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Boat mechanics and DIYers!

Here's a Sierra bearing top cover for Mercruiser drives.

Fits MC I, R/MR, and Alpha I Gen II with the 1.9 setup.

Part number 31-61100A1, also crosses with 21510.

Brand new in the original packaging (the good stuff!).

Sierra's known for solid marine parts, so this should keep your outdrive happy.
NIB - ready to install and get back on the water.

4 out of 5