Re: Mercury DNA

[thepetrolist]

All Mercury outboards nowadays under 30 HP are made by Tohatsu, as goes for Mariner too. Don’t know when they took over production but it might have been in the early eighties?

The rest of your questions I’ll leave for someone else to answer, but a wild guess would be that they had higher compression and/or different jet setup in the carb which gave a slightly higher hp output.