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Flush Port Quick Connect for Mercury

$89.99 USD

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Color Black White

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In stock • Ships by Sat, Jul 11

Flushing your Mercury outboard shouldn’t feel like a wrestling match — but if you’ve ever struggled with that impossible factory flush port cap, you know it often does.

Even on brand-new engines, removing the OEM cap is frustrating. It's wedged in tight, and many owners end up damaging or stripping it while trying to pry it loose with tools. The Flush Port Quick Connect for Mercury Outboards eliminates all that hassle, permanently.

This easy-to-install upgrade replaces the factory cap system with a secure quick-connect fitting that’s simple to use. No more digging at stuck caps, threading and unthreading hoses, or fighting to wedge the cap back into place after flushing. Just snap on, flush, and snap off—it’s that easy.

Our design also improves on Mercury’s original cap with a larger, more visible weephole indicator. Like the OEM design, this small drainage port helps detect check valve issues — but ours is easier to monitor at a glance, giving you faster warning and greater peace of mind.

Built tough for saltwater environments and daily use, the Flush Port Quick Connect is the smarter, faster way to protect your Mercury outboard — whether you’re flushing at the dock, on a trailer, or in dry storage.

Use it with a standard reinforced hose, or pair it with a Flushmaster system for the ultimate convenience.

NOTE: The opening in the top of the Mercury Quick Connect cap serves as an indicator of check valve failure and is required by the OEM

Product Patented

Spray It On: Apply directly to salt-covered surfaces — or flush through your engine.
Let It Sit: Wait 2–5 minutes while the formula dissolves salt buildup.
Rinse or Wipe Clean: Wash it off with fresh water or wipe with a cloth. That’s it.

After boating, jet skiing, or fishing in saltwater
Flushing outboard and inboard marine engines
Cleaning trailers and wheel wells exposed to winter road salt
Maintaining reels, rods, dive gear, and underwater camera equipment
Protecting cars, trucks, RVs, ATVs, and off-road vehicles

Is this safe for all surfaces?

Yes! Our formula is safe to use on fiberglass, gelcoat, painted surfaces, metal, chrome, plastic, rubber, and vinyl. It’s non-abrasive and leaves no residue behind.

Can I use this on my boat engine?

Absolutely. Cancel The Salt is engine-safe and designed for use in marine engine flush systems. It helps dissolve internal salt deposits, which can boost performance and extend engine life.

Do I need to scrub the salt off?

Nope. Just spray it on, let it sit for a few minutes, and rinse or wipe clean. The chemistry does the heavy lifting — no harsh scrubbing required.

Does it leave a coating or residue?

It leaves behind an invisible protective barrier that helps repel moisture and prevent salt from sticking again — but it won’t leave any greasy film or buildup.

Can I use it on my vehicle?

Yes — it works great for removing road salt from cars, trucks, trailers, and underbodies. It’s safe for paint and chrome, and helps prevent rust and corrosion.

How often should I use it?

After every saltwater outing or salty road exposure is ideal. For best results, use it as part of your regular maintenance routine — especially before storage.

Will it harm decals, wraps, or wax?

No. It’s designed to be gentle on coatings while still being tough on salt. Always test on a small area if you’re unsure, but most wraps, waxes, and decals are unaffected.