Al A. wrote:
I think I may have the dreaded fuel-filter-in-the tank, as i looked
but could not find an external one, but I am planning to look again
and ask my parts guy to check if he lists one. I have the same problem
running on either of my tanks, which as it happens, each have fuel
from a different gas station. So I am thinking bad fuel/water is
unlikely.

No, it isn't the fuel filter. That could DEFINITELY cause problems
when cruising, even worse when accelerating, but is not likely
to cause a slow idle.

Jon