Question ... was it a blistering hot day or not too bad? i.e. does it only do this stutter on very hot days or has it also done this on a cooler day?
550xp and 562xp have had hot start issues due to heat soak caused by what seems to the very close proximity of the carb to the swept back cylinder design.
The workaround for me has been 1) open up the muffler 2) provide a larger escape hole for trapped heat to escape through the cover 3) create an aluminum tape firewall between the carb and the cylinder to reflect some of the heat away from the carb.
Not saying this is your problem, just giving you a heads up to the hot start issue that has affected many of these Husky saws, in case it might be part of the equation.