Mercury MerCruiser Quicksilver Quickleen Fuel Treatment 8M0048211
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Mercury / MerCruiser Quicksilver Quickleen Fuel Treatment — 8M0048211
The Mercury Quicksilver Quickleen 8M0048211 is an OEM engine and fuel system cleaner designed to remove carbon deposits and keep marine fuel systems operating efficiently. It’s commonly used in Mercury outboards and MerCruiser engines as part of Mercury’s recommended fuel-care program.
What It Does
Quickleen is formulated to clean internal engine and fuel system components, including:
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Carburetors
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Fuel injectors
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Intake valves
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Spark plugs
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Piston crowns
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Cylinder heads
By removing carbon buildup, it helps engines run smoother and maintain performance.
Key Benefits
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Removes carbon deposits that reduce engine efficiency
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Helps prevent engine knocking and piston seizure
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Extends spark plug life
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Keeps fuel injectors and carburetors clean
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Works with ethanol-blended gasoline
Compatible Engines
Safe for use in all gasoline marine engines, including:
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Mercury outboards (2-stroke and 4-stroke)
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MerCruiser sterndrive engines
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Carbureted and fuel-injected engines
Dosage
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1 oz treats 5 gallons of gasoline
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A 12-oz bottle treats about 60 gallons of fuel
It can be used periodically throughout the boating season.
Where It Fits in Mercury’s Fuel Care System
Mercury recommends a three-step fuel treatment program:
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Quickare – fuel conditioner and stabilizer (used regularly)
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Quickleen – carbon and deposit cleaner
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Quickstor – long-term fuel stabilizer for storage
Quickleen is the cleaning step that removes carbon buildup from normal engine operation.
⚠️ Service Tip:
Quickleen does not stabilize fuel. If fuel will sit in the tank for long periods, Mercury recommends using Quickstor in addition to Quickleen.
Shipping: Ships same or next day for fast Canada wide shipping.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.