MerCruiser Alpha One Lower Unit Gearcase 3.0L 4.1L 5.0L 5.7L Pre-Alpha 1970-1982 Trim Parts For the most part it

For the most part it seems these parts were used from 1983-1989 on "470" models that used a 4" Heat exchanger ****(not the smaller 3" model)****

These aren't seized or anything

Obvious surface rust

F6637561 Packing / rubber trim rim seal still installed

but it should still be completely usable

MerCruiser Alpha One Lower Unit Gearcase 3.0L 4.1L 5.0L 5.7L Pre-Alpha 1970-1982 Trim Parts For the most part itItem Details Compatible with all upper alpha one Units (MC 1 R MR Gen 1) from 1970 1991 (the case style is 1970 1982) 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) Shift shaft in great shape All shafts are pretty clean and not rusted up. No leaks or bad seals found after pressure testing. Gear oil will be drained before shipping. No Cracks or Welds Purchase with confidence!