Maintaining your sounder / graph (let’s just call it a fish finder) connectors, plugs and potential water ingress points (map / card door) is a simple but essential task, especially if you’re operating in salt water. Exposure to moisture, salt, and dirt can quickly lead to corrosion, poor connections, and potential total equipment failure. This guide walks through a straightforward process to keep your fish finder clean, dry, and protected.
Why Fish Finder Maintenance Matters #
Fish finders are often exposed to harsh conditions. Saltwater, dust, and general grime can result in corrosion which can build up over time, leading to unreliable performance or permanent damage. Regular servicing helps extend the life of your equipment and reduces the risk of costly repairs or replacement, there’s really not much to it either.
Tools and Materials Required #
Before starting, gather the following:
- Clean rag or cloth
- Electrical or contact cleaner spray (non conductive / no residue)
- Cotton ear buds
- Dielectric grease
Step 1: Inspect #
Begin by checking both the plug and connectors carefully. Look for any signs of salt buildup, grime, moisture, or corrosion (green / white) on the pins. Also inspect the O-Ring and locking collar for any visible damage. With the map door, examine also for corrosion on the metal contacts and signs of water ingress. Inspect the rubber seal for any sign of damage.
Step 2: Apply Cleaner #
Spray an electrical contact cleaner directly onto the connector and into the plug. Make sure all contact points are coated, including inside the socket. The cleaner will help break down salt residue, dirt, and contaminants. Do not do this to the map door, apply cleaner to the cotton ear bud and use the ear bud to clean.
Step 3: Wipe Away Residue #
Using a clean cloth, wipe down the connector using the clean rag and cotton buds to remove excess cleaner and any loosened debris. If the connector is heavily soiled, repeat the cleaning process until it is fully clean. Allow all parts to dry thoroughly.
Step 4: Protect With Grease #
Use a small amount of dielectric grease to create a barrier. The grease should ideally not be on the actual electrical contact points, but on the sealing surfaces to create a waterproof barrier. The O-rings on the leads and the gasket on the map door are the ideal places.
Step 5: Install a Connector Protector #
Install a BerleyPro Connector Protector which will further shield the connector and plug, providing a barrier to water and grime ingress whether the fish finder is on or off the boat.
