I've been struggling with this carb for a while now.
So far, I've fixed a big air leak on the adapter plates. Also found where the PO put a homemade gasket in the choke diaphragm, which was causing a leak there as well. I also had some float issues and was starving for gas. I'm really surprised this thing even ran.
But I still have an intermittent idle issue. Sometimes, when I start the engine, it idles great. I can turn it off and turn it back on and sometimes it will idle great, sometimes it won't. It's definitely a lean issue because if I cover the intake with my hand or with the choke plates, it idles smooth.
Well, this afternoon I was checking the bowl level, again, and happened to lift the top cover off the carb as it was running to make sure I was getting good fuel. It instantly started running better.
If I put it back on, it still wouldn't idle great, but at least it wasn't dying. I put it on and off a few times and sometimes it would idle better when I put it back on, but it always runs better when it's off.
So I checked the power valve and it will not hold vacuum when I push it and close off the port. I just ordered a new one. Is there anything else that would be affected when I crack open the top of the carb??