Re: new member
Welcome, it does sound like a air leak. If the carb is tight try sealing around the intake with rtv or yellow type glue, it might not look good but will let you know if that's the problem. As for the fuel mix 24/1 is what most of us run in a new engine for a couple of tanks then 32/1 or maybe 40/1 with a synthetic or semi synthetic oil.
Your results may not be the same,Greg