Sierra Gimbal Bearing - SIE-18-21005

Sierra 18-21005 MerCruiser Alpha One Gen II & Bravo Gimbal Bearing

Sierra high-quality gimbal bearings are greasable and fit all Bravo, and Alpha One Gen II (1998 & up).

Interchangeable With:

Mallory

9-72412

MerCruiser Stern Drive

30-862540A3

30-879194A01

30-862540T1

30-862540A04

Frequently Asked Questions

• What is the Sierra 18-21005 MerCruiser Alpha One Gen II & Bravo Gimbal Bearing used for? The Sierra 18-21005 MerCruiser Alpha One Gen II & Bravo Gimbal Bearing is a replacement gimbal bearing designed for Bravo and Alpha One Gen II sterndrive applications. The bearing is greasable and fits Alpha One Gen II applications from 1998 and up.
• Which MerCruiser sterndrives does the Sierra 18-21005 Gimbal Bearing fit? The Sierra 18-21005 fits all Bravo applications and Alpha One Gen II applications from 1998 and up. Verify your sterndrive type and model year before purchasing to confirm the bearing is appropriate for your application.
• Is the Sierra 18-21005 Gimbal Bearing greasable? Yes. Sierra identifies the 18-21005 gimbal bearing as greasable. The product description does not provide specific greasing instructions, so follow the applicable equipment owner's manual or product instructions for proper servicing.
• What part numbers are interchangeable with the Sierra 18-21005 Gimbal Bearing? The Sierra 18-21005 is listed as interchangeable with Mallory 9-72412 and MerCruiser Stern Drive part numbers 30-862540A3, 30-879194A01, 30-862540T1, and 30-862540A04. Verify the applicable part number for your sterndrive before ordering.