Mercury – Quickleen Engine & Fuel System Cleaner | Fuel System Care | Liquid Formula | 8M0047921

Overview

There’s a certain calm that comes from hearing your engine settle into a smooth, confident idle the kind that tells you the fuel system is clean and breathing easily. If you spend enough time on the water, you know how quickly carbon can build up and steal that effortless performance. Quickleen brings that clean-running feeling back. With just a little added at each fill-up, you’ll notice your engine responding sharper, starting easier, and running with the kind of smoothness that makes every trip feel a bit more dialed-in. It’s peace of mind in a bottle, especially when you’re miles from the dock and counting on everything to work exactly as it should.

Key Features

• Cleans carbon deposits from injectors, carburetors, intake valves, spark plugs, piston crowns, and cylinder heads
• Improves engine response and helps prevent knocking or piston seize-up
• Gas treatment that works with all grades of gasoline and ethanol blends
• Safe for both two-cycle and four-cycle engines
• Extends spark plug life by reducing carbon fouling
• Designed for routine use 1 oz treats 5 gallons of gasoline
• Manufactured to Mercury Marine’s original equipment standards

Engine & Boat Compatibility

• Compatible with all Mercury outboards (two-stroke and four-stroke)
• Works with MerCruiser sterndrive and inboard engines
• Useful across small portable outboards, high-horsepower offshore engines, pontoons, bass boats, and more
• Also approved for use in non-marine gasoline engines: lawn equipment, snowmobiles, ATVs, motorcycles, and generators
• Safe for catalyzed engines

Performance & Practical Benefits

A dirty fuel system robs power slowly, so you rarely notice it happening—until you clean it. Quickleen removes the carbon buildup that creeps into injectors, valve seats, and piston crowns over time. As the deposits dissolve, the engine breathes easier, combustion becomes more complete, and throttle response tightens up noticeably. That means smoother acceleration, more reliable hot starts, and a steadier idle when you’re maneuvering around the dock.

Carbon buildup is one of the leading causes of spark plug fouling and poor burning efficiency. By clearing out those deposits, Quickleen helps extend plug life and keeps your ignition system firing clean. You’ll spend less time troubleshooting rough running and more time enjoying the boat the way it’s meant to be used—steady, predictable, and ready whenever you are.

Why Buy OEM

There’s a reason experienced boaters reach for Mercury’s own fuel treatments. They’re formulated under the same strict standards that Mercury uses for its engines, so the chemistry is designed around real-world marine fuel challenges—ethanol blends, carbon accumulation, and long periods of storage. Aftermarket cleaners can be too aggressive or poorly balanced, but Quickleen is engineered to clean thoroughly without damaging sensitive components. It’s a practical, cost-effective way to protect your investment and keep your engine running like it should season after season.

FAQ

Q1: Which Mercury engines does Quickleen work with?

All gasoline-powered Mercury outboards, plus MerCruiser sterndrive and inboard engines.

Q2: What sets Quickleen apart from aftermarket cleaners?

It’s engineered to Mercury Marine OEM standards for safe, thorough carbon cleaning.

Q3: How do I know if this is right for my setup?

If your engine runs gasoline—whether two-cycle or four-cycle—Quickleen is compatible.

Q4: Is it suitable for both saltwater and freshwater boating?

Absolutely. Fuel system deposits happen in all environments.

Q5: Is it easy for most boaters to use?

Yes just follow the simple dosing instructions: 1 oz treats 5 gallons of fuel.

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