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

Replace a worn or noisy gimbal bearing on a MerCruiser Alpha One Gen II (1998 and newer) or any Bravo sterndrive. The Sierra 18-21005 meets or exceeds the original MerCruiser bearing and supports the drive shaft and U-joint where they pass through the bell housing.

Reference part numbers: 30-862540A3, 30-862540A04, 30-862540T1, 30-879194A01, 9-72412

Fits These Motors

• MerCruiser Alpha One Gen II (1998 and newer)
• All MerCruiser Bravo drives

Works With

• Gimbal Bearing Puller (AMT0040) — removes the old bearing
• Gimbal Bearing Alignment and Install Kit (K1008) — installs the new one and checks alignment