3135988A12 Mercury MerCruiser Bearing | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Roller Bearing Assembly - Part Number: 31-35988A12

A genuine Quicksilver roller bearing assembly used in MerCruiser R / MR / Alpha One and Alpha One Gen II sterndrive applications. This bearing assembly supersedes earlier 31-35988A2 and is used in selected transom assembly and sterndrive bearing locations.

⚙️ Key Features

• Genuine Quicksilver OEM bearing assembly

• Correct Mercury part number 31-35988A12

• Supersedes 31-35988A2

• Used on MerCruiser R / MR / Alpha One and Alpha One Gen II applications

• Drive / transom bearing assembly for specified MerCruiser sterndrive diagrams

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 31-35988A12 → Supersedes 31-35988A2

• 31-35988A2 earlier OEM bearing assembly reference

OEM / Related Numbers:

• 31-35988A12

• 35988A12

• 3135988A12

• 31-35988A2

• 35988A2

Aftermarket / Verified Equivalents:

• No direct aftermarket equivalent confirmed for all OEM applications

🚤 Compatibility

Commonly used on:

• MerCruiser R / MR / Alpha One sterndrive applications

• MerCruiser Alpha One Gen II sterndrive and transom assembly applications

Typically suits:

• Drive / transom models:

• MerCruiser R / MR / Alpha One transom assembly - 1983-1990

• MerCruiser R / MR / Alpha One sterndrive - 1983-1990

• MerCruiser Alpha One Gen II sterndrive and transom assembly - 1991-1995

• MerCruiser Alpha One Gen II sterndrive and transom assembly - 1996-1997

• MerCruiser Alpha One Gen II bearing assembly applications where 31-35988A12 is specified

• Drive Type: MerCruiser R / MR / Alpha One / Alpha One Gen II

• System Type: Roller bearing assembly / sterndrive or transom assembly bearing location

🔌 Function

The bearing assembly supports rotating drive components and helps maintain shaft alignment within the specified MerCruiser sterndrive or transom assembly.

Common signs of failure:

• Bearing noise from drive assembly

• Rough rotation during inspection

• Metal particles in lubricant

• Excessive shaft movement

• Bearing replacement required during drive rebuild

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging