How to Clean Sea Strainers

Sea strainers, also known as raw-water strainers, play a crucial role in protecting your boat’s engine by filtering out debris and junk from the water used to cool it. Over time, these strainers can become clogged and dirty, which may affect their performance. Regular cleaning is essential to maintain their effectiveness and keep your boat running smoothly. Follow this guide to learn how to clean your sea strainers effectively.

Step 1: Prevention Is Key

Preventative maintenance can save you a lot of effort in the long run. Applying a foul-release coating to your sea strainer helps prevent debris buildup by creating a slick surface that makes cleaning easier. Regular application of this coating and routine inspections can keep your sea strainer functioning efficiently and reduce the frequency of deep cleanings.

Step 2: Disassembling the Sea Strainer

To thoroughly clean your sea strainer, you may need to disassemble it. While some modern sea strainers are designed for easy cleaning without disassembly, older models may require this step. Here’s how to approach it:

• Refer to the manufacturer’s manual to understand the disassembly process for your specific sea strainer model.
• If you are unsure, consider disassembling the strainer the first few times you clean it to check for hidden debris.
• Inspect all components for wear or damage before reassembling the strainer.

Step 3: Cleaning the Sea Strainer

Whether or not disassembly is required, the following steps will help you clean the sea strainer effectively:

1. Close the seacock: If the strainer’s filter or screen is below the waterline, be sure to close the seacock to prevent water from entering during cleaning.
2. Empty and clean the basket: Remove the strainer basket or bowl and empty any collected debris. Check the manufacturer’s cleaning instructions for specifics.
3. Rinse with fresh water: Use fresh water to rinse the screen and basket thoroughly. For stubborn debris, use a soft brush to gently scrub the components.
4. Inspect the parts: Look for cracks, damage, or excessive wear that may compromise the strainer’s effectiveness. Replace any damaged parts as needed.

Step 4: Reassemble and Test

Once the sea strainer is clean and dry, reassemble it carefully. Reopen the seacock and run the engine briefly to ensure water is flowing properly through the system. If you notice any issues, inspect the assembly to ensure all components are securely in place.