MerCruiser 45-853647 Alpha One Driveshaft Gen II Lower Gearcase 3.0L 4.3L 1998Up Mercruiser Propeller 325 GM 427 V-8 1969-1972

325 GM 427 V-8 1969-1972 2278747 THRU 3780449

500 50hp 650 65hp 800 80hp 850 85hp 4cyl 6cyl

I'm sure there is a replacement in the included kit if you want to replace this

but all of the metal is in good shape and the internal surfaces are great yet

Overall Length: 10-11/32" > 10-5/16"

MerCruiser 45-853647 Alpha One Driveshaft Gen II Lower Gearcase 3.0L 4.3L 1998Up Mercruiser Propeller 325 GM 427 V-8 1969-1972Item 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