# 2597387 Mercury MerCruiser O-Ring | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Bravo Upper Gear Housing O-Ring - Part Number: 25-97387

  

Genuine Quicksilver O-ring used in MerCruiser Bravo upper gear housing and U-joint seal retainer assemblies. This seal is commonly serviced alongside 25-861844 / 25-8M0214974 and Bravo upper oil seals during drive reseal work.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM O-ring

• Correct Mercury part number 25-97387

• Used in Bravo upper gear housing sealing applications

• Commonly used around U-joint seal retainer / upper gear housing areas

• Required during Bravo upper drive reseal work

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 25-97387 current OEM O-ring reference

  

OEM / Related Numbers:

  

• 25-97387

• 97387

• 2597387

• Bravo upper gear housing O-ring

• U-joint seal retainer O-ring

• 25-861844 related retainer O-ring

• 25-8M0214974 current related retainer O-ring

• 26-127091 related upper oil seal

• 26-807006 related upper oil seal

• 24-17997A1 related gear lube check valve spring kit

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-7167 / 18-7961 application family where matched to the Bravo retainer location

• Mallory: 9-76569 application family where matched

• SEI: 95-205-04 related Bravo O-ring service family

• Recmar equivalent Bravo upper O-ring service parts where matched by diagram

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser Bravo upper gear housing assemblies

• Bravo U-joint seal retainer service

• Bravo One, Bravo Two and Bravo Three upper drive reseal applications

  

Typically suits:

  

• Drive models:

• MerCruiser Bravo Drives - serial 0B664190 to 0F729999

• MerCruiser Bravo Sterndrives - serial 0F730000 to 0M100000

• MerCruiser Bravo - serial 0M100001 to 0W249999

• MerCruiser Bravo One - serial 0W250000 and up

• MerCruiser Bravo Two - serial 0B664190 and up

• MerCruiser Bravo Three - serial 0B664190 and up

• MerCruiser Bravo X One / Two / Three where upper gear housing O-ring 25-97387 is specified

• MerCruiser Bravo XR / XZ upper drive applications where specified

  

• Drive Type: MerCruiser Bravo stern drive

• System Type: Upper gear housing / U-joint seal retainer O-ring

  

🔌 Function

  

The O-ring seals the upper housing or retainer joint to prevent drive oil leakage and water intrusion.

  

Common signs of failure:

  

• Gear oil seepage from upper housing area

• Water contamination in drive oil

• O-ring cut or flattened during service

• Failed Bravo pressure or vacuum test

• Corrosion around retainer groove

• Replacement required whenever the retainer is removed

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 23.55 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 23.55 AUD | In stock |

## Images

- 2597387 Mercury MerCruiser O-Ring | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/2597387-mercury-mercruiser-o-ring-genuine-quicksilver-oem-part)
> Updated: 2026-07-18