I put Stabil in it before I shut it down and put it up for the winter. I was using Regular gas in it. A guy from Church said he never runs Regular. Only Premium. There might be some of the Regular gas left in it. He came out and adjusted the screws in the front, but I don't think he quite got it right. I took off the air cleaner last night, and used the flash light and pulled back on the throttle. Shot gas in from both sides. If I pull off the vacuum line from the carb can I then adjust the two screws?? Both Low speed and High speed adjustment screws have to be adjusted as well. If none of that doesn't work.. Then I will pull it from the intake. Does Edelbrock have a blowup of how to do this?? Al