Carb problems

When the engine is cold you should be able to reach down there and turn the weight by hand.
If not, it's probably frozen closed.
Pulling the manifild and removing the plate will fix it, but it won't cross the heat over anymore and take a little longer to get warmed up in the mornings. (not the heater, but the engine)
It may hiccup a bit when driven before the engine gets warmed up enough.