How to Install a Fish Finder

How to Install a Fish Finder
A fish finder is a device that uses sonar technology to aid anglers in viewing objects underwater. Numerous companies manufacture fish finders, giving you a variety of options to choose from. There are many variations, depending on the brand and model of your device. Always consult with the product manual to ensure proper installation. When installed and used properly, fish finders can significantly increase your chances of finding game fish.


Difficulty: Moderate

Install the Transducer

Things You’ll Need:
  • Boat
  • Drill and bits
  • Pencil
  • Screwdriver
  • Silicone sealant
  • Mounting hardware
  • Cable clamps
Step 1
Determine where you want the transducer. Choose a spot on your boat's hull that is without any protrusions or interference. Keep in mind that the mounting area must be in contact with water at all times.
Step 2
Hold the mounting template at the spot where you intend to place the transducer and use a pencil to mark the position of the mounting holes on the template.
Step 3
Drill the holes using the power drill bit for your mounting bracket and attach the transducer to the bracket that came with the fish finder. Align the holes and apply sealant to prevent leaking. Screw the bracket and transducer to your boat's hull and tighten. The transducer is now installed.

Route the Cables

Step 1
Prepare the cable clamps. You need to route the cables from the installed transducer to the fish finder control head over the transom by securing the cable with the clamps.
Step 2
Drill two holes side by side for the transducer cable and cable wires. Put in the transducer cable up and through the holes from below and place the power cable down from the top. All holes must be sealed with silicone sealant to prevent leaks.
Step 3
Continue to run the cable wires along internal conduits until you reach the fish finder control head. Secure with the clamps over the transom and run the wires through the hole and follow the conduit same as over your boat's transom. Fill all holes with sealant.
Step 4
Attach the cable wires to the control head, secure the cable and roll up any excess wires.

Mount the Control Head

Step 1
Assemble the base to the control head's mounting brackets depending on the instructions that came with your device.
Step 2
Screw down the base and attach the fish finder using all provided hardware parts and tighten.
Step 3
Hook up the power source or battery and plug in the two connections. Turn the unit and start troll fishing; your fish finder is now installed.

Tips & Warnings

Make sure the mounting template and the transducer are leveled and aligned vertically before you drill holes.
Ensure that the mount placement through the transom is above the water line.
Consult and follow specific instructions from your product's manual for proper handling and installation as each product may vary.

Article Written By Rona Aquino

Rona Aquino began writing professionally in 2008. As an avid marathon runner and outdoor enthusiast, she writes on topics of running, fitness and outdoor recreation for various publications. Aquino holds a Bachelor of Arts in communications and English from the University of Maryland College Park.

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