Mercury – Quicksilver Quickleen Engine and Fuel System Cleaner | Fuel Additive | Liquid Formula | 8M0058681

Overview

There’s a certain relief that comes from knowing your engine is breathing clean and burning steady. Anyone who spends time on the water knows the sound of a motor that’s running right — smooth, confident, without the slightest stumble. That feeling doesn’t happen by accident. It comes from taking care of the small things, like using a cleaner you can trust to keep carbon at bay and fuel flowing the way it should. Quicksilver Quickleen Engine and Fuel System Cleaner delivers that kind of dependability, and you feel it every time you throttle up or settle into a quiet idle at the dock.

Key Features

• Fuel system cleaner designed for two-cycle and four-cycle gasoline engines
• Liquid formula that treats carbon buildup in carburetors, injectors, intake valves, spark plugs, piston crowns, and cylinder heads
• Helps prevent engine knocking and reduces the chance of piston seize-up
• Works with all grades of gasoline, including ethanol-blend fuel
• One ounce treats five gallons of fuel
• Mercury Marine part number 8M0058681

Engine & Boat Compatibility

• Safe for use in most Mercury outboards, from small portable motors to high horsepower models
• Works with many sterndrive and inboard engines that run gasoline
• Ideal for bass boats, pontoon boats, center consoles, runabouts, and cruisers
• Also compatible with snowmobiles, lawn equipment, motorcycles, and other gasoline engines

Performance & Practical Benefits

Quickleen has a way of restoring an engine’s personality. You’ll notice it after a tank or two — the throttle feels livelier, the idle settles into a steady rhythm, and the motor sounds sharper. That’s what happens when carbon gets cleared out and fuel paths open up again. It gives your engine a fresh start without pulling anything apart.

By removing heavy deposits from injectors and intake systems, Quickleen helps keep fuel burn clean and balanced. You might feel smoother acceleration when you push into open water, or a quieter hum as you ease back toward the marina. It also protects the parts you don’t see: spark plugs stay cleaner longer, valves stay freer, and the whole combustion chamber simply works with less strain. That means fewer surprises, fewer hesitations, and more days where everything feels easy and predictable.

Why Buy OEM

A genuine Mercury Marine part is designed with long-term reliability in mind. Quickleen isn’t a generic cleaner tossed into a bottle — it’s a formula engineered through years of testing on real engines, in real conditions. When you choose OEM, you’re choosing a product created for the exact way marine engines operate: long hours, shifting loads, and fuel that sometimes sits longer than we’d like. It’s cost-effective, dependable, and made to perform right the first time. If you want a fuel additive that actually does what it claims, this is the one seasoned boaters reach for.

FAQ

Q1: Which Mercury engines or systems does Quickleen fit?

Quickleen is safe for most Mercury gasoline engines, including portable outboards, large outboards, sterndrives, and inboards.

Q2: What makes this product different from aftermarket cleaners?

It’s designed specifically for marine performance and tested through Mercury’s rigorous standards, ensuring reliable carbon removal and protection.

Q3: How do I know if this is the correct replacement for my setup?

If your engine runs on gasoline and you want to remove or prevent carbon buildup, Quickleen is a suitable and safe choice.

Q4: Can this be used in both saltwater and freshwater environments?

Yes, Quickleen works the same regardless of where you boat, as long as the engine runs gasoline.

Q5: Is installation straightforward for most boat owners?

Absolutely — simply pour the recommended amount into your fuel tank at fill-up and let the engine do the rest.