MerCruiser Sierra 18-2180 45-42634 Driveshaft Alpha One Gen 1 Lower Unit 1983-90 Valve Covers Notable Parts Included: (you will

Notable Parts Included: (you will receive items as pictured)

The main difference between all of these is port configuration

MerCruiser 52078 Mounting Bracket (Front-Starboard Side)

9hp / 15hp outboards carburetor assemblies 1988-1991

7L / 305 5

MerCruiser Sierra 18-2180 45-42634 Driveshaft Alpha One Gen 1 Lower Unit 1983-90 Valve Covers Notable Parts Included: (you willItem Details Sierra Marine 18 2180 MerCruiser Lower Unit Drive Shaft Equivalent to 45 42634 used in all MerCruiser MR & Alpha One Gen I lower units 1983 1990 <<< Please make sure that the one you are replacing does not have a pre load pin**** If you are looking for one with a preload pin (1970 1982), please contact us and we should be able to help. Very little Normal wear on the splines. We left the bearing on here, it should be good, but you will