"The mechanic said he thinks it might be carburation and started spraying some of my carb cleaner in it while I pulled the chord."
It sounds like the engine got flooded with carb cleaner. Normally one would use spray carb cleaner with the engine running not as one would try to start an engine. Probably have to change the plugs in order to get the engine started. You may have to use a spray starting fluid to get the engine started again. If that doesn't work, the carb may have to come off for a rebuilding. Good luck.