Not sure what you are calling the choke since that carb doesn't use a choke because it is a primer engine. I suspect the problem is a dirty carb, or bad gas that is causing the issues. I don't see anything missing from the carb area, and everything looks like it is in the correct location. Wouldn't hurt to clean some of the junk out around the little metal kill tab next the small plastic square, could be shorting to ground and causing ignition issues.