What type of choke is on it, Jag?
Is it a spring on the mainfold, or is it built into a black round plastic piece?
If its that type, the spring in the round piece may be shot, or not connected up to the choke. There are also electric springs on some models.
Actually, I just looked at the pic in your album. It's the non electric type. The spring inside has to go through the slot in the shaft in the centre to make it work. Adjust it so the choke just closes when cold. If it doesn't open when it warms up, the spring is shot.