# 816431A1 Mercury MerCruiser Bellows Assembly | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver U-Joint Bellows Assembly - Part Number: 816431A1

  

A genuine Quicksilver universal joint bellows assembly for MerCruiser Alpha One Gen II sterndrives. This bellows seals the driveshaft / universal joint area between the bell housing and gimbal housing, helping prevent water from entering the transom assembly and damaging the gimbal bearing, universal joints and driveshaft components.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM U-joint bellows assembly

• Correct Mercury part number 816431A1

• Designed for MerCruiser Alpha One Gen II sterndrives

• Includes bellows, sleeve and clamps where supplied in the assembly

• Critical sealing component for the driveshaft and gimbal bearing area

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 816431A1 current OEM service reference

• 816431 A1 related OEM formatted reference

  

OEM / Related Numbers:

  

• 816431A1

• 816431 A1

• 816431

• 816607 related bellows sleeve

• 91-818162 related bellows installation tool

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-2750

• GLM: 89140

• Mallory: 9-72706

• Recmar: REC816431A1

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser Alpha One Gen II sterndrive U-joint bellows applications

  

Typically suits:

  

• Drive models:

• MerCruiser Alpha One Gen II sterndrive - serial 0D469859 and up

• MerCruiser Alpha One Gen II transom assembly - 1991 and newer

• MerCruiser Alpha One Gen II 3.0L sterndrive / transom applications where 816431A1 is specified

• MerCruiser Alpha One Gen II 4.3L V6 sterndrive / transom applications where 816431A1 is specified

• MerCruiser Alpha One Gen II 5.0L V8 sterndrive / transom applications where 816431A1 is specified

• MerCruiser Alpha One Gen II 5.7L V8 sterndrive / transom applications where 816431A1 is specified

• MerCruiser Alpha One Gen II bell housing and gimbal housing applications using the Gen II U-joint bellows sleeve design

  

• Drive Type: MerCruiser Alpha One Gen II

• Year Range: 1991 and newer

• System Type: U-joint bellows / transom assembly seal

  

🔌 Function

  

The U-joint bellows seals the driveshaft and universal joint cavity, keeping water out of the gimbal bearing and drive coupling area.

  

Common signs of failure:

  

• Water entering the bilge through the transom assembly

• Cracked, split or perished bellows

• Water-damaged gimbal bearing

• Rust on universal joints or driveshaft components

• Growling or rumbling noise from the gimbal bearing area

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 220.85 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 220.85 AUD | In stock |

## Images

- 816431A1 Mercury MerCruiser Bellows Assembly | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/816431a1-mercury-mercruiser-bellows-assembly-genuine-quicksilver-oem-part)
> Updated: 2026-05-17