# 2770937 Mercury MerCruiser 8M0214941 O Ring | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Alpha Input Shaft O-Ring - Part Number: 25-8M0214941

  

A genuine Quicksilver O-ring used on MerCruiser Alpha / Alpha One input shaft and sterndrive sealing applications. This O-ring replaces the earlier 25-70937 reference and is commonly used on MerCruiser stern drive input shaft / drive installation sealing locations.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM O-ring

• Correct current Mercury part number 25-8M0214941

• Supersedes earlier 25-70937 O-ring reference

• Used on Alpha input shaft and drive sealing applications

• Important replacement seal during drive removal, installation or input shaft service

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 25-8M0214941 → Supersedes 25-70937

• 25-70937 earlier OEM O-ring reference

• 70937 original related O-ring reference

  

OEM / Related Numbers:

  

• 25-8M0214941

• 8M0214941

• 25-70937

• 70937

• 2770937

• 16755Q1 related O-ring kit reference

• 30-879194A01 related gimbal bearing kit reference

• 30-879194A02 related gimbal bearing reference

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser Alpha input shaft O-ring applications

• MerCruiser stern drive installation and input shaft sealing locations

  

Typically suits:

  

• Drive / engine models:

• MerCruiser 225-S - 1974, serial 3856268 to 4200499

• MerCruiser 233 - 1975-1977, serial 4200500 and up

• MerCruiser 470 - 1976-1977, serial 4208730 to 4893934

• MerCruiser 120 / 140 - 1978-1982, serial 4893635 to 6225576

• MerCruiser 165 - 1978-1981, serial 4890460 and up

• MerCruiser 898 - 1978-1982, serial 4898730 to 6225576

• MerCruiser 260 - 1978-1982, serial 4898730 to 6225576

• MerCruiser 470 - 1978-1982, serial 4893835 to 6225576

• MerCruiser 485 - 1980-1982, serial 4893835 and up

• MerCruiser 228 - 1978-1982, serial 4898730 to 6225576

• MerCruiser Alpha One Gen II - 1991 and newer input shaft O-ring applications where 25-8M0214941 is specified

• MerCruiser Alpha / Alpha One drive input shaft sealing applications where 25-70937 / 25-8M0214941 is shown in the drive installation or input shaft diagram

  

• Drive Type: MerCruiser Alpha / Alpha One / Alpha One Gen II and earlier MerCruiser stern drive applications where specified

• System Type: Input shaft O-ring / drive sealing component

• Fitment Note: This O-ring is matched by drive and input shaft diagram location rather than engine displacement alone.

  

🔌 Function

  

The O-ring seals the specified input shaft or drive installation joint, helping prevent water entry, lubricant leakage or sealing failure around the drive interface.

  

Common signs of failure:

  

• Water intrusion after drive installation

• O-ring flattened, cut or missing

• Leakage around input shaft sealing area

• O-ring damage during drive removal

• Replacement required during gimbal bearing, bellows or drive service

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 9.1 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 9.10 AUD | In stock |

## Images

- 2770937 Mercury MerCruiser 8M0214941 O Ring | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/2770937-mercury-mercruiser-8m0214941-o-ring-genuine-quicksilver-oem-part)
> Updated: 2026-05-17