Briggs auto choke..

[scoyote]

This is a common problem with people shutting down to dump clippings and then trying to restart a hot engine. The mower defaults to choke when it shuts down ready for the next cold start--it has a tiny spring to assist a return to choke--Once the engine starts the unobstructed air vane and a correctly operating thermostat should overwhelm the tiny spring and hold the choke open---The problem is the restart of a hot engine if the choke stays on with a faulty auto choke thermostat not doing its job .Whateveer happened to pull your choke on and push it off---too easy! Best to not shut down imho