# 8M0125847 Mercury MerCruiser Fuel Cooler Kit | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Fuel Cooler Kit - Part Number: 8M0125847

  

A genuine Quicksilver fuel cooler kit for MerCruiser MPI petrol engines. This kit replaces earlier fuel cooler 861267A1 and includes the fuel cooler, drain plug with O-ring and retainer screw for service on selected 4.3L, 5.0L, 5.7L and 6.2L MerCruiser MCM and MIE MPI applications.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM fuel cooler kit

• Correct Mercury part number 8M0125847

• Supersedes 861267A1

• Includes fuel cooler, drain plug with O-ring and retainer screw

• Fits selected MerCruiser MCM / MIE 4.3L, 5.0L, 5.7L and 6.2L MPI engines where specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 8M0125847 → Supersedes 861267A1

• 861267A1 earlier OEM fuel cooler kit / cooler reference

  

OEM / Related Numbers:

  

• 8M0125847

• Mercury 8M0125847

• Quicksilver 8M0125847

• 861267A1

• Fuel cooler kit

• Cool Fuel kit

• Fuel cooler with drain plug

• 8M0125853 related fuel cooler

• 25-8M0204683 related O-ring used in supported fuel cooler service family

• 25-805062 related O-ring

• 25-805531 related O-ring

• 861155A3 related fuel boost pump assembly

• 861126A1 related fuel regulator kit

  

Aftermarket / Verified Equivalents:

  

• Aftermarket fuel cooler kit replacements are available where matched directly to 8M0125847 / 861267A1 and the exact engine serial number

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser MCM MPI fuel cooling systems

• MerCruiser MIE MPI fuel cooling systems

• Cool Fuel / fuel cooler assemblies on small-block V6 and V8 petrol engines

  

Typically suits:

  

• Engine models:

• MerCruiser 4.3L MPI Alpha / Bravo - serial 0M300000 and up where 8M0125847 is specified

• MerCruiser 5.0L MPI Alpha / Bravo - serial 0M300000 and up where specified

• MerCruiser 5.7L MPI Alpha / Bravo - serial 0M300000 and up where specified

• MerCruiser 350 MAG MPI Alpha / Bravo - serial 0M300000 and up where specified

• MerCruiser 350 MAG MPI Horizon Alpha / Bravo - serial 0M300000 and up where specified

• MerCruiser MX 6.2L MPI Bravo - serial 0M300000 and up where specified

• MerCruiser MX 6.2L MPI Horizon Bravo - serial 0M300000 and up where specified

• MerCruiser 5.7L MPI MIE - serial 0M317000 and up where specified

• MerCruiser 5.7L MPI Horizon MIE - serial 0M317000 and up where specified

• MerCruiser 6.2L MPI MIE - serial 0M317000 and up where specified

• MerCruiser 6.2L MPI Horizon MIE - serial 0M317000 and up where specified

• MerCruiser Black Scorpion 350 MPI applications where fuel cooler kit 8M0125847 is specified

• MerCruiser Scorpion 350 / 377 applications where fuel cooler kit 8M0125847 is specified

  

• Engine Type: MerCruiser MPI petrol sterndrive and inboard

• Engine Range: commonly 4.3L, 5.0L, 5.7L and 6.2L where specified

• System Type: Fuel cooler / Cool Fuel service kit

  

🔌 Function

  

The fuel cooler reduces fuel temperature before delivery to the fuel rail, helping maintain stable fuel pressure and reducing vapor lock risk in enclosed marine engine compartments.

  

Common signs of failure:

  

• Fuel leakage from cooler body or drain plug

• Hard starting when hot

• Fuel pressure instability

• Corrosion inside cooler body

• Water or fuel contamination around cooler

• Cooler removed during fuel-system service and seals require replacement

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 604.2 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 604.20 AUD | In stock |

## Images

- 8M0125847 Mercury MerCruiser Fuel Cooler Kit | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/8m0125847-mercury-mercruiser-fuel-cooler-kit-genuine-quicksilver-oem-part)
> Updated: 2026-07-18