31861792 Mercury MerCruiser Thrust Bearing | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Bravo Driven Gear Bearing Assembly - Part Number: 31-861792

A genuine Quicksilver driven gear bearing assembly used in MerCruiser Bravo sterndrive drive shaft housing applications. This bearing supports rotating gear components in Bravo I, Bravo II, Bravo III, Bravo X, Bravo XR and Bravo XZ stern drives where 31-861792 is specified.

⚙️ Key Features

• Genuine Quicksilver OEM bearing assembly

• Correct Mercury part number 31-861792

• Driven gear / thrust bearing application

• Used on Bravo I, II, III, X, XR and XZ drive systems

• Complete bearing assembly ready for installation during drive service

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 31-861792 current OEM driven gear bearing assembly reference

OEM / Related Numbers:

• 31-861792

• 861792

• 31861792

• 31-861791 related race

• 31-861787 related driven gear / thrust bearing

• 31-8M0104358 related Bravo bearing assembly

Aftermarket / Verified Equivalents:

• No direct aftermarket equivalent preferred over OEM for Bravo drive bearing service

🚤 Compatibility

Commonly used on:

• MerCruiser Bravo driven gear and drive shaft housing bearing applications

Typically suits:

• Drive models:

• MerCruiser Bravo One - serial 0M100001 to 0W249999

• MerCruiser Bravo One - serial 0W250000 and up

• MerCruiser Bravo Two - serial 0M100001 to 0W249999

• MerCruiser Bravo Two - serial 0W250000 and up

• MerCruiser Bravo Three - serial 0M100001 to 0W249999

• MerCruiser Bravo Three - serial 0W250000 and up

• MerCruiser Bravo X One - serial 0M100001 to 0W249999

• MerCruiser Bravo X One - serial 0W250000 and up

• MerCruiser Bravo X Two - serial 0M100001 to 0W249999

• MerCruiser Bravo X Two - serial 0W250000 and up

• MerCruiser Bravo X Three - serial 0M100001 to 0W249999

• MerCruiser Bravo X Three - serial 0W250000 and up

• MerCruiser Bravo XR sterndrive applications where 31-861792 is specified

• MerCruiser Bravo XZ sterndrive applications where 31-861792 is specified

• MerCruiser 4.6L V8 4-stroke Bravo-related drive applications where 31-861792 is specified in the drive assembly

• Drive Type: MerCruiser Bravo I / II / III / X / XR / XZ

• Serial Range: commonly 0M100001 and up where specified

• System Type: Driven gear / drive shaft housing bearing assembly

🔌 Function

The bearing assembly supports the driven gear and related rotating components, helping maintain correct gear mesh, bearing preload and smooth drive operation.

Common signs of failure:

• Upper drive bearing noise

• Gear oil contaminated with metal particles

• Excessive end play or gear movement

• Vibration under acceleration

• Bearing replacement required during upper drive rebuild

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging