Sell a lot of Stihl saws.
MS250 is a 4 position switch.
Off, run, high idle, choke.
95% of non starting Stihls are flooded.
If you miss the “pop” when on choke & pull another time, your saw WILL flood.
Once you hear it fire, place on high idle, them one or two more pulls your saw should rev to high idle.
If flooded, best to remove plug, blow excess gas from cylinder & start over. If you have Popeyes arms…… place switch to run position, squeeze throttle tight & pull. Be wise with this method unless you enjoy ER visits.