Re: Mercury 50 hp 1967

[billw]

It is not simple at all, sorry to say. The entire drive shaft housings are different, shift shaft, drive shaft….etc. To change the drive shaft requires a good bit of gear case disassembly, which technically would involve re-shimming the pinion gear, at the very least. I’m going to be totally lazy and not look this up; but there is even a good chance that the 20" swivel bracket is longer than the 15". In a lot of cases, the 20s had shock absorbers and the 15s didn’t. The 15" stuff is pretty rare to find, too, in my experience….

Long live American manufacturing!