Mercury Kiekhaefer Outboard Mark 30 Fuel Pump Line Diaphragm 23009A1 1956 1957 Steering Helm Parts but you should be able

but you should be able to just compare against your part number and also note whether or not you have the Deflector plate on the bottom as not all of them had these especially later models

The compatibility noted above is a very well-educated guess using online resources as to what this item is compatible with

170hp 200hp 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 270hp 260hp 170hp 230hp 175 200 270 260 170 230 185 hp Alpha One Gen 1 Gen II Bravo Sterndrive Stern Drive I/O Single Double Triple Slot Pulley Pully 3858533 BJ

May have been used on these other brand boats:

305679 305579

Mercury Kiekhaefer Outboard Mark 30 Fuel Pump Line Diaphragm 23009A1 1956 1957 Steering Helm Parts but you should be ableThis is Off a Mercury Mark 30 1 (serial # 994104) Possibly 1956, 1957 or 1958 Item Condition: Good Condition Untested For Parts, but may be fully functional Fuel line hoses have some dry rot but don't appear to have cracks all the way through Part#'s Fuel Pump Assy. 23009A1 23009 Fuel lines: 32 23837, 32 23732, 32 23837 Untested 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