Trouble with a new Thermoquad Installation

When you start it, put you hand gently over the choke horn. Your had will be acting as a choke. If it revs up/smooths out/ keeps running you either have a vacuum leak ( which can clear up when hot) or the choke needs to be adjusted. How much tension is on the choke plate when cold. You should be able to feel some spring tension when you push on it with your finger.

Garth