I have a 40 Merc outboard, 4 cyl, twin carbs. At what approximate rpm do I
set the jets? Been a while since I looked at them, are there two, or just
one? It is somewhat difficult to set the high end, as you are bouncing
along and trying to listen and turn the screwdriver all at once. Which carb
do I set first? Or does one carb feed two cylinders, and it doesn't matter,
and I just need to get them both close? Do I do it strictly by sound, or do
I get them right, then screw them in and count the turns, then back them
both back out to the same turns on both?

Thanks

Steve