# 26830749 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Yellow Gear Lube Drain Screw Seal - Part Number: 26-830749

  

Genuine Quicksilver yellow drain screw seal used on Mercury, Mariner and MerCruiser gearcase drain, fill and vent screws. This earlier yellow seal reference is superseded by 26-8M0204693 and is used during gear oil service on supported Mercury / MerCruiser drives and lower units.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM yellow drain screw seal

• Correct original Mercury part number 26-830749

• Current replacement reference 26-8M0204693

• Used under gear lube drain, fill and vent screws

• Replace during every gear oil service

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 26-8M0204693 → Supersedes 26-830749

• 26-830749 earlier yellow drain screw seal reference

  

OEM / Related Numbers:

  

• 26-830749

• 830749

• 26830749

• 26-8M0204693

• 8M0204693

• 268M0204693

• Yellow drain plug washer

• Gear lube screw seal

• Drain / fill screw seal

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-24301-9

• Mallory: 9-60105

• Recmar yellow drain plug washer equivalents

• Aftermarket yellow drain screw washer kits matching 26-830749 / 26-8M0204693

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner outboard gearcase drain and vent screws

• MerCruiser stern drive drain, fill and vent screws

• Gearcase oil service using yellow Mercury plug seals

  

Typically suits:

  

• Engine / drive models:

• MerCruiser Alpha One drain / fill screw applications

• MerCruiser Alpha One Gen II drain / fill screw applications

• MerCruiser Bravo One / Two / Three drain / fill screw applications

• Mercury / Mariner outboard gearcases using yellow drain plug seal 26-830749

• Mercury EFI, FourStroke, DFI, OptiMax, Verado and Racing lower units using 26-830749 or 26-8M0204693

  

• Engine / Drive Type: Mercury / Mariner outboard and MerCruiser stern drive

• System Type: Gear lube drain / fill / vent screw seal

  

🔌 Function

  

The seal sits beneath the drain or vent screw to stop gear oil leaking out and water entering the gearcase.

  

Common signs of failure:

  

• Gear oil leak around plug

• Milky gear oil

• Seal flattened, torn or missing

• Plug removed during oil service

• Failed lower-unit pressure test

• Replacement required at each gear oil change

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 5.4 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5.40 AUD | In stock |

## Images

- 26830749 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/26830749-mercury-mercruiser-seal-genuine-quicksilver-oem-part)
> Updated: 2026-07-18