MerCruiser Propeller Prop Shaft 44-824110 Gen I One Lower Unit Gearcase 44-66060 18hp Also take note of the

Also take note of the fittings

225-S (4 BBL

1490-7256A 2

but may need to be cleaned or gone through or rebuilt before installation

there were a few differences

MerCruiser Propeller Prop Shaft 44-824110 Gen I One Lower Unit Gearcase 44-66060 18hp Also take note of theItem Details MerCruiser Propeller Shaft 44 66060 44 824110 used in all MerCruiser R MR Pre Alpha Gen 1 Alpha 1 lower units 1970 1990 (some parts here were used a broader number of years) In a nutshell Replaces: 44 66060, 44 66060 3, 44 824110, 44 824110 For all MC 1 & MR ALPHA Units S N 2791957 & above. Also for 165 (6 cyl.) S N 2763442 & above (1970 1990) They used the same lower gearcase with all of the engines so you're particular engine is not