Mercury-Mercruiser 851-6663A3 CYLINDER BLOCK AND CRANKCASE ASSEMBLY
851-6663A3 CYLINDER BLOCK AND CRANKCASE ASSEMBLY has been superceded to a new part number.
The newest part number is 7940A6 -click here- to see the newest superceded part
Please note the new superceded part is a functional replacement and may look differant from the original part
Manufacturer part number: