Runs at FAST idle, not slow

Muchas Gracias... for your thoughts, I appreciate the lead to the carb. I don't have a tach, just a timing light. I thot I'd bring it to a carb shop so it was done "right". I'm fairly handy(just rebuilt the lower unit on my Johnson 150 boat engine and it purrs....) so I think I'll order a carb rebuild kit and soak it for a few days. You guys recommend any in particular????

It has "LIST 2534" stamped on it, so I don't think it's a 1920. I forgot to mention I installed a new fuel pump as well.
Thanks again - I appreciate it. Will let you know how I make out.