--- product_id: 649379544 title: "Marine Quickleen Engine and Fuel System Cleaner, 12 Ounces 92-8M0047931" brand: "mercury" price: "365 Lei" currency: RON in_stock: true reviews_count: 5 category: "Mercury" url: https://www.desertcart.ro/products/649379544-marine-quickleen-engine-and-fuel-system-cleaner-12-ounces-92 store_origin: RO region: Romania --- # Cleans 60 gallons fuel Removes stubborn carbon deposits Prevents engine knocking & seize-up Marine Quickleen Engine and Fuel System Cleaner, 12 Ounces 92-8M0047931 **Brand:** mercury **Price:** 365 Lei **Availability:** ✅ In Stock ## Summary > ⚡ Power up your engine’s potential with Mercury Quickleen! ## Quick Answers - **What is this?** Marine Quickleen Engine and Fuel System Cleaner, 12 Ounces 92-8M0047931 by mercury - **How much does it cost?** 365 Lei with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/649379544-marine-quickleen-engine-and-fuel-system-cleaner-12-ounces-92) ## Best For - mercury enthusiasts ## Why This Product - Trusted mercury brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Carbon Crusher:** Eradicates carbon buildup from carburetors, injectors, valves, and spark plugs to boost performance. - • **Engine Guardian:** Prevents knocking and piston seize-up, protecting your investment during every ride. - • **Spark Plug Longevity:** Extends spark plug life, reducing maintenance frequency and costs. - • **Trusted Marine Grade:** Used by pros, with a 4.8-star rating from 784 reviews—quality you can rely on. - • **Fuel System Revitalizer:** Treats up to 60 gallons for a deep clean that keeps your engine running smoother, longer. ## Overview Mercury Marine Quickleen Engine and Fuel System Cleaner is a professional-grade 12 fl oz treatment that cleans carbon deposits from critical engine parts, treats up to 60 gallons of fuel, prevents engine knocking and piston seize-up, and extends spark plug life. Highly rated by marine engineers, it ensures peak engine performance and longevity. ## Description Engine and fuel system cleaner 12 fl oz bottle Treats 60 gallons of fuel Quickly and thoroughly remove carbon deposits from carburetors and injectors, intake valves, spark plugs, piston crowns and cylinder heads Prevent engine knocking and piston seize-up Extend spark plug life Does not contain fuel stabilizers Use with Quickare to prevent fuel breakdown Review: Works - Good product Review: Best I’ve found in a fuel system cleaner. - Mercury Quickleen was recommended by local Mercury repairman with over 30 years of experience. He states that it outperforms Seafoam and even the other fuel treatments that Mercury has. After a clogged jet in one of my carburetors, I started using it. My outboard has never ran better. If you’re concerned about deposits in your fuel system, I really don’t think you can do better than this product and I intend to keep using it. ## Features - Quickly and thoroughly remove carbon deposits from carburetors and injectors, intake valves, spark plugs, piston crowns, and cylinder heads - Prevent engine knocking and piston seize-up - Extend spark plug life ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003ZF1GJQ | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #84,259 in Automotive ( See Top 100 in Automotive ) #98 in Automotive Fuel System Cleaners | | Brand | MERCURY | | Brand Name | MERCURY | | Compatible with Vehicle Type | Watercraft | | Core Material | Platinum | | Core material | Platinum | | Customer Reviews | 4.8 out of 5 stars 818 Reviews | | Manufacturer | Mercury Marine Mercruiser | | Manufacturer Part Number | 8M0047931 | | Model Number | 8M0047931 | | OEM Equivalent Part Number | 8M0047931 | | Thread Size | RM | | Thread size | RM | | UPC | 745061870192 | | Vehicle service type | Watercraft | ## Product Details - **Automotive Fit Type:** Universal Fit - **Brand:** MERCURY - **Core material:** Platinum - **Thread size:** RM - **Vehicle service type:** Watercraft ## Images ![Marine Quickleen Engine and Fuel System Cleaner, 12 Ounces 92-8M0047931 - Image 1](https://m.media-amazon.com/images/I/51EhZmXtA7L.jpg) ## Questions & Answers **Q: o2 sensor safe ?** A: This is used for Marine Engines ie Mercury brand, in which they don't have o2 sensors. If your using it in a car, your wasting a ton of money vs STP or something and i will ruin o2 sensor on a car **Q: Is this how they call quickleen lubricant** A: Hi too the best of my knowledge it is fuel system cleaner nothing more however it may have some lubricating qualities. I do know that it works well if you use it on a regular basis.I use quickleen 1 with every fill up along with stabil for marine use it helps keep the moisture out of the fuel system. **Q: will this cleaner free up compression relies valves?** A: I use this more on the preventative side and not fixing carbon build up or other material build up. I do understand you can use a higher dose of this additive and run the engine at lower rpms to help eliminate some of the build up. All depends on how dirty your valves have gotten. I have been using this additive for the past three years or almost 1800 hours on my engine. I have never had any issues with build up. **Q: Does it also act as a gass stabilizer for winter storage?** A: It is a fuel system and injector cleaner. I used Marine Stabilizer in my fuel tank for winter storage. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works *by B***. on 2 August 2025* Good product ### ⭐⭐⭐⭐⭐ Best I’ve found in a fuel system cleaner. *by B***. on 3 October 2026* Mercury Quickleen was recommended by local Mercury repairman with over 30 years of experience. He states that it outperforms Seafoam and even the other fuel treatments that Mercury has. After a clogged jet in one of my carburetors, I started using it. My outboard has never ran better. If you’re concerned about deposits in your fuel system, I really don’t think you can do better than this product and I intend to keep using it. ### ⭐⭐⭐⭐⭐ Does what they it will do *by K***N on 6 September 2026* This does exactly what they said it would do I put it in my motorcycle and it cleaned up the carb no it runs smoother and better good quality product so good I have bought 5 since my first one I bought ## Frequently Bought Together - Mercury Quickleen Engine & Fuel System Cleaner - Mercury Marine Quickare Fuel Treatment, 12 Ounces 92-8M0047930 - Mercury Marine 12oz Quickstor Fuel Stabilizer Treatment 92-8M0047932 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ro/products/649379544-marine-quickleen-engine-and-fuel-system-cleaner-12-ounces-92](https://www.desertcart.ro/products/649379544-marine-quickleen-engine-and-fuel-system-cleaner-12-ounces-92) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-11-05*