So I decided to get back on this tonight. When I can’t figure something out, I move on to something else for a day or two or in this case, a week. I try to rethink my steps and keep thinking about the issue at hand. I decided to tear the carb down again and inspect everything again. It still looks good and carb cleaner and air go through all the ports and passages how they are intended. So I bolted it back on, put some gas in the bowls, and cranked it over. It fired immediately and the same symptoms. I then put my hand on top of it to choke it out some and it decided to stay running on its own. I adjusted the four corner idle screws and the fast idle screw and got it to run without my hand on it. It ran terrible but ran. So I shut it off and took the Carb back off. It either is getting too much air or not enough fuel. I took the baseplate off and started looking at it closely. It has a small hole in the throttle blades for idling purposes and thought about plugging them to limit some of the air but in my experience with a bigger cam and cubic inches with good flowing heads, those holes make a huge difference. So I’m thinking and looking at the baseplate and I see it, a crack in the casting. I don’t have another baseplate to swap it out at the moment but I will get one and I’m hoping this is the issue. Thanks for all the input everyone! Now I’m thinking why did it crack and how?
