Re: 1967 Mercury Merc 60 6hp Sneezing and stalling

[DAVID]

a few things can do it.
the idle tube may be dirty the brass screw pic #2 center of top of carb . remove and clean
the idle adjustment mat be to lean . idle adjust screw recessed in the front of the carb. out is rich in is lean start at 1 1/2 turns out from lightly seated.
may be a vaccum leak check by a VERY light spray of starting fluid around any place you think it might be leaking
or as simple as breathing exhaust while running in the tank. use a fan to remove the exhaust when you run it.

just for starters.