# 90196 Mercury MerCruiser 25 90196 8M0204673 25 8M024673 O Ring .921 x .139 | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Oil Fill O-Ring .921 x .139 - Part Number: 25-8M0204673

  

A genuine Quicksilver O-ring used on Mercury / Mariner oil fill and cap sealing applications. This .921" x .139" O-ring is the current replacement for earlier 25-90196 and is used where the oil fill cap or related service diagram specifies 25-8M0204673.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM O-ring

• Correct current Mercury part number 25-8M0204673

• Supersedes 25-90196

• Size: .921" x .139" / .921" x .140" listing reference

• Commonly used as an oil fill cap / oil fill plug O-ring where specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 25-8M0204673 → Supersedes 25-90196

• 25-90196 earlier OEM O-ring reference

  

OEM / Related Numbers:

  

• 25-8M0204673

• 8M0204673

• 258M0204673

• 25-90196

• 90196

• 25-8M024673 listing typo / shortened reference

• O-ring .921 x .139

• O-ring .921 x .140

• Oil fill O-ring

• Oil fill cap O-ring

  

Aftermarket / Verified Equivalents:

  

• Aftermarket O-ring equivalents are available where matched by exact size and material to 25-8M0204673 / 25-90196

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner oil fill cap sealing applications

• Mercury FourStroke outboard oil fill plug / cap locations

• Mercury / MerCruiser assemblies where O-ring 25-90196 / 25-8M0204673 is specified

  

Typically suits:

  

• Engine models:

• Mercury FourStroke outboard oil fill applications where 25-8M0204673 is specified

• Mercury 25HP FourStroke oil fill cap applications where specified

• Mercury 30HP FourStroke oil fill cap applications where specified

• Mercury 40HP FourStroke oil fill cap applications where specified

• Mercury 50HP FourStroke oil fill cap applications where specified

• Mercury 60HP FourStroke oil fill cap applications where specified

• Mercury 75HP FourStroke oil fill cap applications where specified

• Mercury 90HP FourStroke oil fill cap applications where specified

• Mercury 115HP FourStroke oil fill cap applications where specified

• Mercury 150HP FourStroke oil fill cap applications where specified

• Mercury EFI FourStroke oil fill assemblies using O-ring 25-90196 / 25-8M0204673

• Mercury / Mariner service diagrams specifying .921" x .139" O-ring 25-8M0204673

  

• Engine Type: Mercury / Mariner FourStroke and selected Mercury / MerCruiser assemblies where specified

• System Type: Oil fill cap / plug O-ring

• O-Ring Size: .921" x .139"

  

🔌 Function

  

The O-ring seals the oil fill cap or plug to prevent oil leakage, vapour escape and contamination entry at the oil fill opening.

  

Common signs of failure:

  

• Oil residue around oil fill cap

• O-ring flattened, swollen or cracked

• Cap not sealing after oil service

• O-ring missing after removal

• Dirt or moisture risk at oil fill opening

• Replacement required whenever the cap seal is damaged

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 6.98 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6.98 AUD | In stock |

## Images

- 90196 Mercury MerCruiser 25 90196 8M0204673 25 8M024673 O Ring .921 x .139 | Genuine Quicksilver OEM Part
- 90196 Mercury MerCruiser 25 90196 8M0204673 25 8M024673 O Ring .921 x .139 | Genuine Quicksilver OEM Part
- 90196 Mercury MerCruiser 25 90196 8M0204673 25 8M024673 O Ring .921 x .139 | Genuine Quicksilver OEM Part
- 90196 Mercury MerCruiser 25 90196 8M0204673 25 8M024673 O Ring .921 x .139 | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/90196-mercury-mercruiser-25-90196-8m0204673-25-8m024673-o-ring-921-x-139-genuine-quicksilver-oem-part)
> Updated: 2026-07-18