Wow, thanks! I have already replaced the 394 diaphragm and checked the 612 screen. But didn't know about the screw tightening sequence, maybe I messed something up. It's now past mowing weather so I have time to work on it. Thanks again!
it might be running rich since it starts fine and dies when warm. carbs are cheap on ebay. buy one and let us know...Replaced the diaphragm, checked for trash in the fuel pickup, all good. Ran somewhat better after this but very rough as if fuel mixture is off. I guess I could replace the carb??