Sierra International 18-9858 Bearing Carrier Retainer Wrench Sierra Bearing Carrier Retainer Wrench Removes and installs bearing carrier retainer nuts Sierra part number: 18-9858 Interchangeable with the following: GLM 90190, Mercury 91-61069T Compatible Drive Units and Outboards: Bravo One/Two, MC-I, R-MR, Alpha One, Alpha One/Gen II, and TRS