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You can find what they look like right here on this site.----engine diagrams------1974 accessories and click away.------External motor and external cylinders.-----Your location ?
I think it is on the list.-----But look on the 1975 and 1976 accessories pages too.-----You can and will find it.-----Sorry you are too far away for me to help with a used one.
Well----I can find the part # for the entire assembly.-----Perhaps take those numbers and put them on ----google -----And see what shows up.
Related question: will the tilt/trim from a 76 135hp fit my 74 115hp? if so, i may have found a local one.