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Used from 1979-1986 on most OMC GM V6 & V8 engines with 2bbl Rochester Carburetor (3" opening) Also used on some (V6 3
5L 153CID / 140hp 3
150-235hp (150hp 155hp 185hp 235hp possibly others)
also note the hex distributor shaft that goes into the oil pump
MerCruiser 45-853647 Alpha One Driveshaft Gen II Lower Gearcase 3.0L 4.3L 1998Up Brackets Braces Levers Linkages Used from 1979-1986 on mostItem Details MerCruiser Lower Unit Drive Shaft 45 853647 used in all MerCruiser Gen II Sterndrive gearcases 1998 & UP (1. 81: 1 1. 94: 1 2. 00: 1 2. 40: 1) Ratio (which is 3. 0L & 4. 3L) Basically the difference between 45 853648 & 45 853647 is that the 45 853648 was the "heavy duty" version of 45 853648. Dimensionally they were the same otherwise, and the 1998 & up gearcases used a different bearing & retainer on the shaft. This will also replace 45
US$ 116.25
US$ 150.99
US$ 12.86
US$ 371.96