---
product_id: 5311765
title: "8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz"
brand: "mercury"
price: "€ 53.16"
currency: EUR
in_stock: true
reviews_count: 9
category: "Mercury"
url: https://www.desertcart.com.cy/products/5311765-8m0047931-quickleen-engine-and-fuel-system-cleaner-12-oz
store_origin: CY
region: Cyprus
---

# 12 fl oz treats 60 gallons fuel Prevents engine knocking & seize-up Removes carbon deposits fast 8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz

**Brand:** mercury
**Price:** € 53.16
**Availability:** ✅ In Stock

## Summary

> ⚓ Keep your engine sailing smooth — no carbon left behind!

## Quick Answers

- **What is this?** 8M0047931 Quickleen Engine & Fuel System Cleaner, 12 oz by mercury
- **How much does it cost?** € 53.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/5311765-8m0047931-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

- • **Spark Plug Savior:** Extends spark plug life for smoother, more reliable starts
- • **Carbon Cleanup Power:** Aggressively removes deposits from carburetors, injectors, valves, and more
- • **Engine Longevity Boost:** Prevents knocking and piston seize-up to extend engine life
- • **Marine-Grade Reliability:** Trusted by professionals for consistent, season-long engine care
- • **Fuel Efficiency Maximized:** Treats up to 60 gallons per bottle for long-lasting performance

## Overview

Mercury Quickleen Engine & Fuel System Cleaner is a professional-grade additive designed to treat up to 60 gallons of fuel per 12 fl oz bottle. It aggressively removes carbon deposits from critical engine components like carburetors, injectors, intake valves, spark plugs, piston crowns, and cylinder heads. This cleaner prevents engine knocking and piston seize-up, extending spark plug life and ensuring reliable marine engine performance throughout the boating season.

## 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: Worth the price. - Honestly when you're doing marine engineering work this product is top notch. Exceeded expectations. I use this multiple times through out the year and I noticed a difference. Quality fuel system cleaner. Not cheap but works.
Review: Excellent product - Really good stuff. Notable performance improvement after using this

## Features

- Quickleen For use as needed throughout the boating season
- Aggressive cleaners work to quickly and thoroughly remove carbon deposits from carburetors and injectors, intake valves, spark plugs, piston crowns, and cylinder heads
- Prevents engine knocking and piston seize-up as well as Extends spark plug life
- Superseded From: 92-858073K01
- 1 ounce treats 5 gallons - 12 ounce bottle treats 60 gallons

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003ZF1GJQ |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #57,494 in Automotive ( See Top 100 in Automotive ) #83 in Fuel System Cleaners |
| Brand | MERCURY |
| Customer Reviews | 4.8 4.8 out of 5 stars (823) |
| Date First Available | August 12, 2010 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11.3 ounces |
| Item model number | 8M0047931 |
| Manufacturer | Mercury Marine Mercruiser |
| Manufacturer Part Number | 92-8M0047931 |
| Model | Mercury |
| OEM Part Number | 8M0047931 |
| Product Dimensions | 8 x 7 x 8 inches |
| Thread Size | RM |
| UPC | 745061870192 |
| Vehicle Service Type | Watercraft |

## Product Details

- **Automotive Fit Type:** Universal Fit
- **Brand:** MERCURY
- **Thread Size:** RM
- **UPC:** 745061870192
- **Vehicle Service Type:** Watercraft

## Images

![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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the price.
*by J***. on December 1, 2025*

Honestly when you're doing marine engineering work this product is top notch. Exceeded expectations. I use this multiple times through out the year and I noticed a difference. Quality fuel system cleaner. Not cheap but works.

### ⭐⭐⭐⭐⭐ Excellent product
*by M***K on December 31, 2025*

Really good stuff. Notable performance improvement after using this

### ⭐⭐⭐⭐⭐ Cleans well
*by R***R on November 28, 2025*

Bought more than once. Cleared sputtering and hard to start engines on power generators and lawn mowers well. Highly recommend.

## 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

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-14*