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Gimbal Bearing Mercruiser Stern Drive, 18-21001 Sierra
Gimbal Bearing for Mercruiser Stern Drives on boats with MC-1, R, MR drives, Alpha I (1974-97), Gen II (1991-97), and Bravo I, II, III (1988-95). Replaces Mercruiser Stern Drive part numbers:30-879194A02. 30-60794A4. 30-60794B4. 30-60794A2.