiencing trouble finding good fishing spots lately, then this article might just give you the perfect solution.

Mounting A Transducer: An Overview

Most anglers prefer to use aluminum boats for fishing due to two primary reasons. First, aluminum boats are incredibly durable, and second, they are very cost-effective. But what happens when you have picked the right boat and invested in the best rods but still come up short. Luckily, technological innovation over the years has given us some great tools to improve our chances of a successful catch. And one reliable tool is a transducer.

A transducer is an electronic sensing device that converts electrical energy into high-frequency sound with the help of a transmitter. Transducers produce sound waves that travel through the water, which will bounce back and return the signal. The transducer will then convert these waves into readable frequencies that can be viewed as terrain and fish in the area. It helps monitor the type of terrain you are fishing in, including any movement occurring under the water.

If you have an aluminum boat and feel like a transducer is just the tool you were looking for, this article will guide you through the steps of mounting one as follows:

  • Step One: Gathering the Right Equipment
  • Step Two: Placement
  • Step Three: Drilling, Coating, and Mounting
  • Step Four: Connecting the Transducer Wires

Step One: Gathering The Right Equipment

Begin by sourcing the required equipment, including the transducer itself. Most modern models can transmit through aluminum without any issues. However, it wouldn’t hurt to double-check before you purchase. Once that is out of the way, it is time to gather the equipment needed for installation. You will need a mounting plate, drill, sandpaper, stainless steel nuts and bolts, sealant, and zip ties.

Step Two: Placement

According to tried and proven recommendations by most boaters, choosing the right place to mount your transducer will critically affect how it works, along with the solidarity of your hull. The ideal place for mounting a transducer is on the transom of your boat. Water reaching the transducer’s face is an absolute must to produce an accurate reading. So the transom is the perfect place since it is the farthest away from turbulence during a sail.

Step Three: Drilling, Coating, And Mounting

You want to begin this step by drilling holes in your transom to fix the mounting plate. Before you start, count the number of holes in the specific mounting plate you have purchased and replicate it onto the boat. Make sure to perfectly align the holes you drill with the holes on the mounting plate. Use a drill bit that fits perfectly through the holes in the mounting plate. Drilling too large a hole will result in leakages.

Your next task would be to prevent the holes you just drilled from leaking. The ideal solution for this is using a sealant and using it generously. First, make sure to clean the surface where the transducer will be mounted properly. Once complete, proceed to coat the entire back of your mounting plate with a layer of sealant. You can now go ahead and fix the mounting plate onto the transom using the stainless steel bolts. Again, please make sure all the bolts are coated in sealant, as it will prevent water from seeping in through the holes.

The following step on mounting the transducer on your boat will require a little bit of patience as you will have to give the sealant some time to dry off. Refer to the packaging to see how long the chosen brand recommends. However, prepare to wait, as it could take a couple of hours.

Most of the time, the transducer will come with stainless steel screws that can be attached to the mounting plate. However, if you have no choice but to purchase one that doesn't include stainless steel screws, we recommend buying some, as these work best underwater. Remember to use a screwdriver to tighten the screws properly.

Step Four: Connecting The Transducer Wires

After you have completed the mounting process, it’s time to connect the electrical components. 

Start by mounting the display unit on the control station of the boat, where you can keep a constant eye on the readings and connect the transducer more efficiently. Before you call it a day, it would be a good idea for you to test the sealant by pouring water over the bolts that you fitted earlier and check for leaks. If you see signs of leakage, dry the area and reapply the sealant and repeat the process.

Once you have verified the sealant has been properly applied, you have completed the final step in your DIY transducer mounting! 


Always remember to use the required safety equipment when working on your projects. Be aware of your working environment and eliminate any potential hazards that could cause harm to you or others around you. If you feel like this isn't a task you can manage by yourself, do not hesitate to seek professional assistance. It could prevent you from causing permanent damage to your boat. Finally, always remember to be safe when sailing and prepare yourself well in advance so that you won't be left facing a difficult situation in the middle of the water.