--- product_id: 5311765 title: "Mercury 8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz" brand: "mercury" price: "R774" currency: ZAR in_stock: true category: "Mercury" url: https://www.desertcart.co.za/products/5311765-mercury-8m0047931-quickleen-engine-and-fuel-system-cleaner-12-oz store_origin: ZA region: South Africa --- # 1 oz treats 5 gallons fuel Removes carbon deposits fast OEM spec engineered Mercury 8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz **Brand:** mercury **Price:** R774 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your engine’s potential with Mercury Quickleen! ## Quick Answers - **What is this?** Mercury 8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz by mercury - **How much does it cost?** R774 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/5311765-mercury-8m0047931-quickleen-engine-and-fuel-system-cleaner-12-oz) ## 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 - • **Fuel-Smart Formula:** Just 1 oz revitalizes 5 gallons of gasoline, making maintenance effortless and cost-effective. - • **Trusted OEM Quality:** Crafted by Mercury Marine to exacting original equipment standards for reliable, proven results. - • **Carbon-Crushing Power:** Eliminates stubborn deposits from carburetors, injectors, valves & more for peak engine efficiency. - • **Versatile Engine Care:** Safe for all 2-stroke & 4-stroke carbureted and fuel-injected engines, including marine and powersports. - • **Knock-Free Performance:** Prevents engine knocking and piston seize-up, protecting your investment season after season. ## Overview Mercury 8M0047931 Quickleen Engine & Fuel System Cleaner is a premium 12 oz additive designed to remove carbon buildup and prevent engine knocking across a wide range of gasoline engines. Engineered to OEM specs by Mercury Marine, it treats 5 gallons of fuel per ounce and is safe for both 2-stroke and 4-stroke engines, ensuring cleaner combustion, extended spark plug life, and smoother performance throughout the season. ## Description Put a halt to fuel-related issues with Mercury Quickleen Engine and Fuel System Cleaner 8M0047931. Designed to be used throughout the season, Quickleen quickly and thoroughly removes carbon deposits from internal engine components. It also prevents engine knocking and piston seize-up, and can help extend spark plug life. Part of the complete Mercury Fuel Care System, Quickleen is safe for use in all 2‑stroke and 4‑stroke carbureted and fuel‑injected gasoline engines, including cars, trucks, motorcycles, ATVs, snowmobiles, marine engines, lawn mowers, chainsaws, string trimmers and snow blowers. Safe for catalyzed engines. 1 ounce treats 5 gallons of fuel. ## Features - Removes carbon deposits from carburetors, injectors, intake valves, spark plugs, piston crowns and cylinder heads - Prevents engine knocking and piston seize-up - Use occasionally throughout the season - just 1 ounce treats 5 gallons of gasoline - Produced by Mercury Marine to our stringent original equipment manufacturer specifications - Does not contain fuel stabilizers. Use Mercury Quickare to prevent fuel breakdown and oxidation. - Mercury oils, lubricants and engine care products are backed by decades of experience in engineering, testing and manufacturing to provide the best protection and performance. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003ZF1GJQ | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #17,093 in Automotive ( See Top 100 in Automotive ) #39 in Fuel System Cleaners | | Brand Name | MERCURY | | Compatible with Vehicle Type | Watercraft | | Customer Reviews | 4.8 4.8 out of 5 stars (834) | | Included Components | 1 Bottle | | Manufacturer | Mercury Marine Mercruiser | | Manufacturer Part Number | 8M0047931 | | Manufacturer Warranty Description | 1 Year | | Model Number | 8M0047931 | | OEM Equivalent Part Number | 8M0047931 | | Thread Size | RM | | UPC | 745061870192 | ## Product Details - **Brand:** MERCURY - **Number of Items:** 1 - **Number of Packs:** 1 - **Thread Size:** RM - **Vehicle Service Type:** Watercraft ## Images ![Mercury 8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz - 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. ## 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.co.za/products/5311765-mercury-8m0047931-quickleen-engine-and-fuel-system-cleaner-12-oz](https://www.desertcart.co.za/products/5311765-mercury-8m0047931-quickleen-engine-and-fuel-system-cleaner-12-oz) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-18*