Part Number: GLM12930
Price: $5.9500
Spring Kit Oil Reservoir for Mercruiser Alpha Gen 2 Bravo 24-17997A1
Spring Ball and Seal Kit for Mercruiser Alpha One Gen. II and Bravo.

These drives came with an oil reservoir system. This is the check ball that keeps the oil from leaking while the drive is removed.

Goes in the upper unit between the two top right (starboard) mounting holes.

OEM: 24-17997A1