Mercury – Quicksilver Quickleen Engine and Fuel System Cleaner | Fuel Treatment | Liquid Formula | 8M0047921

Overview

If you’ve ever noticed an engine that just doesn’t feel as smooth as it used to, chances are the fuel system is asking for attention. This Quicksilver Quickleen cleaner is one of those products you keep on hand because it quietly keeps everything running the way it should. Pour it in, run the engine, and let it do the work in the background. It’s simple peace of mind, especially when you’re relying on your engine far from the dock or deep into a long weekend of use.

Key Features

• Cleans and protects gasoline engine fuel systems

• Liquid fuel treatment designed for regular use

• Twelve ounce bottle with easy pour design

• One ounce treats five gallons of gasoline

• Helps remove carbon buildup throughout the combustion system

• Controls gum, varnish, and corrosion caused by ethanol-blended fuel

• Safe for engines equipped with catalytic converters

• Designed to meet Mercury Marine performance standards

Engine & Equipment Compatibility

• Suitable for two-cycle and four-cycle gasoline engines

• Compatible with carbureted and fuel-injected systems

• Commonly used in marine outboards and sterndrive engines

• Works well in cars, trucks, motorcycles, and utility vehicles

• Ideal for lawn equipment such as mowers, trimmers, and blowers

• Safe for use in freshwater and saltwater marine applications

Performance & Practical Benefits

In real use, Quickleen works quietly but effectively. Engines tend to idle smoother, throttle response feels more immediate, and cold starts are often easier after consistent use. By cleaning carbon deposits from injectors, intake valves, spark plugs, piston crowns, and combustion chambers, it helps restore performance that slowly fades over time. It also helps prevent knocking and piston-related damage that can come from dirty fuel systems. Because it can be used at every fill-up, it fits easily into regular maintenance routines without extra steps or tools. Over time, that consistency helps extend spark plug life and keeps fuel systems cleaner, reducing the need for more invasive service.

Why Buy OEM

Choosing a genuine Mercury Marine part like Quicksilver Quickleen means trusting a formula developed with marine engines in mind. Fuel treatments are not all the same, and generic options often overlook the challenges created by ethanol-blended gasoline. This cleaner is engineered to address those issues directly, especially corrosion and phase separation. Using an OEM product helps protect your engine long-term and often costs less than dealing with clogged injectors or rough-running engines down the road. It’s the kind of advice seasoned boaters pass along because it works.

FAQ

Which Mercury engines or systems does Quickleen fit?
Quickleen is designed for use in all gasoline engines, including Mercury Marine outboards, sterndrives, and other marine engines.

What makes this cleaner different from aftermarket alternatives?
It is formulated specifically to address marine fuel challenges, including ethanol-related buildup and corrosion, while meeting original equipment standards.

How do I know if this is the correct product for my setup?
If your engine runs on gasoline, whether carbureted or fuel injected, Quickleen is appropriate. Match the part number 8M0047921 to ensure authenticity.

Can this be used in both saltwater and freshwater applications?
Yes. It is suitable for engines used in both environments and helps protect against moisture-related fuel issues.

Is application straightforward for most boat owners?
Yes. Simply add the correct amount to the fuel tank during fill-up. No tools or special steps required.