Mercury – Quickleen Engine and Fuel System Cleaner | Fuel Care System | Liquid Formula | 8M0058691

Overview

Anyone who’s spent time on the water knows how quickly an engine’s personality can change when carbon builds up or fuel quality slips. One day it’s running smooth and confident, and the next it’s hesitating, knocking, or feeling a little tired when you lean on the throttle. That’s why having something you trust to keep the fuel system clean makes such a difference. Mercury Quickleen Engine and Fuel System Cleaner brings that steady reassurance — the kind that shows up every time the motor fires cleanly and settles into a smooth, even idle. It’s a simple step that pays off every time you head out.

Key Features

• Removes carbon deposits from carburetors, injectors, intake valves, spark plugs, piston crowns, and cylinder heads
• Helps prevent engine knocking and reduces the risk of piston seize-up
• Use occasionally throughout the season — 1 oz treats 5 gallons of gasoline
• Safe for two-stroke and four-stroke engines, both carbureted and fuel-injected
• 32 oz bottle
• Mercury Marine part number 8M0058691

Engine & Boat Compatibility

• Works with most Mercury outboard engines across a wide horsepower range
• Compatible with many sterndrive and inboard gasoline systems
• Ideal for fishing boats, pontoons, runabouts, center consoles, and cruisers
• Also suitable for non-marine engines: ATVs, snowmobiles, motorcycles, lawn equipment, chainsaws, and more
• Safe for catalyzed engines

Performance & Practical Benefits

The difference Quickleen makes is something you can feel — not in a dramatic way, but in the steady, dependable way a well-cared-for engine responds. Once the carbon starts to clear, idle smooths out, throttle hesitation disappears, and the motor regains that crisp, confident tone you expect. It’s especially noticeable in older engines or in machines that see long periods of sitting between uses.

Carbon buildup is one of the most common causes of lost power and rough performance in gasoline engines. Quickleen tackles that directly. It cleans the parts that matter: pistons, valves, injectors, even spark plugs. The result is a cleaner burn, stronger response, and fewer surprises when you push away from the dock or squeeze the throttle out on open water.

It also helps protect internal components by preventing knock and reducing the chance of piston seize-up. For boaters who rely on their engines far from shore, that kind of prevention isn’t optional — it’s the foundation of safe, predictable operation. Quickleen keeps everything tight, smooth, and reliable so you can enjoy the ride instead of worrying about what’s happening inside the engine.

Why Buy OEM

A genuine Mercury Marine part carries the weight of decades of testing and engineering behind it. Quickleen isn’t a generic cleaner made to work “well enough.” It’s formulated to handle real marine conditions — long hours, changing loads, and fuel that doesn’t always stay fresh. Aftermarket products may claim similar benefits, but OEM parts are held to a higher standard. With Quickleen, you’re choosing consistency, protection, and a cleaner-running engine season after season. That’s a practical choice any experienced boater can appreciate.

FAQ

Q1: Which Mercury engines or systems does Quickleen fit?

It works with most gasoline Mercury engines, from portable outboards to high-horsepower models, plus sterndrives and inboards.

Q2: What makes this product different from aftermarket cleaners?

It’s designed to Mercury’s original equipment standards, offering proven carbon removal and safer operation under marine conditions.

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

If your engine runs gasoline and you want to restore clean performance or prevent carbon buildup, Quickleen is a solid match.

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

Yes — as long as the engine uses gasoline, Quickleen works the same in both environments.

Q5: Is installation straightforward?

Very. Just add the appropriate amount to your fuel tank and run the engine as normal.