Mercury Kiekhaefer Outboard Mark 30 1956 Bolt Washer Nut Set Choke 20663 20746 Engine Mounts This is from the first

This is from the first MerCruiser Models ever produced (1963) This is the earliest model of the transom brackets they produced as well

but hopefully you are buying this for the other parts

60hp (20" Transom): 1986-1987

Would have also been applicable to the Speedifour applications but a different color

Mercury Kiekhaefer Outboard Mark 30 1956 Bolt Washer Nut Set Choke 20663 20746 Engine Mounts This is from the firstThis is Off a Mercury 1956 Mark 30 1 4 cylinder Turbo Four (serial # 994104) May work with 1957 or 1958 Item Condition: Please inspect condition in pictures Surface rust on most Part#'s Choke Knob: 20663 Water Tube Plate: 20746 Spacer: 23 20326 Hold down lug: 23620 Other Related Models: Mark 30, Mark 30 1, Mark 30 2, Mark 30 3, Mark 30E, Mark 30E 1 Mark 30 2, Mark 30, Mark 30H 950250 and below, 984920 thru 102598, 1031987 thru 1163545, 1163546 and