Boating in Australia is all about freedom, salt air, and sunny days. But what happens when the trip’s over? If you’re hitting saltwater regularly, flushing your engine after every outing isn’t optional, it's essential. Without it, salt and grime can corrode your engine from the inside out. This simple step-by-step guide will walk you through how to flush your boat engine properly and protect your investment.
Why Flushing Matters
Saltwater can accumulate in your engine’s internal cooling passages. Over time, this leads to corrosion, reduced performance, and even engine failure. Flushing your engine after every saltwater trip removes salt, sand, and debris extending the life of your boat and saving you money in repairs.
What You’ll Need
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Freshwater access (hose)
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Engine flushing muffs or a flushing port
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Salt-removing solution like Salty Captain's Engine Flush
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Foam gun or flushing tool like The Captain’s Musket
Step-by-Step Engine Flush Guide
Step 1: Park & Prepare
After towing your boat out of the water, find a safe spot to flush your engine ideally with access to a hose and drainage. Make sure your engine is in a vertical position to ensure full drainage.
Step 2: Attach the Flushing Tool
If your engine uses flush muffs, place them over the water intakes and connect the hose. If you have a built-in flush port, remove the cap and attach the hose directly. If using Salty Captain’s Engine Flush Kit, connect The Captain’s Musket for an easy one-step rinse and protect cycle.
Step 3: Add Engine Flush Solution
For best results, add a marine-safe engine flush solution to break down salt and grime. Salty Captain’s Engine Flush is formulated to target salt buildup and provide light anti-corrosion protection.
Step 4: Run the Engine
Turn on the water first, then start your engine and let it idle. Allow water (and solution) to circulate through the cooling system for 5–10 minutes. Never run the engine dry!
Step 5: Rinse & Shut Down
Turn off the engine first, then the water. Detach all equipment and allow excess water to drain. Wipe down the exterior if needed.
Pro Tip: Flush After Every Saltwater Use
Even a quick trip in saltwater can leave damaging residue. Make flushing part of your post-trip routine. It takes just 10 minutes and can save you thousands in repairs.
Final Word
Flushing your boat engine is a small task with massive benefits. With the right tools and a few minutes of your time, you’ll keep your motor running strong and avoid costly damage. For a fast, effective flush every time, check out our Engine Flush Kits.