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