To start a "Cold" Stihl Chain saw you lock the throttle down while moving the run level all the way to the bottom. This bottom position is the choke and you pull the saw at this position until you get a "Burp" then move the run lever to the run position and pull until it starts, most times 2 or 3 pulls max. When the saw starts release the chain brake, if you set it, and press the trigger to disengage the full throttle lock and now manually run the saw power up an down with the trigger until the saw is running smoothly.
If you pull while the saw in the choke position past where the saw gave a slight "burp" you will flood the saw and you will need to remove the spark plug and let the saw sit of a few minutes before reinstalling he plug and going thru the start procedure again.
If the saw is warm you place the saw in the run position and pull the saw to start, do not start a warm saw in the choke position.
If the saw just stops running while you are using the saw that is a whole different issue, take it to the dealer.
