MerCruiser Alpha One Clutch Dog 52-66063 Sliding Gen I Lower Unit Gearcase 70-90 Couplers This is Off a Mercury

This is Off a Mercury Mark 30E-2 4 cylinder Turbo Four (serial # 1086691)

but I did test this and it is completely functional

I'm not sure how long they have been sitting

1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 Stern Drive Alpha One Carburetor Carb Top Cover

I've also included a photo that does a good job of visually portraying the dimensions

MerCruiser Alpha One Clutch Dog 52-66063 Sliding Gen I Lower Unit Gearcase 70-90 Couplers This is Off a MercuryItem Details MerCruiser Sliding Propeller Prop Shaft Clutch dog 52 66063 used in all MC 1 R MR Pre Alpha Gen 1 Alpha 1 lower units 1977 1990 Used but in great shape! This is a stock photo you will receive one in similar condition. Application OEM SLIDING CLUTCH 52 66063, Same as: 52 824112 52 853594 52 853594T & aftermarket Sierra 18 2202 For 888 drives s n 3784375 and up For #1 drives s n 3469428 and up They used the same lower gearcase with all of