MerCruiser Alpha One Lower Unit Gearcase 3.0L 4.1L 5.0L 5.7L Gen I 1983-1990 steering wheel however this one dates to

however this one dates to the 70's or 80's

Part # 376073 0376073

but you may need to replace the bearings while you are in there

0L 140hp / 5

43-34467 Timing Gear (which is what makes this particular listing applicable to the 1964-1971 range)

MerCruiser Alpha One Lower Unit Gearcase 3.0L 4.1L 5.0L 5.7L Gen I 1983-1990 steering wheel however this one dates toItem Details 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) It comes empty. Make sure it gets filled with the proper gear oil from the bottom up. Comes with new impeller installed. No leaks or bad seals found after pressure testing. Gear oil will be drained before shipping. No