Sounds like spark plug wires to 1 and 2 are reversed and fiddling with the
carbs is just leaning out the firing cylinders to confuse the issue.
Remember the firing order is 1,3,4,2 and the Dizzy goes counter clockwise.
So maybe 1 and 2 are firing but not at the right times? Easy enough to
check anyway.
Dick Rz.
> All right all you mystery lovers. My "new" engine starts perfectly and
> runs easily - on two cylinders, 3 and 4. Cylinders 1 and 2 are flooded
> out and will not fire. At one point, cylinder 2 was firing enough to make
> the plug sooty. Cylinder 1 was always wet with gas. Pretty much
> everything is either new or cleaned and checked. Electronic ignition, new
> wires, rotor, cap, coil plugs. Spark to all cylinders confirmed by inline
> checker. Compression mid 170's on 1, 2, and 4, mid 160's on 3 (which is
> firing). The same problem occurred with two different sets of carbs.
>
> Here's the fun part. When the carbs were set at 12 flats down, plugging
> the front carb caused a large increase in speed. Plugging the back carb
> caused instant death. I leaned the front carb pretty much all the way to
> the top because cylinders 1 and 2 were flooding. In that condition, I
> covered the intake with my hand and absolutely nothing happened, as though
> there were no airflow through the front carb at all. The vacuum felt very
> weak compared to the rear carb. There does not appear to be anything
> wrong with the butterfly. No evidence of leaking by an ether test at the
> gaskets, etc. Later, I even stuck my finger in the manifold to see if
> there were a mouse nest or something.
.
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