How to Install a Fishfinder On a Fiberglass Boat

Fishfinder is a great device to locate the fish. After buying a fishfinder You may think what is the best place for your boat to install this device. Some people use it to the front side of the boat and some people use it to the rear side. It’s basically up to the hull construction to select the installing place. It also depends on the Type of boat and the pre-installed bracket by the manufacturers. If you have a fiberglass boat and want use a fishfinder for the first time. But you are little nervous about the installation process then, here is the step by step process for you. Hope this guideline will help you to install the fishfinder on your fiberglass boat correctly.

Find the Right Type of Transducer:

All fishfinder is not equally being used for every type of boat. For fiberglass hull, you can install a transducer that is made of bronze or plastic material. Don’t use a stainless-steel transducer which is specially made for alloy or steel made hulls.

Mount According to the Hull Construction:

In most cases mounting the fishfinder depends on the type of hull construction of the boat. For displacement hull, you should mount the transducer to the front side of the boat. Mount the hull in the center point of the boat keeping a distance of 1/3 from the front edge of the hull.

To install a fishfinder under a planning hull you should mount the fishfinder to the rear side of the boat. Whether you have an inboard or outboard engine, you should install it forward to the propeller.

If your boat has a stepped hull mount the transducer on the first step.

For Fin keel and full keel sailboats, do the same like displacement hull. But mount the transducer any side of the hull at a minimum angle that goes under the water.

Get the Installing Tools And Equipment:

The tools that will be needed to install the fishfinder are Drill, Drill bits, Socket set, and Permanent marker. And don’t forget these Bolts, Locknuts, Metal washers, Marine epoxy, and Cable ties. Each and every tool are so necessary to install the fishfinder perfectly.

Attach the Bracket:

Place the bracket where you want to install the fishfinder. Then mark through the holes using the parament marker. After marking the points use your drill machine to make the holes under the hull of the boat. You can use a safety goggles to protect your eyes while drilling in the hull. When the hole making process is done attach the bracket to the hull using the bolts lock nut and two metal washers in every hole. After tightening the nuts use the Marine epoxy to seal the nuts. It will keep your boat safe from water leaking.

Set the Fishfinder on the Bracket:

To attach the fishfinder to the bracket again use a single bolt, nuts, and metal washers. You can also use rubber washers to attach the fishfinder to the bracket. The small metal bracket is so good to set the fishfinder in right place. To keep your fishfinder safe, you can use a fishfinder shield. On the shallow water, there is a heavy chance of hitting the transducer with rocks and other obstructions.

How To Use A Fishfinder

Attach the Cable:

Some manufacturers try to use a single cable in their transducer. Whether your fishfinder comes with a single cable or double cable you need to tie the cable with cable ties. Basically, there are two cables inside the single cable. One is to display the readings and another is to take power from the battery.

To attach the cable with transducer a reading display, you need to drill another hole through the hull. Then cut the cable and enter it through the hole. If the cable is not cuttable then you have to choose a transducer that comes with larger cable. After entering the cable through the hull reattach the cable. Then use Marine epoxy to seal the hole again. Don’t let the cable floating under the hull. Use scotch tape or glue to attach the cable to the hull.

So, these are the process to install the fishfinder on a fiberglass boat. Whether you are mounting the fishfinder on transom, thru-hull and in hull locate a position where the water surface is smooth and do not create large waves of bubbles.

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