# 26863151 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Fuel Cooler Quad Ring Seal - Part Number: 26-8M0214975

  

Genuine Quicksilver quad ring seal used in MerCruiser fuel cooler / Cool Fuel assemblies. This current seal supersedes earlier 26-863151 and is used on selected MerCruiser MPI small-block and high-performance engines where the fuel cooler diagram specifies this quad ring seal.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM quad ring seal

• Correct current Mercury part number 26-8M0214975

• Supersedes 26-863151

• Used in MerCruiser fuel cooler / Cool Fuel assemblies

• Critical seal for fuel cooler service and leak prevention

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 26-8M0214975 → Supersedes 26-863151

• 26-863151 earlier OEM quad ring seal reference

  

OEM / Related Numbers:

  

• 26-8M0214975

• 8M0214975

• 26-863151

• 863151

• 26863151

• Fuel cooler quad ring

• Cool Fuel quad ring seal

• 8M0125847 related fuel cooler kit

• 8M0125853 related fuel cooler

  

Aftermarket / Verified Equivalents:

  

• Aftermarket fuel cooler quad ring seals are available by direct 26-863151 / 26-8M0214975 match

• Use fuel-compatible quad ring seal only

• Avoid generic O-ring substitution unless material, section and profile match the Cool Fuel assembly

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser Cool Fuel assemblies

• MerCruiser MPI fuel cooler service

• Small-block MPI and Horizon MIE fuel systems

• Selected high-performance MerCruiser SCi fuel cooling applications

  

Typically suits:

  

• Engine models:

• MerCruiser 350 MAG MPI MIE - serial 0L302200 to 0M299999

• MerCruiser 350 MAG MPI Horizon MIE - serial 0L302200 to 0M299999

• MerCruiser 6.2L MPI MIE - serial 0L302200 to 0M299999

• MerCruiser 350 MAG MPI Alpha / Bravo - serial 0L331599 to 0M299999

• MerCruiser 350 MAG MPI Ski Gen+ GM 350 V8 - serial 0L002600 to 0M310009

• MerCruiser Scorpion 350 - serial 0W698433 and up

• MerCruiser Scorpion 377 - serial 0W698433 and up

• MerCruiser 850 SCi - serial 0M957579 to 0M962885

• MerCruiser 850 SCi - serial 0M962886 and up

• MerCruiser 1025 SCi - serial 0M962886 and up

• MerCruiser 1075 SCi - serial 0M962886 and up

• MerCruiser 1200 SCi - serial 0M962886 and up

  

• Engine Type: MerCruiser MPI petrol and high-performance SCi engines where specified

• System Type: Fuel cooler / Cool Fuel quad ring seal

  

🔌 Function

  

The quad ring seals the fuel cooler joint, helping prevent fuel leakage and maintaining correct fuel system sealing.

  

Common signs of failure:

  

• Fuel smell or seepage around cooler

• Fuel cooler opened and seal disturbed

• Seal flattened, swollen or cut

• Fuel pressure instability after service

• Corrosion around cooler joint

• Replacement required during Cool Fuel rebuild

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 3.95 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.95 AUD | In stock |

## Images

- 26863151 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/26863151-mercury-mercruiser-seal-genuine-quicksilver-oem-part)
> Updated: 2026-07-18