[Mart]

Could be one of the many reasons a carb runs rich. I'm only familiar with the 94 carbs. If you have a 94 you could check for:
Punctured float.
On seating needle valve.
Ruptured power valve.
incorrect or failed power valve gasket.
Vac leak into power valve chamber. (lower and middle card bodies warped).

I'd be looking at all those.

Mart.