# 65533A1 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Transom / Gimbal Housing Seal - Part Number: 65533A1

  

Genuine Quicksilver/MerCruiser transom seal for compatible MerCruiser MC-I, R, MR and Alpha One Gen I stern drive transom assemblies. This OEM seal is used at the gimbal housing / transom area to help maintain correct sealing and reduce the risk of water intrusion.

  

⚙️ Key Features

  

• Genuine Quicksilver/MerCruiser OEM transom seal

• Designed for compatible MerCruiser MC-I, R, MR and Alpha One Gen I transom assemblies

• Helps seal the gimbal housing / transom area

• Direct replacement where 65533A1 is specified

• Important service item during transom assembly or gimbal housing work

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 65533A1

• 65533

  

OEM / Related Numbers:

  

• 65533A1

• 65533

• 25-65533 related seal reference where listed by application

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-2619

• GLM: 86950

• REC: REC65533A1

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser MC-I transom assemblies

• MerCruiser R and MR transom assemblies

• MerCruiser Alpha One Gen I gimbal housing / transom sealing applications

  

Typically suits:

  

• Engine models:

• MerCruiser MC-I stern drive transom assemblies

• MerCruiser R stern drive transom assemblies

• MerCruiser MR stern drive transom assemblies

• MerCruiser Alpha One Gen I stern drive transom assemblies

• MerCruiser Alpha One Gen I / R / MR applications, approximately 1972-1990

• MerCruiser stern drive packages using the matching gimbal housing transom seal 65533A1

  

• HP Range: Not applicable - transom / gimbal housing sealing component

• Engine Type: MerCruiser stern drive transom assembly / gimbal housing seal system

• Year Range: Approximately 1972-1990 for compatible MC-I, R, MR and Alpha One Gen I style applications, depending on drive and transom assembly

  

🔌 Function

  

The transom seal helps seal the gimbal housing against the transom assembly. A correct seal helps prevent water intrusion into the boat and supports proper stern drive installation integrity.

  

Common signs of failure:

  

• Water leaking into the bilge around the transom assembly

• Seal cracked, flattened or deteriorated

• Corrosion around gimbal housing mounting area

• Water intrusion after drive or transom service

• Seal damage during gimbal housing removal

• Poor sealing after reinstallation

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 50.25 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 50.25 AUD | In stock |

## Images

- 65533A1 Mercury MerCruiser Seal | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/65533a1-mercury-mercruiser-seal-genuine-quicksilver-oem-part)
> Updated: 2026-05-17