Carb cleaner isn’t the best choice. You’ll get better results with engine starting spray, or dribble a few tablespoons of gas down the throat of the carb just prior to cranking the engine.
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Starting fluid can do major damage, sometimes they fire so good the piston keeps going down.
dripping gas into carb can flame back at you & fuel container you are dripping from. Have seen both of these things happen. I have been using spray choke cleaner all my professional life, never seen a issue.