Mercruiser Sterndrive Units
- R
- MR
- Alpha One
- Alpha One SS
- Number 6
- MC 120R/140B/185R/488R/898R/228R/260R 6216687 to 6849289
- MC 120MR/140MR/170MR/185MR/190MR/200MR/230MR/260MR/300 Tempest MR 6849290 to 0A471374
- MC Alpha One/Alpha One SS 0A471375 and Above
- R and MR (Serial numbers: 2763442 - 6225576)
- Alpha One (Serial numbers: 0A502811 - 0D469858)
- Alpha One Gen II (Serial numbers: 0D469859 and up)
Serial Numbers:
- R and MR: 2763442 - 6225576
- Alpha One: 0A502811 - 0D469858
- Alpha One Gen II: 0D469859 and up
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