# 26-8M0204708 Mercury MerCruiser Oil Seal | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Shift Shaft Oil Seal - Part Number: 26-8M0204708

  

A genuine Quicksilver lower-unit shift-shaft oil seal for selected Mercury and Mariner outboards and MerCruiser Vazer drive assemblies.

  

The seal fits around the shift shaft in the gear housing or bell-housing assembly. It retains gear lubricant inside the housing while preventing cooling water and external contamination from entering around the shift shaft.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM shift-shaft oil seal

• Correct current Mercury part number 26-8M0204708

• Supersedes earlier seal 26-8164641

• Double-purpose gear-lubricant retention and water-exclusion seal

• Cross-references with Sierra, GLM, Mallory, Recmar and Honda numbers

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 26-8M0204708 → Supersedes 26-8164641

• 26-8164641 → Related to earlier 816464 seal reference

• 816464 earlier OEM base reference

  

OEM / Related Numbers:

  

• 26-8M0204708

• 8M0204708

• 268M0204708

• 26-8164641

• 8164641

• 816464

• 76384

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-2054

• GLM: 85581

• Mallory: 9-76116

• Recmar: REC26-8164641

• Honda Marine: 91253-ZW1-003

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury and Mariner outboard shift-shaft sealing assemblies

• Lower gear housings using the 816464-series shift-shaft seal

• MerCruiser Vazer bell-housing and shift-shaft applications

  

Typically suits:

  

• Engine models:

• Mercury / Mariner 35HP 2-stroke

• Mercury / Mariner 40HP 2-cylinder, 3-cylinder and 4-cylinder

• Mercury / Mariner 45HP 2-stroke

• Mercury / Mariner 50HP carburetted and EFI

• Mercury / Mariner 55HP and 55 SeaPro

• Mercury / Mariner 60HP carburetted, EFI and four-stroke

• Mercury / Mariner 65HP 3-cylinder

• Mercury / Mariner 70HP 3-cylinder

• Mercury / Mariner 75HP 2-stroke, four-stroke and DFI

• Mercury 80 Jet

• Mercury / Mariner 90HP 2-stroke, four-stroke and DFI

• Mercury / Mariner 100HP EFI and 2-stroke

• Mercury / Mariner 115HP 2-stroke, EFI and four-stroke

• Mercury 120 Force-based applications using the corresponding gear housing

• Mercury / Mariner 125HP 2-stroke

• Mercury V135, V150, V175 and V200 2.0L / 2.5L applications using the corresponding shift-shaft housing

• Mercury XR4, Laser and Magnum II gearcase applications

• MerCruiser Vazer drive shift-shaft seal applications

  

• HP Range: 35HP - 200HP

• Engine Type: Mercury / Mariner 2-stroke, four-stroke, EFI and DFI outboard; MerCruiser Vazer

• Year Range: Approximately mid-1980s through the 2010s, dependent on gearcase and serial number

  

🔌 Function

  

The oil seal closes the clearance around the lower-unit shift shaft. It prevents gear lubricant leaking out and blocks water from entering the gear housing during operation.

  

Common signs of failure:

  

• Gear lubricant leaking around the shift shaft

• Milky or water-contaminated gear oil

• Gearcase fails pressure or vacuum testing

• Corrosion around the shift-shaft bore

• Gear-lubricant level falling without visible propeller-shaft leakage

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 22.95 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 22.95 AUD | In stock |

## Images

- 26-8M0204708 Mercury MerCruiser Oil Seal | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/26-8m0204708-mercury-mercruiser-oil-seal-genuine-quicksilver-oem-part)
> Updated: 2026-07-18