# 26413651 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Lower Gearcase Oil Seal - Part Number: 26-41365-1

  

A genuine Quicksilver oil seal used in Mercury / Mariner small outboard lower gearcase assemblies. This seal is commonly used on 6HP, 8HP, 9.9HP, 13.5HP and 15HP small outboards where the gear housing / driveshaft diagram specifies 26-41365-1.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM oil seal

• Correct Mercury part number 26-41365-1

• Lower gearcase oil seal application

• Used on Mercury / Mariner small outboard gear housings

• Cross-references with Sierra, SEI and GLM oil seal references

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 26-41365-1 current OEM service reference

• 26-41365 earlier formatted seal reference

  

OEM / Related Numbers:

  

• 26-41365-1

• 26-413651

• 413651

• 26413651

• 26-41365

• 41365

• Mercury 26-41365-1

• Quicksilver 26-41365-1

• Lower gearcase oil seal reference

• 47-3753 related water pump impeller reference in small gear housing assemblies

• 12-16448 related gasket reference

• 19-643 related plug / seal family reference in small outboard lower unit service

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-0581

• SEI Marine: 94-261-01

• GLM: 85570

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner 6HP to 15HP small outboard lower gearcase assemblies

• Mercury / Mariner 8HP, 9.9HP and 15HP 323cc 4-stroke lower gearcase assemblies

• Mercury / Mariner 10HP SeaPro / Marathon / Viking lower gearcase applications

• Gear housing driveshaft seal service where 26-41365-1 is specified

  

Typically suits:

  

• Engine models:

• Mercury 6HP 2-stroke gear housing applications where 26-41365-1 is specified

• Mercury 6HP / 8HP / Sailmate 9.9HP / Sailpower 15HP gear housing applications

• Mercury 8HP 2-stroke gear housing applications where 26-41365-1 is specified

• Mercury 8HP Bodensee 4-stroke International gear housing applications

• Mercury 9.9HP 2-stroke gear housing applications where 26-41365-1 is specified

• Mercury 9.9HP 4-stroke 323cc gear housing applications

• Mercury 10HP SeaPro gear housing applications where 26-41365-1 is specified

• Mercury 10HP Marathon gear housing applications where 26-41365-1 is specified

• Mercury 10HP Viking gear housing applications where 26-41365-1 is specified

• Mercury 13.5HP 4-stroke International gear housing applications

• Mercury 15HP 2-stroke gear housing applications where 26-41365-1 is specified

• Mercury 15HP SeaPro gear housing applications where 26-41365-1 is specified

• Mercury 15HP Marathon gear housing applications where 26-41365-1 is specified

• Mercury 15HP 4-stroke 323cc gear housing applications

• Mercury XR10 gear housing applications where 26-41365-1 is specified

• Mercury 10 Magnum gear housing applications where 26-41365-1 is specified

• Mariner 6HP, 8HP, 9.9HP, 10HP, 13.5HP and 15HP small outboard lower gearcase applications where 26-41365-1 is specified

• Sears 9.9HP and 15HP Mercury-built outboard lower gearcase applications where 26-41365-1 is specified

  

• HP Range: commonly 6HP - 15HP where specified

• Engine Type: Mercury / Mariner small outboard, 2-stroke and 323cc 4-stroke

• System Type: Lower gearcase oil seal

  

🔌 Function

  

The oil seal seals the lower gearcase around the specified shaft area, helping retain gear oil and prevent water from entering the lower unit.

  

Common signs of failure:

  

• Milky or water-contaminated gear oil

• Gear oil leaking from lower gearcase

• Failed lower-unit pressure or vacuum test

• Seal hardened, worn or damaged during service

• Replacement required during gearcase reseal or water pump service

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 15.0 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.00 AUD | In stock |

## Images

- 26413651 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/26413651-mercury-mercruiser-seal-genuine-quicksilver-oem-part)
> Updated: 2026-07-18