MerCruiser Alpha One Lower Unit Counter Rotation Gearcase 3.0L 4.1L 5.0L 5.7L Gen I 1983-1990
Item Details
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This is a counter rotating unit. Usually only found on boats with twin engines. Impeller will need to be inspected. Will come with an impeller kit.
- Compatible with all upper alpha one Units (MC-1/R/MR/Gen 1) from 1970-1990 (the case style is 1983-1990) Regardless of engine (120hp 2.5L 140hp 3.0L 165hp 170hp 305 350 470 2.5L 3.0L 4.3L V6 5.0L 305 5.7L 350 V8 etc)
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Shifts and functions as it should.
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All shafts are pretty clean and not rusted up.
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No leaks or bad seals found after pressure testing.
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Gear oil will be drained before shipping.
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No Cracks or Welds
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Purchase with confidence!
